Operating Instructions and Parts Manual
20-Inch x 20-Inch Semi Automatic
Horizontal Cut-Off Band Saw
Model: J-7060
WHM TOOL GROUP, Inc.
427 New Sanford Road
LaVergne, Tennessee 30786
Ph.: 800-274-6848
Part No. M-414476
Revision A2 03/09
Copyright © 2009 WMH Tool Group, Inc.
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Table of Contents
Cover Page........................................................................................................................... 1
General Specifications .......................................................................................................... 4
Operating Precautions .......................................................................................................... 5
Operating Instructions........................................................................................................... 7
Blade Selection/Break-in Procedures.................................................................................... 9
Work Set-up ....................................................................................................................... 10
Adjustments .........................................................................................................................11
Maintenance ....................................................................................................................... 14
Wiring Diagram ................................................................................................................... 19
Troubleshooting .................................................................................................................. 20
Replacement Parts ............................................................................................................. 22
3
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General
Specifications
The JET J-7060 Semi-Automatic Horizontal Cut-Off
Band Saw incorporates a number of exclusive design
features and innovations to make this saw a powerful
and productive addition to machine shops, mainte-
nance shops, tool rooms, and fabrication and welding
shops. The exclusive swivel control panel allows the
operator access to all machine controls from any side
of the machine. The exclusive 6-point contact blade
guide assemblies give the machine greater accuracy
and longer blade life. The rapid acting, patented, 3-
jaw vise provides simple, fast, and accurate set-ups
for both straight and miter cuts. In addition, the semi-
automatic cycle enables the operator to initiate, with
the push of a button, the following steps: blade start,
saw head frame down, blade stop, and saw head
frame up. This completely versatile band saw is a
proven time saver, offering optimum sawing perfor-
mance.
Specifications
Model
J-7060
Stock Number
414476
Cutting Capacity
At 90 degrees
At 45 degrees
12 inches Round/12 x 35 inches Rectangle
12 inches Round/12 x 12 inches Rectangle
4
Blade Size
1 x 0.035 x 156 inches
Blade Wheel Diameter
Blade Speeds
17 inches Diameter, Cast Iron
82 to 262 SFPM, Variable Speed
Motor
3 HP, 3 Phase, 230/460 Volts
87 x 31.5 x 53 Inches
Dimensions
Net Weight
Shipping Weight
1,144 pounds
1,279 pounds
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- Misuse of this machine can cause serious injury.
- For safety, machine must be set up, used and
serviced properly.
-Always follow instructions in Operating Instruc-
tions and Parts Manual when changing acces-
sory tools or parts.
- Read, understand and follow instructions in the
Operating Instructions and Parts Manual which
was shipped with your machine.
- Never modify the machine without consulting
JET Corporation.
You - the Stationary Power Tool User - Hold
the Key to Safety.
When Setting up Machine:
- Always avoid using machine in damp or poorly
lighted work areas.
- Always be sure the machine support is se-
curely anchored to the floor or the work bench.
When Using Machine:
- Always wear safety glasses with side shields
(See ANSI Z87.1)
- Never wear loose clothing or jewelry.
- Never overreach - you may slip and fall.
When Servicing Machine:
Read and follow these simple rules for best results
and full benefits from your machine. Used properly,
JET’s machinery is among the best in design and
safety. However, any machine used improperly can
be rendered inefficient and unsafe. It is absolutely
mandatory that those who use our products be
properly trained in how to use them correctly. They
should read and understand the Operating Instruc-
tions and Parts Manual as well as all labels affixed to
the machine. Failure in following all of these warn-
ings can cause serious injuries.
- Always disconnect the machine from its electri-
cal supply while servicing.
Machinery General Safety Warnings
1. Always wear protective eye wear when
operating machinery. Eye wear shall be
Whenever changing accessories or general
maintenance is done on the machine, electri-
cal power to the machine must be discon-
nected before work is done.
impact resistant, protective safety glasses with
side shields which comply with ANSI Z87.1
specifications. Use of eye wear which does
not comply with ANSI Z87.1specifications
could result in severe injury from breakage of
eye protection.
2. Wear proper apparel. No loose clothing or
jewelry which can get caught in moving parts.
Rubber soled footwear is recommended for
best footing.
9. Maintain all machine tools with care. Follow
all maintenance instructions for lubricating and
the changing of accessories. No attempt shall
be made to modify or have makeshift repairs
done to the machine. This not only voids the
warranty but also renders the machine unsafe.
10. Machinery must be anchored to the floor.
11. Secure work. Use clamps or a vise to hold
work, when practical. It is safer than using
your hands and it frees both hands to operate
the machine.
3. Do not overreach. Failure to maintain proper
working position can cause you to fall into the
machine or cause your clothing to get caught
pulling you into the machine.
5
12. Never brush away chips while the machine is
inoperation.
4. Keep guards in place and in proper working
order. Do not operate the machine with guards
13. Keep work area clean. Cluttered areas invite
accidents.
14. Remove adjusting keys and wrenches before
turning machine on.
15. Use the right tool. Don’t force a tool or attach-
ment to do a job it was not designed for.
16. Use only recommended accessories and
follow manufacturers instructions pertaining to
them.
re
moved.
