Powermatic Saw COS18 User Manual

OWNER’S MANUAL  
Model COS18 Cut-Off Saw  
Left-Hand model shown,  
with 8' and 4' optional roller tables  
WMH TOOL GROUP  
Industrial Machinery Division  
427 Sanford Road  
LaVergne, TN 37086  
Ph: 800-248-0144 Fax: 800-274-6840  
M-0460277 10/03 Rev. B  
Copyright © WMH Tool Group  
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TABLE OF CONTENTS  
Safety Rules...............................................................................................................................................4-5  
Safety Decals ................................................................................................................................................ 6  
Specifications................................................................................................................................................ 7  
Features........................................................................................................................................................ 8  
Receiving ...................................................................................................................................................... 9  
Installation & Assembly.................................................................................................................................. 9  
Handwheel............................................................................................................................................. 9  
Electrical Connections ......................................................................................................................... 10  
Extension Cords .................................................................................................................................. 10  
Dust Collection .................................................................................................................................... 11  
Operating Controls............................................................................................................................... 11  
Installing/Changing Blade .................................................................................................................... 11  
Air Supply............................................................................................................................................ 12  
Squaring the Fence.............................................................................................................................. 12  
Installing Roller Tables (Optional) ........................................................................................................ 12  
8-Foot Table Guide.............................................................................................................................. 14  
Leveling & Aligning Roller Tables ........................................................................................................ 14  
Adjustments................................................................................................................................................. 15  
Blade Travel ........................................................................................................................................ 15  
Clamp Height Adjustment .................................................................................................................... 15  
Belt Replacement ................................................................................................................................ 16  
Operation .................................................................................................................................................... 16  
Maintenance................................................................................................................................................ 16  
Optional Accessories................................................................................................................................... 17  
Parts Lists & Exploded Views:  
Table & Motor Assembly................................................................................................................. 18-21  
Stand Assembly.............................................................................................................................. 22-24  
Air Control Assembly ...................................................................................................................... 25-27  
Safety Guard Assembly .................................................................................................................. 28-31  
4' Roller Table Assembly ................................................................................................................ 32-33  
8' Roller Table Assembly ................................................................................................................ 34-35  
Pneumatic Diagram ........................................................................................................................ 36-37  
Electrical Schematic.................................................................................................................................... 38  
Preventive Maintenance Checklist............................................................................................................... 39  
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SAFETY RULES  
As with all machines, there is a certain amount of hazard involved with the use of this cut-off saw. Use the  
machine with the respect and caution demanded where safety precautions are concerned. When normal  
safety precautions are overlooked or ignored, personal injury to the operator can result.  
Read, understand and follow the safety and operating instructions found in this manual. Know the  
limitations and hazards associated with this machine.  
Electrical grounding. Make certain that the machine frame is electrically grounded and that a ground lead is  
included in the incoming electrical service. In cases where a cord and plug are used, make certain that the  
grounding plug connects to a suitable ground. Follow the grounding procedure indicated in the National  
Electrical Code.  
Eye safety. Wear an approved safety shield, goggles, or glasses to protect eyes. (NOTE: Common  
eyeglasses are only impact-resistant, they are not safety glasses.)  
Personal protection. Before operating the machine, remove tie, rings, watch and other jewelry and roll up  
sleeves above the elbows. Remove all loose outer clothing and confine long hair. Protective type footwear  
should be used. Where the noise exceeds the level of exposure allowed in Section 1910.95 of the OSHA  
Regulations, use hearing protective devices. Do not wear gloves.  
Guards. Keep the machine guards in place for every operation for which they can be used. If any guards are  
removed for maintenance, DO NOT OPERATE the machine until the guards are reinstalled. The blade guard  
is air actuated; it is also a clamp for stock. Never shut off or disconnect air while operator or bystanders are  
near guard.  
Work area. Keep the floor around the machine clean and free of scrap material, saw dust, oil and other  
liquids to minimize the danger of tripping or slipping. Be sure the table is free of all scrap, foreign material  
and tools before starting to cut. Make certain the work area is well lighted and that a proper exhaust system is  
used to minimize dust. Powermatic recommends the use of anti-skid floor strips on the floor area where the  
operator normally stands and that each machine’s work area be marked off. Provide adequate work space  
around the machine.  
Avoid accidental starting: Make certain motor switch is in off position before connecting power to the  
machine.  
Operator position. Maintain a balanced stance and keep your body under control at all times.  
Housekeeping. Before turning on machine, remove all extra equipment such as keys, wrenches, scrap, and  
cleaning rags away from the machine.  
Careless acts. Give the work you are doing your undivided attention. Looking around, carrying on a  
conversation, and “horseplay” are careless acts that can result in serious injury.  
Disconnect all power sources (both air and electric) before performing any service, maintenance,  
adjustments or when changing blades. When the air line is disconnected or turned off, the guard will  
immediately drop down to the table. Keep hands clear of guard at all times. A machine under repair should be  
RED TAGGED to show it should not be used until the maintenance is complete.  
Maintain cutting tools in top condition. Keep blades sharp and clean for safe and best performance. Dull  
tools increase noise levels and can cause kickbacks and glazed surfaces. Check the condition and  
adjustment of the tools before making any cuts.  
Hand safety. Keep hands outside the machine. Do not clear chips and sawdust with hands; use a brush.  
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Job completion. If the operator leaves the machine area for any reason, the cut-off saw should be turned  
"off" and the blade should come to a complete stop before his departure. In addition, if the operation is  
complete, he should clean the saw and the work area. NEVER clean the saw with power "on" and never use  
the hands to clear sawdust and debris; use a brush.  
Replacement parts. Use only Powermatic or factory authorized replacement parts and accessories;  
otherwise the warranty and guarantee is null and void.  
Misuse. Do not use this Powermatic cut-off saw for other than its intended use. If used for other purposes,  
Powermatic disclaims any real or implied warranty and holds itself harmless for any injury or damage which  
may result from that use.  
If you are not thoroughly familiar with the operation of cut-off saws, obtain advice from your supervisor,  
instructor or other qualified person.  