5. Avoid dangerous working environments. Do
not use stationary machine tools in wet or
damp locations. Keep work areas clean and
well lit.
6. Avoid accidental starts by being sure the start
switch is OFF before plugging in the ma-
chine.
7. Never leave the machine running while unat-
tended. Machine shall be shut off whenever it
is not in operation.
17. Keep hands in sight and clear of all moving
parts and cutting surfaces.
18. All visitors should be kept at a safe distance
8. Disconnect electrical power before servicing.
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19. Know the tool you are using — its application,
limitations, and potential hazards.
from the work area. Make the workshop com-
pletely safe by using padlocks, master
switches, or by removing starter keys.
General Electrical Cautions
Caution: For circuits which are far away from the
electrical service box, the wire size must be in-
creased in order to deliver ample voltage to the motor.
To minimize power losses and to prevent motor
overheating and burnout, the use of wire sizes for
branch circuits or electrical extension cords accord-
ing to the following table is recommended.
This saw should be grounded in accordance with
the National Electrical Code and local codes and
ordinances. This work should be done by a qualified
electrician. The saw should be grounded to protect
the user from electrical shock.
Wire Sizes
Conductor Length
AWG (American Wire Gauge) Number
240 Volt Lines
No. 14
120 Volt Lines
No. 14
0 - 50 Feet
50 - 100 Feet
Over 100 Feet
No. 14
No. 12
No. 12
No. 8
Safety Instructions on Sawing Systems
8. Bring adjustable saw guides and guards as close
1. Always wear leather gloves when handling saw
blade. The operator shall not wear gloves when
operating the machine.
2. All doors shall be closed, all panels replaced, and
other safety guards in place prior to the machine
being started or operated.
3. Be sure that the blade is not in contact with the
workpiece when the motor is started. The motor
shall be started and you should allow the saw to
come up to full speed before bringing the saw
blade into contact with the workpiece.
4. Keep hands away from the blade area. See
Figure A.
5. Remove any cut off piece carefully while keeping
your hands free of the blade area.
6. Saw must be stopped and electrical supply must
be cut off before any blade replacement or
adjustment of blade support mechanism is done,
or before any attempt is made to change the
drive belts or before any periodic service or
maintenance is performed on the saw.
as possible to the workpiece.
9. Always wear protective eye wear when operating,
servicing, or adjusting machinery. Eyewear shall
be impact resistant, protective safety glasses
with side shields complying with ANSI Z87.1
specifications. Use of eye wear which does not
comply with ANSI Z87.1 specifications could
result in severe injury from breakage of eye
protection. See Figure B.
10. Nonslip footwear and safety shoes are recom-
mended. See Figure C.
11. Wear ear protectors (plugs or muffs) during
extended periods of operation. See Figure D.
12. The workpiece, or part being sawed, must be
securely clamped before the saw blade enters
the workpiece.
13. Remove cut off pieces carefully, keeping hands
away from saw blade.
14. Saw must be stopped and electrical supply cut
off or machine unplugged before reaching into
cutting area.
6
7. Remove loose items and unnecessary
workpieces from area before starting machine.
15. Avoid contact with coolant, especially guarding
your eyes.
B
D
C
A
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Introduction
Operating Instructions
This manual includes operating and maintenance
instructions for the JET 12-inch by 20-inch Cut Off
Band Saw, Model J-7060. This manual also includes
parts listings and illustrations of replaceable parts.
Controls
The operating controls for the saw are provided in a
control panel on the left side of the machine. The
control panel is mounted on a pivoting tube. The
pivoting tube allows the operator to position the
control panel in a convenient location.
Cut-Off Saw Features
Refer to Figure 1 and 2 for cut-off saw features
Blade Wheel Cover
Power-on
Light
Blade Guide Supports
Saw Head Up
Saw Head Down
Blade
Control
Panel
Speed
Control
0
1
10
9
2
Start
Switch
8
3
Feed Rate
Knob
4
7
5
6
0
Stop
Switch
Coolant Sump
Access Panel
Blade Guides
Capped Openings
(Non-functional)
Saw
Blade
Coolant
Overflow
Coolant
Temperature
Emergency Stop
Coolant Pump Switch
Base
Figure 1: Saw Features (Front View)
Figure 3: Control panel
Hydraulic
Cylinder
Blade
The upper row of controls include the following:
1. Power On light indicates when power is con-
nected to the machine.
2. Saw Head Up pushbutton is used to raise the
head.
Saw
Head
Tension
Handwheel
Vise
Handwheel
3. Saw Head Down pushbutton is used to lower the
head onto the workpiece.
Drive
Motor
The center row of controls include the following:
1. Start pushbutton is used to start the saw blade
drive motor and the hydraulic pump motor. The
hydraulic pump provides the hydraulic pressure
required to raise and lower the saw head.
Coolant
Pump
Access
Panel
Hydraulic Pump
and Reservoir
Electrical
Panel
Work Table
2. Feed Rate control is used to set the rate at which
the blade feeds through the workpiece.
7
Figure 2: Saw Features (Rear View)
Variable SpeedAdjustment From
25 MPM TO 75 MPM
Recommended Speed for Cutting Various Materials
SPEED/MPM
Material To Be Cut
25
Tool Steel, Stainless Steel, Alloy Steel, Phosphor
Bronze, Hard Bronze, Hard Cast Iron, Malleable Iron.
Mild Steel, Soft Cast Iron, Medium Hard
Brass, Medium Hard Bron
40
50
75
Soft Brasses and Bronzes, Hard Aluminum, Plastics
Plastics, Soft and Medium Soft Aluminum,
Wood, Other Light Materials
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The bottom row of controls include the following:
1. Stop pushbutton is used to stop the saw blade
drive motor.
2. Emergency stop pushbutton is used to quickly
disconnect electrical power to the machine.
3. Coolant On/Off selector switch is used to start
and stop the coolant pump motor.
WARNING: TO CHANGE SPEED, THE SAW
MOTOR MUST BE OPERATING.
5. Turn the speed adjustment knob to the desired
rate setting as determined by the material being
cut.
Raising/Lowering the Saw
Head
1. To raise the saw head, press the Saw Head Up
pushbutton. The saw head will raise until the
upper limit switch (refer to Figure 4) trips.
2. To lower the saw head, press the Saw Head
Down pushbutton. The saw head will lower until
the lower limit switch trips.
3. When the saw head is being lowered to cut a
workpiece, the saw blade drive motor must be
started before lowering the blade against the
workpiece. Set the coolant pump selector to the
on ( I ) position If coolant is required by the
material being cut.
Other Controls
Refer to Figures 1 and 2 for location of the following
controls:
1. Drive motor speed control: used to set drive
motor speed in meters per minute.
2. Blade guide support adjustment: used to set
distance between the saw blade guide bearing as
required by the size of the workpiece.
3. Blade tensioning hand wheel: use to tighten the
saw blade on the drive and idler wheels.
4. Vise clamping hand wheel: used to tighten the
vise jaws against the workpiece.
Upper
Limit
Switch
Setting Blade Speed
1. The blade speed is controlled by an adjustment
mechanism on the right end of the saw. Speed
increases when the adjustment knob is turned
counterclockwise. Speed decreases when the
knob is turned clockwise.
2. A placard on the drive belt guard (shown below)
provides recommended speeds for various
materials.
Lock
Handle
Scale
3. A speed indicator is provided on the barrel of the
adjustment mechanism. The indicator provides
speed indications in feet per minute and meters
per minute. (The meters per minute values are
shown in parenthesis on the indicator.) The
graduations are:
Hydraulic
Cylinder
Lower
Limit
Switch
8
Feet per Minute Meters per Minute
70
(21)
(30)
(40)
(48)
Lower
Limit
Stop
100
130
160
Figure 4: Limit Switches
4. The feed rates on the placard are expressed in
meters per minute. The feed rate graduations
available on the indicator may not match the
recommended feed rate. An approximate speed
may therefore be required. For example, to set a
speed rate of 25 meters per minute, the indicator
would be set about midway between 21 meters-
per-minute and the 30 meters-per-minute gradu-
ations.
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appropriate for many shop cutting needs, do not
encompass the wide variety of blades of special
configuration (tooth pitch and set) and special alloys
for cutting unusual or exotic materials.
A coarse blade could be used for a solid steel bar
but a finer tooth blade would be used on a thin-wall
tube. In general, the blade choice is determined by
the thickness of the material; the thinner the material,
the finer the tooth pitch.
A minimum of three teeth should be on the work
piece at all times for proper cutting. The blade and
workpiece can be damaged if the teeth are so far
apart that they straddle the workpiece.
Controlling the Cut:
Hydraulic Feed Control
The weight of the saw arm provides all the force
needed to move the saw blade through the workpiece.
In fact, if the full weight of the arm is allowed to make
the cut, rapid blade wear and poor cutting accuracy
will result. Ahydraulic feed control is provided on the
control panel to provide the operator with a means to
control the speed and efficiency of the cutting opera-
tion.
For very high production on cutting of special
materials, or to cut hard-to-cut materials such as
stainless steel, tool steel, or titanium, you can ask
your industrial distributor for more specific blade
recommendations. Also, the supplier who provides
the workpiece material should be prepared to provide
you with very specific instructions regarding the best
blade (and coolant or cutting fluid, if needed) for the
material and shape supplied.
The hydraulic cylinder is attached to the saw base
and the saw head. Hydraulic pressure is provided to
both sides of the hydraulic cylinder piston to raise
and lower the saw head. The feed rate control on the
control panel determines the rate at which the saw
head is raised or lowered.
The amount of downward force can be controlled
by using the feed rate control valve. When the valve
is opened slightly, the saw head will move downward.
The further the valve is opened, the faster the saw
head will move downward.
The feed control is adjusted by the operator to
maintain cutting efficiency. This is usually deter-
mined by observing the chip formation. (See Evalu-
ating Blade Efficiency for more information on cutting
efficiency.)
Blade Break-in Procedures
New blades are very sharp and, therefore, have a
tooth geometry which is easily damaged if a careful
break-in procedure is not followed. Consult the blade
manufacturer’s literature for break-in of specific
blades on specific materials. However, the following
procedure will be adequate for break-in of JET-
supplied blades on lower alloy ferrous materials.