Drugs, alcohol, medication. Do not operate this machine while under the influence of drugs, alcohol, or any  
medication.  
Health hazards. Some dust created by power sanding, sawing, grinding, drilling and other construction  
activities contains chemicals known to cause cancer, birth defects or other reproductive harm. Some  
examples of these chemicals are:  
* Lead from lead-based paint.  
* Crystalline silica from bricks and cement and other masonry products.  
* Arsenic and chromium from chemically-treated lumber.  
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your  
exposure to these chemicals, work in a well-ventilated area, and work with approved safety equipment, such  
as those dust masks that are specifically designed to filter out microscopic particles.  
Familiarize yourself with the following safety notices used in this manual:  
CAUTION: (This means that if precautions are not heeded, it may result in minor or moderate injury  
and/or possible machine damage)  
WARNING: (This means that if precautions are not heeded, it could result in serious injury or  
possibly even death).  
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SAFETY  
Familiarize yourself with the location and content of these decals on your machine.  
FIGURE 1  
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SPECIFICATIONS: COS18 Cut-Off Saw  
Stock number (COS18L).....................................................................................................................1791294  
Stock number (COS18R)....................................................................................................................1791289  
Motor............................................................................................................................. 10HP, 3Ph, 230/460V  
Blade size......................................................................................................................... 18" diameter / 120T  
Arbor size.....................................................................................................................................................1"  
Arbor speed.....................................................................................................................................3320 RPM  
Cutting capacity @ maximum height .......................................................................................4-3/8" x 10-1/2"  
Cutting capacity @ maximum width...............................................................................................1" x 13-3/8"  
Table size....................................................................................................................................26-1/2" x 28"  
Table height................................................................................................................................................33"  
Air supply required................................................................................................................. 15 CFM / 70 PSI  
Cycles per minute (maximum)..................................................................................................................... 70  
Dust port.......................................................................................................................................................4"  
Minimum CFM........................................................................................................................................... 600  
Gross weight........................................................................................................................................850 lbs.  
Net weight ...........................................................................................................................................730 lbs.  
NOTE: The above specifications were current at the time this manual was published, but because of our  
policy of continuous improvement, Powermatic reserves the right to change specifications without notice and  
without incurring obligations.  
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FEATURES: COS18 Cut-Off Saw  
FIGURE 2  
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RECEIVING  
Open shipping crate and check for shipping  
damage. Report any damage immediately to  
your distributor and shipping agent. Before using  
the cut-off saw, read the instruction manual  
thoroughly for assembly, maintenance and safety  
instructions.  
Contents of crate:  
1 Cut-off saw  
1 Handwheel  
1 Toolbox containing:  
1 hex wrench set  
1 socket wrench  
1 open-end wrench set  
1 Manual  
1 Warranty card  
INSTALLATION & ASSEMBLY  
1. Lift the machine with a hoist or forklift, using  
a sling through the lifting eye on top the  
machine, shown in Figure 3. Make sure the  
capacity of the lifting unit is sufficient to  
safely lift this size machine.  
2. The cut-off saw (with any roller table  
extensions) should be located in an area that  
is well-lit, with enough room around it for  
loading and off-loading stock and general  
servicing of the machine.  
3. The saw cabinet should be bolted to the floor  
through the holes at the four corners, using  
high quality lag screws.  
Unpainted surfaces, such as the table and fence,  
have been given a protective coating at the  
factory. This should be removed with a soft rag  
moistened with a good commercial solvent. Do  
not use acetone, lacquer thinner, gasoline or any  
flammable solvents. Do not use an abrasive pad.  
HANDWHEEL  
Install the handwheel onto the threaded rod as  
shown (Fig. 3).  
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ELECTRICAL CONNECTIONS  
WARNING: Electrical connections must  
be made by a qualified electrician in  
compliance will all relevant codes. The  
machine must be properly grounded to  
help prevent electrical shock and  
possible death.  
A power plug is not provided with the COS18.  
You may either connect one, or "hard-wire" the  
machine directly to your electrical panel provided  
there is a disconnect near the machine.  
Consult electrical schematic on page 34 for  
further clarification of wiring setup.  
This machine must be grounded. Grounding  
provides a path of least resistance to help divert  
current away from the operator in case of  
electrical malfunction.  
Make sure the voltage of your power supply  
matches the specifications on the motor plate of  
the machine.  
After wiring, disconnect machine from power  
source, open the blade access door, remove the  
internal clear panel, and remove the blade (see  
"Installing/Changing Blade"). Re-connect the  
power and turn on the saw motor (see "Operating  
Controls"). Observe the rotation of the arbor – it  
should rotate counterclockwise on the LH model,  
clockwise on the RH model. If it does not, turn off  
the machine, disconnect power, and switch any  
two of the three electrical leads.  
NOTE: A label is affixed to the internal clear  
panel to help identify proper rotation.  
EXTENSION CORDS  
If an extension cord is necessary, make sure the  
cord rating is suitable for the amperage listed on  
the machine's motor plate. An undersized cord  
will cause a drop in line voltage resulting in loss  
of power and overheating.  
The chart in Figure 4 shows the correct size cord  
to use based on cord length and nameplate amp  
rating. If in doubt, use the next heavier gauge.  
The smaller the gauge number, the heavier the  
cord.  
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DUST COLLECTION  
Powermatic recommends the use of a dust  
collection system with this cut-off saw. The  
collector should have sufficient capacity (600  
CFM) for this size machine.  
Mount the dust collector via a 4" hose to the  
outlet on the blade access door.  
OPERATING CONTROLS  
Control buttons are in two locations on the saw,  
and are shown in Figure 5. A main start and stop  
button is located at the back of the table top. An  
emergency stop button is also found on the front.  
The air-control switch, in both locations, starts the  
flow of air to the cylinder.  
INSTALLING / CHANGING BLADE  
1. Disconnect machine from power source.  
WARNING: Never attempt to open blade  
access door until blade has come to a  
complete stop.  
2. Open the saw blade access door by  
loosening the screws.  