1. Clamp a round section workpiece in the vise. The
workpiece should be 2 inches or larger in diam-
eter.
Evaluating Cutting Efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by the
cutting blade.
If the chip formation is powdery, then the feed rate
is much too light, or the blade is dull.
If the chips formed are curled, but colored — that
is, either blue or straw-colored from heat generated
during the cut — then the feed rate is too high.
If the chips are slightly curled and are not colored
by heat — the blade is sufficiently sharp and is
cutting at its most efficient rate.
2. Set the saw on low speed. Start the cut with a
very light feed rate.
3. When the saw has completed 1/3 of the cut,
increase the feed rate slightly and allow the saw
to complete the cut.
4. Keep the same hydraulic cylinder setting and
begin a second cut on the same or similar
workpiece.
5. When the blade has completed about 1/3 of the
cut, increase the feed rate. Watch the chip
formation until cutting is at its most efficient rate
and allow the saw to complete the cut (see
Evaluating Blade Efficiency). The blade is now
considered ready for regular service.
9
Blade Selection
The cut-off saw is provided with a saw blade that is
adequate for a variety of cut-off jobs on a variety of
common materials. A4/6 vari tooth bi-metal blade
(5512107) and a 6/10 vari tooth bi-metal blade
(5512108) are available from JET.
See Setting Blade Speed for the speeds recom-
mended for various materials. These selections, while
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Set Workpiece
Against Corner
of Right
Angle
Setting
Block
Work Set-up
Vise Jaw
Securing the Workpiece for
Left
Vise
Jaw
Square Cuts
1. Raise the saw head.
(see figure 5)
Pivot
Screw
Angle
Locking
Screw
2. Slide the left vise jaw far enough to the left to allow
the workpiece to be placed in the vise.
3. Place the workpiece on the work table. If the
workpiece is long, provide support at the other
end. It may also be necessary to provide addi-
tional downward clamping to hold the workpiece
securely on the work table.
4. Turn clamping hand wheel clockwise to clamp the
workpiece in position against the fixed (right) vise
jaw.
Figure 6: Adjusting vise
Angle Block
Locking Handle
5. After completing the cut, turn the clamping hand
wheel counterclockwise and slide the left jaw away
from the workpiece.
Angle
Pointer
Clamping
Hand
Wheel
Figure 7: Angle setting block
Saw Head
Left Vise Jaw
Work Table
Installation and Adjustment of
Work Stop
The work stop is used to set up the saw for
making multiple cuts of the same length (see figure
8). Install and adjust the work stop as follows:
Figure 5: Securing workpiece
Stop Post
Adjusting the Vise for Angle
Locking Lever
Cuts
(see figure 6)
"Wing" Screw
Stop L-Bracket
1. Loosen the angle locking screw and the pivot
screw on the left vise jaw.
10
2. Turn the locking handle on the round, angle-
setting block counterclockwise to unlock the block.
Slide the block until the pointer on the block is
aligned with desired angle (see figure 7). Tighten
the locking handle to set the angle.
Knob
Stop Rod
Figure 8: Work stop
3. Set the workpiece in the vise. Put the front end of
the workpiece against the corner of the right vise
jaw. Put the rear end of the workpiece against the
angle-setting block.
1. Insert the end of the stop rod in the hole in the
front right side of the work table.
2. Tighten the “wing” screw to secure the rod in
place.
4. Turn clamping hand wheel clockwise until the left
vise jaw is parallel with the workpiece. Tighten the
pivot screw and angle locking screw on the left
vise jaw. Clamp the workpiece in position.
5. After completing the cut, turn the clamping hand
wheel counterclockwise and slide the left jaw away
from the workpiece.
3. Install the stop post in the channel on the back of
the stop L-bracket. Install the locking lever in the
threaded hole in the stop post. Snug-up the
locking lever.
4. Install the locking knob in the hole in the side of
the stop L-bracket.
5. Slide the assembled stop L-bracket onto the stop
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rod. Position the stop post against the work piece
and tighten the knob in the stop L-bracket. The
stop post can be moved left or right as required to
place the stop post against the work piece.
Coolant Flow
CAUTION: THE COOLANT PUMP MUST BE SUB-
MERGED BEFORE OPERATING TO PREVENT
DAMAGE TO THE PUMP.
Starting the Saw
WARNING: NEVER OPERATE THE SAW WITH-
OUT BLADE COVERS IN PLACE AND SECURED.
1. The blade guides are fitted with coolant fittings.
Coolant is provided to the fittings through intercon-
necting tubing. The coolant is dispensed directly
onto the saw blade.
2. Adjust the coolant flow valves on the top, rear of
the saw head as required to provide the desired
flow. The flow should be no more than the blade
can draw into the workpiece by movement of the
blade.
CAUTION: MAKE SURE THE BLADE IS NOT IN
CONTACT WITH THE WORKPIECE WHEN THE
MOTOR IS STARTED. DO NOT DROPTHE SAW
HEAD ON THE WORKPIECE OR FORCE THE SAW
BLADE THROUGH THE WORKPIECE.
3. The coolant flow can be stopped in two ways:
1) By using the coolant pump switch on the
electrical equipment box, or
1. Raise the saw head.
2. Clamp the workpiece in the vise. (See figure 9 for
examples of workpieces in the vise.)