3. Remove the clear panel guarding the blade  
(Fig. 6) by loosening the screws and lifting  
up on the panel.  
4. Lock the arbor by pulling the lever (Fig. 8).  
4. Loosen hex screw (Fig. 7) on the arbor.  
(counterclockwise to loosen on the LH  
model; clockwise on RH model). Remove  
hex screw and outer flange from the arbor.  
5. Mount the blade on the arbor as shown,  
making sure the teeth are pointed in the  
proper direction – the teeth at top of blade  
should point toward rear of machine.  
6. Re-install outer flange and screw, and  
tighten securely.  
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7. Re-install clear panel and close blade access  
door, fastening it securely. NOTE: A sensor  
switch on the door will automatically shut  
down the saw if the door is opened while the  
blade is moving.  
WARNING: Do not reconnect power, air  
or electric, without internal clear panel in  
place and door securely fastened with  
screws.  
AIR SUPPLY  
The correct air pressure for the COS18 saw is 70  
PSI. Attach the hose from your air source to the  
machine's air valve as shown in Figure 9.  
SQUARING THE FENCE  
The best way to square the fence is to make  
sample cuts. Using a square, check the end of a  
board after it has been chopped. If the cut is not  
square, proceed as follows:  
1. Loosen one of the bolts on the fence and  
lightly tap the fence with a block or mallet.  
2. Retighten the bolt, and make another cut.  
Repeat as necessary until fence is square.  
INSTALLING ROLLER TABLES  
(OPTIONAL)  
Four-foot and 8-foot roller tables are available as  
accessories to your cut-off saw. The roller tables  
can be used as infeed or outfeed tables and  
mounted to either side of the saw. The terms  
"Right Hand" and "Left Hand" Model are  
determined by the location of the blade in  
reference to the main table. (The cover of this  
manual shows a left-hand model.)  
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To mount roller tables to saw:  
1. Mount an angle bracket to the pre-drilled  
holes in the side of the saw cabinet with four  
M8 x 20 hex cap screws and four M8 flat  
washers (Fig. 10). Do not fully tighten yet.  
2. Place the roller table upside down on a flat  
surface and attach the leg assemblies with  
four M8 x 25 hex cap screws, eight M8 flat  
washers, and four M8 hex nuts per leg  
assembly (Fig. 11).  
3. Screw an adjustable foot pad into each leg  
as shown in Figure 12.  
4. Flip the roller table right-side up and mount it  
to the angle bracket on the cabinet as shown  
in Figure 10. Use two M8 x 25 screws, four  
M8 flat washers and two M8 hex nuts. Do not  
fully tighten yet.  
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8-FOOT TABLE GUIDE  
1. The 8-foot table comes with a guide and  
scale. The guide should be mounted to the  
edge of the table with six M8 x 27 square  
head bolts, six M8 flat washers and six M8  
hex nuts (Fig. 13).  
2. Attach the three stops to the 8-foot table  
guide (Fig. 13). These stops can be slid to  
any point along the guide and secured by  
tightening the lock levers.  
LEVELING & ALIGNING ROLLER TABLES  
Each roller table must now be leveled with the  
main saw table and aligned with the fence. (The  
fence must be square with blade – see "Squaring  
the Fence", page 11.)  
WARNING: Disconnect saw from both  
air and electric power sources.  
1. Select a piece of scrap board with a good  
straight edge, 4 to 6 feet in length.  
2. Raise the blade guard and keep it raised.  
Place the board, straight edge down, on the  
saw table surface and allow it to extend to  
the second or third roller of the roller table  
(Fig. 14).  
3. Level the roller table by loosening the hex  
nut on the foot pad and screw the foot pad in  
or out. (see Fig. 12).  
4. When roller table and main table are level,  
tighten the nuts on the foot pads.  
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5. Now place the board flush against the fence  
and against the rail of the roller table(s). If  
necessary, shift a roller table horizontally to  
bring it in line with the fence.  
6. When final adjustments have been made  
and re-checked on the roller tables, tighten  
all screws/nuts connecting the roller tables to  
the angle brackets.  
CAUTION:  
Never adjust the outfeed  
table level higher than the level of the  
machine table surface.  
ADJUSTMENTS  
WARNING:  
Disconnect  
all  
power  
sources, both air and electric, prior to  
making adjustments.  
BLADE TRAVEL  
To adjust the speed by which the saw blade (and  
the clamp) travel up and down, open the cabinet  
door and locate the upper and lower pressure  
regulating valves which are attached to the air  
cylinder (Fig. 15). Turning these will regulate the  
travel speed of the blade and clamp. The clamp  
will lower during the blade's upstroke, and rise  
during the blade's downstroke.  
The top valve (shown in Fig. 15) adjusts the  
speed of the blade's downstroke (and the speed  
of the clamp as it rises back up). Turn the knob  
counterclockwise to increase the speed, clockwise  
to decrease. When the speed is satisfactory, lock  
the setting by tightening the knurled nut.  
Repeat for the lower valve, which adjusts the  
speed of the blade's upstroke (and the lowering of  
the clamp).  
CLAMP HEIGHT ADJUSTMENT  
The distance between the stock clamp and the  
workpiece can be adjusted by turning the  
handwheel (Fig. 16). Line up the red indicator  
plate with the measurement on the scale. Ideally,  
there should be a space of 1/8" between the  
clamp and the workpiece. After setting the clamp  
height, move the hex nut downward and tighten  
against the casting as shown – this will prevent  
your setting being altered by machine vibrations.  
IMPORTANT: The clamp height adjustment must  
be made each time the workpiece size changes.  
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BELT REPLACEMENT  
1. Release tension on the v-belt and remove  
old belt.  
2. Make sure the new belt is properly situated  
into the v-grooves of the pulley.  
3. Tension new belt.  
OPERATION  
WARNING: Do not place your hands  
close to the guard/clamp at any time  
during operations. All guards must be  
installed before using the machine.  
1. Start the motor and the air supply.  
2. Adjust height of clamp so it clears the  
workpiece by about 1/8".  