3. Be sure to start the saw blade drive motor before
allowing the blade to contact the workpiece.
4. Start the motor and allow the saw to come up to
speed.
2) By closing the coolant flow valves on the top,
rear of the saw head.
Coolant Mixture and Quantity
The general purpose coolant is a mixture of water
soluble oil and water. Mix one part of soluble oil
(TRIM SOL) to ten parts of water (one quart oil, ten
quarts of water). The eleven quarts of coolant is the
amount required for the coolant pump to operate
properly.
There are numerous coolants on the market that
are formulated for special applications. Consult your
local distributor for details in the event you have a
long range production task, or are required to cut
some of the more exotic materials.
5. Slowly bring the saw down onto the workpiece.
Adjust feed rate using feed rate control.
6. DO NOT LOWER THE SAW HEAD AT A RATE
FASTER THAN THE SAW’S CAPABILITY OR
FORCE THE CUT. Adjust the feed rate so the
hydraulic cylinder provides the proper amount of
downward force.
7. The saw will automatically shut off at the end of
the cut.
Rounds
Adjustments
The efficient operation of the cut-off saw is
dependent upon the condition of the saw blade. If the
performance of the saw begins to deteriorate, the first
item that you should check is the blade.
Flats/strips
Knock off
f
f
sharp edge
here with
ffile
11
If a new blade does not restore the machine’s
cutting accuracy and quality, refer to the Trouble-
shooting section (or the blade manufacturer’s guide)
for conditions to consider and adjustments that can
be made to increase the life of the blade.
Angles
Channels
I-Beams
To change the blade, refer to Changing Blades in
the Maintenance section. To adjust the blade track-
ing, refer to the following procedures.
Squares/rectangles
f
Knock off
sharp edge
here with
file
Blade Tracking Adjustment
Blade tracking has been tested at the factory. Adjust-
ment is rarely required when the blade is used
properly or if the blade is correctly welded. (See
figure 10 for location of blade tracking adjustment
f
Hexagonals
Tees
Figure 9: Placing workpieces in the vise
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8. Turn the single hex adjustment screw to stop the
motion of the blade on the wheel as it gets closer
to the wheel shoulder. Put a 6-inch length of
paper between the blade and the wheel as shown
in figure 11. The paper should not be cut as it
passes between the wheel shoulder and the blade.
9. Turn the single hex adjustment screw a small
amount. Repeat the insertion of the paper
between the wheel shoulder and the blade until the
paper is cut in two pieces.
NOTE: You may have to repeat the check with the
paper several times before the blade and the shoulder
cuts the paper into two pieces. Do not hurry the
adjustment. Patience and accuracy here will pay off
with better, more accurate, quieter cutting and much
longer machine and blade life.
Blade Tracking
Hex Adjustment
Screws
Single
Adjustment
Screw
Center
Locking
Screws
Figure 10: Blade tracking and tensioning
screws.)
10. When the paper is cut, turn the hex adjustment
screw slightly in the counterclockwise direction.
This assures that the blade is not touching the
shoulder of the wheel.
Factory or Field Procedure
1. Raise the saw head enough to allow the saw motor
to operate.
11. Shut off the saw.
2. Loosen four knobs securing the blade cover. Lift
the cover and swing it backward.
3. Remove the blade guard mounted on the left blade
guide support.
4. Remove both blade guide bearing brackets.
NOTE: Maintain proper tension at all times using the
blade tensioning mechanism.
5. Loosen the center locking screws in all three hex
adjustment screws on the blade tensioning
mechanism (see figure 10).
12. Hold the hex adjustment screws with a wrench
and tighten the center locking screws. Make sure
the hex adjustment screws do not move while
tightening the center screws.
13. Install the two blade guide bearing brackets.
Position the guides so the bearings just touch the
blade.
14. Install the left blade guard.
15. Close the saw head cover. Tighten the four
knobs.
Motor "ON"
Upper Wheel
Rotating
CAUTION: WHILE PERFORMING THE FOLLOW-
ING, KEEP THE BLADE FROM RUBBING EXCES-
SIVELY ON THE SHOULDER OF THE WHEEL.
EXCESSIVE RUBBING WILL DAMAGE THE
WHEEL AND/OR THE BLADE.
6. Start the saw. Slowly turn the single hex adjust-
ment screw at the rear of the tracking mechanism
to tilt the idler wheel. Do not turn either of the
other two adjustment screws. Turn the adjustment
screw until the blade is touching the shoulder of
the idler wheel.
Put Strip
Between
Wheel
and
12
Blade
NOTE: Turning the screw inward causes the blade to
move toward the shoulder of the wheel. Turning the
screw outward causes the blade to move away from
the shoulder.
7. Turn the single hex adjustment screw so the blade
starts to move away from the shoulder of the
wheel — then immediately turn the single hex
adjustment screw in the other direction so the
blade stops, then moves slowly toward the shoul-
der.
Figure 11: Checking blade-to-wheel
clearance using paper strips
WARNING: KEEP FINGERS CLEAR OF THE
BLADE AND WHEEL TO AVOID INJURY.
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5. Tighten the center locking screw with an Allen 5.