3. Set the appropriate stop(s) on the roller table  
and load the stock on to the machine from  
the infeed side.  
4. When the stock is situated, press the foot  
pedal to make the cut.  
WARNING: If the motor is shut off, but  
the air is still on, the clamp will still be in  
raised position. Turning off the air will  
cause the clamp to lower suddenly. Keep  
hands clear! Re-starting the air will cause  
the clamp to rise suddenly.  
MAINTENANCE  
Frequently drain any water out of the pneumatic  
valve.  
The exposed metal areas on the table and fence  
should be kept clean and free from rust. Apply a  
coat of paste wax as needed. Another option is to  
briskly rub talcum powder into the surface with a  
clean blackboard eraser.  
Bearings should be greased through the fitting on  
the center of the arbor housing (Fig. 18).  
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OPTIONAL ACCESSORIES - COS18 Cut-Off Saw  
Part No.  
Description  
6827037 ............. 8' Roller Table  
6827038 ............. 4' RollerTable  
6080157 ............. Blade, 18" 120T, 1" Bore  
6080158 ............. Premium Blade, 18", 120T, 1" Bore  
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PARTS LIST: Table & Motor Assembly (COS18 Cut-Off Saw)  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1 ......... COS18-101L...........Casting Table (Left Hand)........................... .......................................... 1  
1 ......... COS18-101R..........Casting Table (Right Hand) ........................ .......................................... 1  
2 ......... TS-1505051............Socket Head Cap Screw.............................M10x35.............................. 4  
3 ......... TS-2361101............Lock Washer..............................................M10…………………………..4  
4 ......... COS18-104 ............Bracket....................................................... .......................................... 2  
5 ......... COS18-105 ............Pin ............................................................. 6x30................................ 2  
6 ......... BB-6204ZZ.............Ball Bearing................................................6204ZZ……….…………… . 2  
7 ......... COS18-107 ............Spindle.......................................................…………………………… 2  
8 ......... COS18-108L...........Spindle Frame (Left Hand) ......................... .......................................... 1  
8 ......... COS18-108R..........Spindle Frame (Right Hand)....................... .......................................... 1  
9 ......... TS-1523031............Socket Set Screw.......................................M6x10................................ 2  
10 ....... TS-2211451............Hex Cap Screw ..........................................M12x45.............................. 2  
11 ....... TS-2360121............Flat Washer................................................M12 ................................... 2  
........... COS18-109L...........Spindle Assembly (Left Hand) (Items 12 thru 17 & 19 thru 28)............... 1  
........... COS18-109R..........Spindle Assembly (Right Hand) (Items12 thru 17 & 19 thru 28) ............. 1  
12 ....... COS18-112 ............Main Shaft Housing.................................... .......................................... 1  
13 ....... COS18-113L...........Main Shaft.................................................. .......................................... 1  
13 ....... COS18-113R..........Main Shaft.................................................. .......................................... 1  
14 ....... BB-6206Z ...............Ball Bearing................................................6206Z ................................ 2  
15 ....... COS18-115L...........Spacer (Left Hand)..................................... .......................................... 1  
15 ....... COS18-115R..........Spacer (Right Hand)................................... .......................................... 1  
16 ....... COS18-116L...........Spacer (Left Hand)..................................... .......................................... 1  
16 ....... COS18-116R..........Spacer (Right Hand)................................... .......................................... 1  
17 ....... COS18-117 ............Spindle Collar............................................. .......................................... 1  
18 ....... 6080157 .................Saw Blade.................................................. 18”x25.4x120T................ 1  
19 ....... COS18-119 ............Spindle Collar............................................. .......................................... 1  
20 ....... COS18-120L...........Socket Head Cap Screw.............................M12x30 (L.H.).................... 1  
20 ....... TS-1506031............Socket Head Cap Screw.............................M12x30 (R.H.) ................... 1  
21 ....... COS18-121 ............Key.............................................................7x7x50............................... 1  
22 ....... COS18-122 ............Pulley......................................................... .......................................... 1  
23 ....... COS18-123 ............Adapter ...................................................... .......................................... 1  
24 ....... TS-1503061 ...........Socket Head Cap Screw.............................M6x25................................ 3  
25 ....... COS18-125 ............Special Pin................................................. .......................................... 1  
26 ....... COS18-126 ............Locker........................................................ .......................................... 1  
27 ....... COS18-127 ............Spring ........................................................ .......................................... 1  
28 ....... COS18-128 ............Knob ..........................................................W3/8”x30........................... 1  
29 ....... TS-1492031............Hex Cap Screw ..........................................M12x35.............................. 2  
30 ....... COS18-130L...........Bracket (Left Hand) .................................... .......................................... 1  
30 ....... COS18-130R..........Bracket (Right Hand).................................. .......................................... 1  
31 ....... TS-1503091............Socket Head Cap Screw.............................M6x40................................ 2  
32 ....... TS-1550041 ...........Flat Washer................................................M6 ..................................... 6  
33 ....... COS18-133 ............Fix Plate..................................................... .......................................... 1  
34 ....... TS-1540041............Hex Nut......................................................M6x1P ............................... 6  
35 ....... COS18-135 ............Limited Switch Seat.................................... .......................................... 1  
36 ....... TS-1503041............Socket Head Cap Screw.............................M6x16................................ 2  
39 ....... COS18-139 ............Limit Switch................................................ .......................................... 1  
40 ....... COS18-140 ............Tube Fittings (L type) .................................1/8"x 6.............................. 2  
41 ....... COS18-141 ............Silencer......................................................1/8" .................................... 1  
42 ....... TS-2284252............Pan Head Machine Screw ..........................M4x25................................ 3  
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PARTS LIST: Table & Motor Assembly (COS18 Cut-Off Saw) continued  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
43........TS-1540021 ...........Hex Nut ..................................................... M4x0.7P.............................3  
44........TS-1491101 ...........Hex Cap Screw.......................................... M10x60 ..............................4  
45........TS-1550071 ...........Flat Washer............................................... M10....................................4  
46........COS18-146L..........Motor, 10HP, 3PH, 230/460V, 60Hz (LH)... ...........................................1  
46........COS18-146R .........Motor, 10HP, 3PH, 230/460V, 60Hz, (RH) ...........................................1  
47........TS-1540071 ...........Hex Nut ..................................................... M10x1.5P...........................8  
48........COS18-148............Key............................................................ 10x8x75 .............................1  
49........TS-1523031 ...........Socket Set Screw....................................... M6x10 ................................1  
50........COS18-150............Pulley ........................................................ ...........................................1  
51........COS18-151............Special Flat Washer................................... ...........................................1  
52........COS18-152L..........Socket Head Cap Screw ............................ M10x30 (L.H)......................1  
52........TS-1505041 ...........Socket Head Cap Screw ............................ M10x30 (R.H).....................1  
53........COS18-153............Socket Head Cap Screw ............................ M6x16 ................................2  
55........COS18-155............Fix Plate .................................................... ...........................................1  
56........COS18-156............V-Belt ........................................................ 3V-1310..............................3  
57........TS-1506051 ...........Socket Head Cap Screw ............................ M12x40 ..............................4  
58........TS-2361121 ...........Lock Washer.............................................. M12....................................4  
19  
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Table & Motor Assembly – Left Hand (COS18 Cut-Off Saw)  
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Table & Motor Assembly – Right Hand (COS18 Cut-Off Saw)  
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PARTS LIST: Stand Assembly (COS18 Cut-Off Saw)  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1 ......... COS18-201L...........Stand (Left Hand)....................................... .......................................1  
1 ......... COS18-201R..........Stand (Right Hand)..................................... .......................................1  
2 ......... TS-1481041............Hex Cap Screw ..........................................M5x16........................... 12  
3 ......... TS-1550031............Flat Washer................................................M5 ..................................2  
4 ......... COS18-204 ............Pedal Switch ..............................................230-8A............................1  
5 ........ COS18-205 ............Tube Fittings (I type) ..................................1/4"x 6...........................2  
6 ......... COS18-206 ............Silencer......................................................1/4” .................................2  
7 ......... COS18-207 ............Rubber Sleeve ........................................... .......................................1  
8 ......... COS18-208L...........Front Door (Left Hand) ............................... .......................................1  
8 ......... COS18-208R..........Front Door (Right Hand) ............................. .......................................1  
9 ......... COS18-209 ............Lock ........................................................... .......................................1  
10 ....... COS18-210 ............Key............................................................. .......................................1  
11 ....... COS18-211 ............Emergency Button...................................... .......................................1  
12 ....... COS18-212 ............Quick Fittings .............................................1/4” .................................1  
13 ....... COS18-140 ............Tube Fittings (L type) .................................1/8"x 6...........................2  
14 ....... COS18-214 ............Air Pressure Start Button............................ .......................................1  
15 ....... COS18-215 ............Tube Fittings (T type) .................................1/8"x 6...........................2  
16 ....... TS-1502021............Socket Head Cap Screw.............................M5x10……………………18  
17 ....... COS18-217 ............Plate........................................................... .......................................1  
18 ....... TS-2310051............Hex Nut......................................................M5x0.8P ………………….2  
19 ....... COS18-219 ............Safety Cover, P.V.C................................... .......................................1  
21 ....... COS18-221L...........Side Door (Left Hand)................................. .......................................1  
21 ....... COS18-221R..........Side Door (Right Hand) .............................. .......................................1  
22 ....... TS-1502061............Socket Head Cap Screw.............................M5x25.............................2  
23 ....... COS18-223 ............Exhaust Hood............................................. .......................................1  
25 ....... COS18-225 ............Cover......................................................... .......................................1  
28 ....... COS18-228L...........Air Filter (Oil Type) (Left Hand) ..................MACP300-10A................1  
28 ....... COS18-228R..........Air Filter (Oil Type) (Right Hand)................MACP300-10A................1  
29 ....... COS18-229 ............Ball valve...................................................1/4” .................................1  
30 ....... COS18-230 ............Pressure Gauge ......................................... .......................................1  
31 ....... TS-1550041............Flat Washer................................................M6 ..................................2  
32 ....... TS-1503041............Socket Head Cap Screw.............................M6x16.............................2  
33 ....... COS18-233 ............Connection Block .......................................3/8” .................................1  
34 ....... COS18-234 ............Tube Fittings (L type) .................................3/8”x 10 .........................1  
35 ....... COS18-235 ............Tube Fittings (L type) .................................3/8”x 6 ...........................1  
36 ....... COS18-236 ............Connection Board....................................... ...........…………………1  
37 ....... TS-1532052............Pan Head Machine Screw ..........................M4x15.............................2  
38 ....... COS18-238 ............Connection Box.......................................... .......................................1  
40 ....... TS-1502101............Socket Head Cap Screw.............................M5x45.............................2  
41 ....... COS18-241 ............Rubber Sleeve ........................................... .......................................2  
42 ....... 3312341 .................Powermatic Logo Label .............................. .......................................1  
43 ....... COS18-242 ............Warning Label............................................ .......................................1  
44 ....... COS18-243 ............Warning Label............................................ .......................................1  
45 ....... COS18-244 ............Rotation Blade L.H. Label........................... .......................................1  
46 ....... COS18-245 ............Rotation Blade R.H. Label .......................... .......................................1  
22  
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Stand Assembly – Left Hand (COS18 Cut-Off Saw)  
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Stand Assembly – Right Hand (COS18 Cut-Off Saw)  
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PARTS LIST: Air Control Assembly (COS18 Cut-Off Saw)  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1..........COS18-301.................Toggle Joint .......................................... ...........................................1  
2..........COS18-302.................Shaft ..................................................... ...........................................2  
3..........COS18-303.................Cotter Pin.............................................. SSP-12...............................6  
4..........TS-1540071 ................Hex Nut................................................. M10x1.5P...........................5  
5..........COS18-305.................Shock Absorber..................................... Tokico3243.........................1  
6..........TS-1506131 ................Socket Head Cap Screw........................ M12x80 ..............................1  
7..........COS18-307.................Ring ...................................................... M12....................................2  
8..........COS18-308.................Nylon Ring ............................................ M12....................................2  
10........TS-155108 ..................Lock Washer......................................... M12....................................1  
11........TS-1540081 ................Hex Nut................................................. M12x1.75P.........................5  