5. Tighten the center locking screw with an Allen
wrench while holding the eccentric bushing in
position with the 3/4-inch wrench.
6. When the adjustment is correct, the guide
bearing should rotate freely with slight pressure
of the finger (with the blade stopped).
Blade Guide Bearing
Adjustment
Proper adjustment of the blade guide bearings is
critical to efficient operation of the cut-off saw. The
blade guide bearings are adjusted at the Factory.
They should rarely require adjustment. When
adjustment is required, adjust immediately. Failure to
maintain proper blade adjustment may cause serious
blade damage or inaccurate cuts.
7. Adjust blade-edge bearings so they just touch
the back edge of the blade (see figure 19).
Concentric Bushing
It is always better to try a new blade when cutting
performance is poor. If performance remains poor
after changing the blade, make the necessary
adjustments.
Blade Guide
Bearings
Socket Cap Screw
If a new blade does not correct the problem,
check the blade guides for proper spacing. For most
efficient operation and maximum accuracy, provide
0.001 inch clearance between the blade and the
guide bearings. The bearings will still turn freely with
this clearance. If the clearance is incorrect, the
blade may track off the drive wheel.
Eccentric
Bushing
CAUTION: CHECK THE BLADE TO MAKE SURE
THE WELDED SECTION IS THE SAME THICKNESS
AS THE REST OF THE BLADE. IF THE BLADE IS
THICKERATTHE WELD, THE GUIDE BEARINGS
MAY BE DAMAGED.
Carbide
Guides
Knurled Knob
Figure 13: Adjustment of Guide Bearing
If required, adjust the guide bearings as follows:
1. Two blade guides are used in each set of blade
guides. The inner blade guide is fixed; the outer
blade guide is adjustable. The outer blade guide
is adjusted using a knurled knob on the operator
side of the blade guide assembly.
Test Cutting to Verify
Adjustment Accuracy
1. Clamp in vise and mark top
of barstock here
2. A guide bearing is provided on the innermost
side of the saw blade. The guide bearing is
mounted on an eccentric bushing.
2. Cut off a slice of
the bar stock
3. Hold the bushing with a 3/4-inch wrench and
loosen the center locking screw with an Allen
wrench (see figure 12).
4. Position the bearing by turning the bushing. Set
the clearance at approximately 0.001 inch.
13
3. Rotate stock in vise
so mark is at bottom
4. Cut off a new
slice from the
stock
INCORRECT
CORRECT
Outer
Roller
Inner
Roller
5. Measure
here...
7. Differences between
New slice
measurements at edges
of disc should be less
than .003 inches per
inch per side of stock
diameter
Locking Screw
6. ...measure
here
Figure 12: Blade-To-Blade Guide Orientation
Figure 14: Cutting a Test
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Test cuts can be used to determine whether or not you
have adjusted the blade accurately. Use 2-inch round
bar stock to perform these test cuts, as follows:
1. With the bar stock securely clamped in the vise,
make a cut through the bar stock. (See figure 14.)
2. Mark the top of the bar stock.
3. Move the bar stock about 1/4-inch past the blade
so you can begin a second cut.
4. Rotate the bar stock 180 degrees so the mark you
made is now at the bottom of the cut.
Maintenance
Cleaning
1. Clean off any preservative on machine surfaces.
2. After cleaning, coat the machined surfaces of the
cut-off saw with a medium consistency machine
oil. Repeat the oil coating process at least every
six months.
3. Clean up accumulated saw cuttings after use.
Make sure the lead screw is kept free of saw
cuttings and other material that would cause
damage.
5. Make a cut through the bar stock.
6. Use a micrometer to measure the thickness
variation of the disk you have cut from the bar
stock. Measure at the top and bottom of the disk.
The saw blade can be considered correctly ad-
justed when the variation measure is no more than
0.012 inch across the face of the disk.
4. Clean the chip sludge from the coolant tank. The
frequency should be determined by how often the
saw is used.
Note: If you do not have a piece of 2-inch bar stock
available for a test cut, use a larger diameter test
piece rather than a smaller one. Maximum thickness
variation on any test piece should be no more than
0.003 inch, per side, per inch of stock diameter.
Lubrication
Lubricate the following components at the specified
frequencies and using the lubricants defined below:
1. Ball bearings: the bearings are lubricated and
sealed—periodic lubrication is not required.
2. Blade guide bearing: the bearings are lubricated
and sealed—lubrication is not required. Inspect
periodically.
Adjustment of Limit Switches
Adjustment of Lower Limit Switch
1. The lower limit switch is provided to shut off the
saw blade drive motor when the workpiece is cut
through. The switch causes the saw head to raise
to its uppermost stop.
3. Idler wheel bushing: the bearings are lubricated
and sealed—lubrication is not required. Inspect
periodically.
4. Lead screw bearing housing: lubricate monthly
2. To set the limit switch, loosen the jam nut on the
limit switch stop (figure15).
3. Adjust the stop as required and retighten jam nut.
(see exploded figure, page 20).
5. Lead screw: lubricate with light oil monthly (see
exploded figure, page 20).
6. Hydraulic cylinder pivot: lubricate with light oil
every 6 months (see exploded figure, page 20).