12........COS18-312.................Valve .................................................... ...........................................2  
13........TS-2284352 ................Pan Head Machine Screw ..................... M4x35 ................................4  
14........TS-1540021 ................Hex Nut................................................. M4x0.7P.............................4  
15........COS18-140.................Tube Fittings (L type) ............................ 1/8"x 6...............................5  
16........COS18-316.................Plug ...................................................... 1/4"x10...............................1  
17........COS18-317.................Tube Fittings (L type) ............................ 1/4”x 6...............................1  
18........COS18-141.................Silencer................................................. 1/8”.....................................4  
19........COS18-319.................Tube Fittings (T type)............................ 1/4”x 6...............................1  
20........COS18-320.................Tube Fittings (I type) ............................. 1/4”x 10.............................2  
22........COS18-322.................Connector Block.................................... 1/8”.....................................2  
23........COS18-323.................Nipple ................................................... 1/8”x1/8”.............................2  
24........COS18-215.................Tube Fittings (T type)............................ 1/8"x 6...............................1  
25........COS18-325 ................Tube Fittings (L type) ............................ 1/4”x 10.............................1  
26........COS18-326.................Switch Control Box................................ MS-P35..............................1  
27........TS-1533032 ................Pan Head Machine Screw ..................... M5x10 ................................4  
28........COS18-328.................Toggle Joint .......................................... ...........................................1  
29........TS-2310162 ................Hex Nut................................................. M16x1.5P...........................1  
30........COS18-330.................Cylinder................................................. CB-50*230..........................1  
31........COS18-331.................Jointer................................................... 1/4"x3/8".............................2  
32........COS18-332.................Air Regulator......................................... 3/8”.....................................2  
34........COS18-234.................Tube Fittings (L type) ............................ 3/8”x 10.............................2  
35........COS18-335L...............Swaying Arm (Left Hand) ...................... ...........................................1  
35........COS18-335R ..............Swaying Arm (Right Hand).................... ...........................................1  
36........COS18-336.................Special Pin............................................ ...........................................1  
37........COS18-337.................Shaft ..................................................... ...........................................1  
38........TS-2360121 ................Flat Washer .......................................... M12....................................4  
39........TS-0720111 ................Lock Washer......................................... 1/2”.....................................3  
40........COS18-340L...............Bracket (Left Hand)............................... ...........................................2  
40........COS18-340R ..............Bracket (Right Hand)............................. ...........................................2  
42........TS-1491031 ................Hex Cap Screw..................................... M10x25 ..............................4  
43........TS-1551071 ................Lock Washer......................................... M10....................................8  
45........COS18-345L...............Clamp Arm (Left Hand) ......................... ...........................................1  
45........COS18-345R ..............Clamp Arm (Right Hand)....................... ...........................................1  
46........COS18-346.................Limit Switch........................................... ...........................................1  
47........COS18-347.................Danger Label......................................... ...........................................1  
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Air Control Assembly – Left Hand (COS18 Cut-Off Saw)  
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Air Control Assembly – Right Hand (COS18 Cut-Off Saw)  
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PARTS LIST: Safety Guard Assembly (COS18 Cut-Off Saw)  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1 ......... COS18-401 ................ Special Fixed Pin, guider....................... .......................................... 1  
2 ......... TS-0561051................ Hex Nut .................................................1/2”-13 ............................... 1  
3 ......... COS18-403 ................ Rubber Cushion..................................... .......................................... 1  
4 ......... COS18-404 ................ Knob...................................................... .......................................... 1  
5 ......... COS18-405 ................ Handwheel............................................. .......................................... 1  
6 ......... TS-1524021................ Socket Set Screw ..................................M8x10................................ 1  
7 ......... TS-0561081 ............... Hex Nut .................................................3/4”-10 ............................... 1  
8 ......... TS-1491061................ Hex Cap Screw......................................M10x40.............................. 3  
9 ......... TS-2361101................ Lock Washer .........................................M10 ................................... 3  
10 ....... COS18-410 ................ Depth scale............................................ .......................................... 1  
11 ....... COS18-411 ................ Support Seat.......................................... .......................................... 1  
12 ....... COS18-412 ................ Donut, Red sign..................................... .......................................... 1  
13 ....... COS18-413 ................ Stopper.................................................. .......................................... 1  
14 ....... COS18-414 ................ Pin......................................................... 6x40................................ 1  
15 ....... COS18-415 ................ Ring....................................................... .......................................... 1  
16 ....... COS18-416 ................ Lead Screw............................................ .......................................... 1  
17 ....... TS-1492041................ Hex Cap Screw......................................M12x40.............................. 2  
18 ....... TS-2360121................ Flat Washer...........................................M12 ................................... 2  
19 ....... COS18-419 ................ Fence .................................................... .......................................... 1  
20 ....... COS18-420 ................ Control Box............................................ .......................................... 1  
21 ....... TS-1482011................ Hex Cap Screw......................................M6x10................................ 2  
22 ....... TS-1550041................ Flat Washer...........................................M6 ..................................... 9  
23 ....... TS-1533042 ............... Pan Head Machine Screw......................M5x12................................ 4  
24 ....... COS18-424 ............... Power On Button ................................... .......................................... 1  
25 ....... COS18-425 ............... Power Off Button................................... .......................................... 1  
26 ....... COS18-140 ............... Tube Fittings (L type).............................1/8"x 6.............................. 1  
27 ....... COS18-427 ............... On/Off Air Control Switch ......................VM104 ............................... 1  
28 ....... COS18-215 ............... Tube Fittings (T type).............................1/8"x 6.............................. 1  
29 ....... COS18-429 ............... Guider Seat ........................................... .......................................... 1  
30 ....... TS-1482031 ............... Hex Cap Screw......................................M6x16................................ 3  