7. Blade tension screw: lubricate with grease every
6 months (see exploded figure, page 24).
8. Blade brush bearing: lubricate with light oil
monthly (see exploded figure, page 24).
9. Gear box: check oil once a year.
10. Change coolant on a frequency appropriate to
the type of coolant being used. Oil based
coolants can sour. Refer to the coolant supplier’s
instructions for change frequency.
Adjustment of Upper Limit Switch
1. The upper limit switch is provided to stop the saw
head when it reaches its uppermost stop.
2. To set the upper limit switch, loosen the clamping
knob on the limit switch support bracket. Move the
limit switch to the desired switch trip point (use the
scale on the side of the support bracket).
14
11. Coolant tank: clean every 6 months or as re-
quired.
Lower Limit Switch
12. Hydraulic oil reservoir: check oil level in oil
reservoir by periodically checking the oil level
indicator on the side of the reservoir. If oil level
is low, service reservoir (refer to Servicing
Hydraulic Oil).
Switch Follower
Lower Limit Stop
Jam Nut
Figure 15: Lower Limit Switch Stop Adjustment
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FROM THE SAW TEETH.
Servicing Hydraulic Oil
3. Turn the blade tensioning hand wheel clockwise to
relieve tension on the blade. Loosen the blade
enough to remove the blade from the idler and
drive wheels. Remove the blade from between the
blade guides.
4. Install the new blade between the blade guide
bearings and the carbide blade guides. Install the
blade over the drive and idler wheels.
WARNING: SHUT OFF ALL ELECTRICAL
POWER TO THE MACHINE
1. Remove hydraulic oil reservoir access panel.
2. Check oil level (refer to Figure 16). If level is
below the yellow (upper) line, the reservoir should
be filled.
3. Disconnect electrical power.
4. Remove reservoir fill cap.
5. Add oil until the level is at the yellow (upper) line.
Install reservoir fill cap.
6. If a significant amount of oil needed to be added,
check for oil leaks in pump components, lines,
and hydraulic cylinder. Correct source of
leakage before operating the cut off saw.
7. Connect electrical power. Raise and lower the
saw head to confirm that the saw is operating
correctly.
5. Turn the blade tensioning hand wheel counter-
clockwise to tighten the blade. Tighten the blade
until the blade tension indicator reads TBD.
6. Operate the saw at low speed and observe the
tracking of the blade. If tracking needs to be
adjusted, refer to Blade Tracking Adjustment.
7. Adjust the bearings on the upper edge of the
blade until they just contact the blade (see figure
19).
8. Check the guide bearings and the carbide guides
to make sure they are just contacting the sides of
the blade.
9. Install the left blade guard making sure there is
ample clearance with the blade.
10. Make a test cut to make sure the blade tracks
properly during operation. Adjust tracking as
required (see Blade Tracking Adjustment).
Motor
Pump
Changing the Drive Belt
Oil Fill Cap
1. Disconnect the electrical power source from the
cut-off saw to prevent any possibility of accidental
motor start-up.
2. Set the arm at the full horizontal position.
3. Remove the knob on the drive belt cover. Remove
the drive belt cover to expose the V-belt and
pulleys.
4. Remove two screws, nuts, and washers from back
of saw head support. Push on the motor support
bracket to pivot the motor upward to loosen the
tension on the belt.
Reservoir
Full Line
(Amber)
Fill Line
(Red, Oil Low)
Figure 16: Checking Hydraulic Oil Level
15
5. Remove the worn belt.
6. Put the replacement belt in the pulleys. Allow the
motor to pivot downward.
7. Install the two screws, nuts, and washers in back
of saw head support and through the motor
support bracket.
8. Install the drive belt cover. Install and tighten the
knob on the drive belt cover.
Changing Blades
WARNING: SHUT OFF ALL ELECTRICAL POWER
TO THE MACHINE.
1. Loosen four knobs securing the blade cover. Lift
the cover and swing it backward.
2. Remove the blade guard mounted to the left blade
guide support.
Replacing the Drive Motor
1. Disconnect the motor from all electrical power.
Unplug the motor if it is plugged into a socket.
Shut off the power to the branch and remove the
connection to the junction box if the motor is hard
wired to the branch.
WARNING: ALWAYS WEAR LEATHER GLOVES
WHEN HANDLING SAW BLADE TO AVOID INJURY
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2. Remove the drive belt from the drive motor pulley
(see Changing the Drive Belt).
Scale (Metric)
Scale (Inches)
3. Remove motor pulley.
4. Open the motor junction box and disconnect the
power cord wires from their terminals.
5. Remove the nuts, washers and bolts that secure
the motor to the mounting plate.
6. Installation of a new motor is a reversal of the
above steps.
Lock
Lock
Handle
Handle
Left
Guide
Support
Right
Guide
Support
Replacing the Drive Wheel
1. Remove the blade (see Changing Blades).
2. Remove the screw, spring washer, and washer
from the speed reducer shaft.
3. Pull the wheel from the speed reducer shaft.
Remove the drive key from the speed reducer
shaft.
4. Inspection: Examine drive edge and shoulder of
the wheel for damage. Replace the wheel if
damaged.