32 ....... TS-1490051 ............... Hex Cap Screw......................................M8x30................................ 2  
33 ....... TS-2361081 ............... Lock Washer .........................................M8 ..................................... 2  
34 ....... COS18-434 ............... Limit Switch........................................... .......................................... 1  
35 ....... COS18-317 ............... Tube Fittings (L type).............................1/4”x 6 .............................. 2  
36 ....... COS18-436 ............... Silencer .................................................1/4” .................................... 1  
37 ....... TS-2235991................ Socket Head Cap Screw........................M5x100.............................. 1  
38 ....... COS18-438L............... Bracket (Left Hand)................................ .......................................... 1  
38 ....... COS18-438R.............. Bracket (Right Hand) ............................. .......................................... 1  
39 ....... COS18-439 ............... Spring Housing...................................... .......................................... 1  
40 ....... COS18-440 ............... Spring.................................................... .......................................... 1  
41 ....... TS-1540031 ............... Hex Nut .................................................M5x0.8P ............................ 2  
42 ....... TS-1501091 ............... Socket Head Cap Screw........................M4x35................................ 2  
43 ....... TS-1550021................ Flat Washer...........................................M4 ..................................... 2  
44 ....... TS-1540021................ Hex Nut .................................................M4x0.7P ............................ 2  
45 ....... TS-1481021................ Hex Cap Screw......................................M5x10................................ 6  
46 ....... TS-1550031................ Flat Washer...........................................M5 ..................................... 2  
47 ....... TS-1503041................ Socket Head Cap Screw........................M6x16................................ 2  
48 ....... COS18-448 ................ Bracket.................................................. .......................................... 1  
49 ....... COS18-449 ................ Bracket.................................................. .......................................... 1  
52 ....... COS18-452 ................ Special Rubber Head Screw ..................W1/4"x25........................... 2  
28  
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PARTS LIST: Safety Guard Assembly (COS18 Cut-Off Saw) continued  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
53........TS-1540041 ................Hex Nut................................................. M6x1P................................4  
54........COS18-454L...............Pneumatic Guard (Left Hand)................ ...........................................1  
54........COS18-454R ..............Pneumatic Guard (Right Hand) ............. ...........................................1  
55........COS18-455L...............Safety Cover (Left Hand) ...................... ...........................................1  
55........COS18-455R ..............Safety Cover (Right Hand) .................... ...........................................1  
58........COS18-207.................Rubber Sleeve ...................................... ...........................................1  
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Safety Guard Assembly – Left Hand (COS18 Cut-Off Saw)  
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Safety Guard Assembly – Right Hand (COS18 Cut-Off Saw)  
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PARTS LIST: 4' Roller Table Assembly (COS18 Cut-Off Saw) #6827038  
Optional Accessory  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1 ......... COS18-501 ..............Roller Table ............................................4’........................................ 1  
2 ......... COS18-502 ..............Roller ...................................................... .......................................... 5  
3 ......... COS18-503 ..............Split Pin .................................................. ........................................ 10  
4 ......... TS-1490021 ..............Hex Cap Screw.......................................M8x16................................ 8  
5 ......... TS-1550051...............Flat Washer ............................................M8 ..................................... 8  
6 ......... COS18-506 ..............Bracket.................................................... .......................................... 1  
9 ......... TS-1540061 ..............Hex Nut...................................................M8x1.25P .......................... 6  
10 ....... COS18-510 ..............Leg.......................................................... .......................................... 1  
14 ....... TS-0561071 ..............Hex Nut...................................................5/8”-11 ............................... 2  
15 ....... COS18-515 ..............Adjusting Foot.........................................5/8" .................................... 2  
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4' Roller Table Assembly (COS18 Cut-Off Saw) #6827038 Optional Accessory  
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PARTS LIST: 8' Roller Table Assembly (COS18 Cut-Off Saw) #6827037  
Optional Accessory  
Index Part  
No.  
No.  
Description  
Size  
Qty.  
1 ......... COS18-601 ..................Guide Rail............................................8’........................................ 1  
2 ......... COS18-602 ..................Scale....................................................2400mm............................. 1  
3 ......... COS18-603 ..................Pan Head Machine Screw....................M5x5.................................. 2  
4 ......... TS-1550031..................Flat Washer .........................................M5 ..................................... 2  
5 ......... COS18-605 ..................Guide Body.......................................... .......................................... 3  
6 ......... COS18-606 ..................Square Head Bolt.................................M8x40…………………….....6  
7 ......... COS18-607 ..................Lock Handle......................................... .......................................... 6  
8 ......…TS-1550051..................Flat Washer .........................................M8 ................................... 24  
9 ......... COS18-609 ..................Guide Stopper...................................... .......................................... 3  
10 ....... COS18-610 ..................Spring Pin............................................ 3x30................................ 3  
11 ....... COS18-611 ..................Square Head Bolt.................................M8x27................................ 6  
13 ....... TS-1540061..................Hex Nut................................................M8x1.25P ........................ 19  
14 ....... TS-1490041..................Hex Cap Screw....................................M8x25................................ 3  
16 ....... COS18-616 .................Roller Table .........................................8’........................................ 1  
17 ....... COS18-502 .................Roller................................................... ........................................ 11  
18 ....... COS18-503 .................Split Pin ............................................... ........................................ 22  
19 ....... TS-1490021..................Hex Cap Screw....................................M8x16.............................. 12  
21 ....... COS18-506 ..................Bracket ................................................ .......................................... 1  
25 ....... COS18-510 .................Leg....................................................... .......................................... 2  
29 ....... TS-0561071 .................Hex Nut................................................5/8”-11 ............................... 4  
30 ....... COS18-515 ..................Adjusting Foot......................................5/8" .................................... 4  
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8' Roller Table Assembly (COS18 Cut-Off Saw) #6827037 Optional Accessory  
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PARTS LIST: Pneumatic Diagram (COS18 Cut-Off Saw)  
Index Part  
No.  
No.  
Description  
Size  
1 ......... COS18-211 ................ Emergency Button.................................  
2 ......... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
3 ......... COS18-215 ................ Tube Fittings (T type).............................1/8"x 6  
4 ......... COS18-214 ................ Air Pressure Start Button .......................  
5 ......... COS18-215 ................ Tube Fittings (T type).............................1/8"x 6  
6 ......... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
7 ......... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
8 ......... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
9 ......... COS18-322 ................ Jointer Block..........................................1/8”  
10 ....... COS18-323 ................ Jointer ...................................................1/8”x1/8”  
11 ....... COS18-322 ................ Jointer Block..........................................1/8”  
12 ....... COS18-215 ................ Tube Fittings (T type).............................1/8"x 6  
13 ....... COS18-323 ................ Jointer ...................................................1/8”x1/8”  
14 ....... COS18-320 ................ Tube Fittings (I type)..............................1/4”x 10  
15 ....... COS18-320 ................ Tube Fittings (I type)..............................1/4”x 10  
16 ....... COS18-312 ................ Connector..............................................  
17 ....... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
18 ....... COS18-141 ................ Silencer .................................................1/8”  
19 ....... COS18-325 ............... Tube Fittings (L type).............................1/4”x 10  
20 ....... COS18-141 ................ Silencer .................................................1/8”  
21 ....... COS18-312 ................ Connector..............................................  
22 ....... COS18-317 ................ Tube Fittings (L type).............................1/4”x 6  
23 ....... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
24 ....... COS18-141 ................ Silencer .................................................1/8”  
25 ....... COS18-319 ................ Tube Fittings (T type).............................1/4”x 6  
26 ....... COS18-141 ................ Silencer .................................................1/8”  
27 ....... COS18-140 ................ Tube Fittings (L type).............................1/8"x 6  
28 ....... COS18-204 ................ Pedal Switch..........................................230-8A  
29 ....... COS18-206 ................ Silencer .................................................1/4”  
30 ....... COS18-205 ................ Tube Fittings (I type)..............................1/4"x 6  
31 ....... COS18-205 ................ Tube Fittings (I type)..............................1/4"x 6  
32 ....... COS18-330 ................ Cylinder.................................................CB-50*230  
33 ....... COS18-332 ................ Air Regulator .........................................3/8”  
34 ....... COS18-234 ................ Tube Fittings (L type).............................3/8”x 10  
35 ....... COS18-331 ................ Jointer ...................................................1/4"x3/8"  
36 ....... COS18-332 ................ Air Regulator .........................................3/8”  
37 ....... COS18-234 ................ Tube Fittings (L type).............................3/8”x 10  
38 ....... COS18-331 ................ Jointer ...................................................1/4"x3/8"  
39 ....... COS18-317 ............... Tube Fittings (L type).............................1/4”x 6  
40 ....... COS18-436 ............... Silencer .................................................1/4”  
41 ....... COS18-434 ............... Limit Switch...........................................  
42 ....... COS18-317 ............... Tube Fittings (L type).............................1/4”x 6  
43 ....... COS18-140 ............... Tube Fittings (L type).............................1/8"x 6  
44 ....... COS18-427 ............... On/Off Air Control Switch ......................  
45 ....... COS18-215 ............... Tube Fittings (T type).............................1/8"x 6  
46 ....... COS18-228(R/L)......... Air Filter (Oil Type)................................MACP300-10A  
47 ....... COS18-212 ................ Quick Fittings.........................................1/4”  
48 ....... COS18-229 ................ Ball valve ..............................................1/4”  
49 ....... COS18-233 ................ Connection Block...................................3/8”  
36  
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PARTS LIST: Pneumatic Diagram (COS18 Cut-Off Saw) continued  
Index Part  
No.  
No.  
Description  
Size  
50........COS18-235.................Tube Fittings (L type) ............................ 3/8”x 6  
51........COS18-234.................Tube Fittings (L type) ............................ 3/8”x 10  
52........COS18-141.................Silencer................................................. 1/8"  
53........COS18-140.................Tube Fittings (L type) ............................ 1/8"x 6  
54........COS18-140.................Tube Fittings (L type) ............................ 1/8"x 6  
55........COS18-139.................Limit Switch...........................................  
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ELECTRICAL SCHEMATIC (COS18 Cut-Off Saw)  
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Preventive Maintenance  
Checklist for Model COS18 Cut-Off Saw  
[
[
[
[
] Work area around machine marked off clearly.  
] Non-skid floor strips in area where operator normally stands.  
] Inspect entire machine for loose bolts, nuts, screws. Tighten and replace as necessary.  
] Clean table area, removing sawdust and chips with a soft bristle brush. Remove gum and pitch  
with oven cleaner.  
[
[
] Lubricate appropriate places with a good grade non-hardening grease.  
] Clean table and fence surface. If rusted, use paste mixture of household ammonia, a good commercial  
detergent and 000 steel wool. Wash surface down with hot, soapy water, rinse and dry thoroughly.  
Coat surface with talcum powder, rubbing briskly into surface with a clean blackboard eraser.  
[
[
[
[
[
[
[
[
] Check blade condition; should be sharp and free of nicks or grooves.  
] Check belt condition. Replace as needed. Dress with belt dressing. Check belt tension.  
] Check motor for loose wiring and sawdust congestion, pulleys tight and in line.  
] Check bearings. Replace any bad or suspect bearings immediately.  
] Fence properly aligned and square.  
] Foot pedal has proper adjustment.  
] Check electrical controls function and pneumatic guard operation.  
] Check alignment of roller tables with main table.  
To order parts or reach our service department, please call our toll-free number between 8:00 a.m. and 4:30  
p.m. (CST), Monday through Friday. Having the Model Number and Serial Number of your machine available  
when you call will allow us to serve you quickly and accurately. Locating the stock number of the part(s)  
required from your parts manual will also expedite your order.  
Phone No.: (800) 248-0144  
Fax No.  
(800) 274-6840  
If you are calling from Canada, please call 800-238-4746  
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WMH Tool Group  
427 Sanford Road  
LaVergne, TN 37086  
Phone:(800) 248-0144  
Fax: (800) 274-6840  
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