5. Install the key in the keyway in the speed reducer
shaft. Align the keyway in the wheel with the key
in the speed reducer shaft. Reinstall the wheel on
the speed reducer shaft.
Figure 17: Blade Guide Supports
1. Loosen the knob on the blade guide support and
slide the guide left or right as required. Repeat
for the other blade guide.
2. Set the blade guide supports as required to
accommodate the width/diameter of the
workpiece. The blade guides should be posi-
tioned so the guides do not contact the workpiece
as the saw head moves downward through the
workpiece.
6. Install the screw, spring washer and washer in the
end of the speed reducer shaft.
7. Install the blade (see Changing Blades).
Blade Tracking
Hex Adjustment
Screws
Replacing Idler Wheel or
Idler Bearing
Single
Adjustment
Screw
1. Remove the saw blade (see Changing Blades).
2. Remove the screw, spring washer, and washer
from the idler shaft.
3. Remove the idler wheel. Remove the bearing from
the idler wheel.
Center
Locking
Screws
4. Inspection: Examine the drive edge and shoulder
of the idler wheel for damage. Replace the wheel
if damaged.
5. Inspect bearings for damage and smooth opera-
tion, Replace if faulty.
Figure 18: Blade Guide Features
16
Replacement of Carbide
Blade Guides
(see figure 19)
6. Install the bearing in the idler wheel. Install the
idler wheel on the idler shaft.
7. Install the screw, spring washer and washer in the
idler shaft.
8. Install the blade (see Changing blades).
Guide Support
Coolant Line
Chip Brush
Adjusting the Blade Guides
The cut-off saw has adjustable blade guide supports
(see figure 17). The blade guide supports allow you
to set the blade guides for varying widths of
workpieces.
Blade Edge
Bearing (2)
Eccentric-Mounted
Guide Bearing
Adjusting Knob
Blade Guides
To make accurate cuts and prolong blade life, the
blade guide supports should be set to just clear the
workpiece to be cut.
Figure 19: Carbide Blade Guide Replacement
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1. Remove front blade guide by removing adjust-
ment knob, spring, and shaft.
2. Remove the rear blade guide by removing its
attachment screw
3. Install replacement blade guide in the rear guide
location. Secure with attachment screw.
4. Install replacement blade guide in the front guide
location. Install shaft into guide. Install spring
and adjustment knob.
2. Remove the attaching screw, spring washer and
washer. Remove and discard the brush (see
figure 20).
3. Install replacement brush and secure with screw,
spring washer and washer.
4. Close the blade cover and secure with four knobs.
5. Adjust outermost blade guide using adjustment
knob. Set the guide so it just contacts the side of
the blade.
Wire Brush
Screw and Washers
Replacement of Guide
Bearings
(see figure 19)
1. Remove the cap screw from the blade guide
bearing. Separate the bushing and cap screw
from the bearing. Discard the bearing.
NOTE: There is a light press fit between the bearing
and the bushing.
Figure 21: Wire Brush
Replacing the Coolant Pump
WARNING: DISCONNECT ELECTRICAL POWER
TO THE MACHINE BEFORE PERFORMING ANY
MAINTENANCE.
2. Install bushing in replacement bearing. Install cap
screw through bushing and into guide support.
3. Turn the eccentric bushing in the guide support
until the bearing contacts the blade.
1. Disconnect electrical power.
Replacement of Blade Edge
Bearings
1. Remove the capscrew from the blade edge
bearing being replaced and discard the bearing.
2. Insert the capscrew into the new bearing.
3. Adjust blade edge guide bearings so they just
contact the edge of the blade.
2. Remove four screws and the coolant sump cover
from the machine base (refer to Figure 21).
3. Disconnect coolant pump wiring (refer to Wiring
Data).
4. Remove coolant pump attaching screws. Re-
move the coolant pump.
(see figure 20)
5. Install replacement coolant pump and secure with
attaching screws.
6. Connect electrical wiring to coolant pump (see
Wiring Data).
Guide Support
Adjustment
Cap Screw
7. Connect electrical power. Start the machine to
check operation of the pump.
8. Install the coolant sump cover and secure with
four screws.
17
Floating Block
Cap Screw
Access Panel
Screws (4)
Blade Edge
Bearing
Access Panel
Coolant Pump
Junction Box
Figure 20: Blade Edge Bearing Replacement
Pump Screws (2)
Replacement of the Wire
Brush
1. Loosen four knobs securing the blade cover. Lift
the cover and swing it backward.
Coolant
Drain
Figure 22: Replacement of Coolant Pump
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Machine Setup
The saw delivered to you has been adjusted at the
factory. A number of test pieces have been cut using
the saw to verify the accuracy of cutting. Therefore,
the only setup operations required before releasing
the saw for service are spotting the saw and estab-
lishing the electrical connections to the motor.
Uncrating and Spotting
Spot the saw where it makes the most sense for the
operations you will probably be doing. If you are
going to be doing cut-off work on very long pieces of
stock, allow plenty of room for the stock, and the
infeed and outfeed supports. Remove the saw from
the shipping skid and discard any hold-down devices
that were used to secure the saw to the skid.
Electrical
Observe the following when connecting to the power
source. (The cut-off saw wiring diagrams are
provided in Figures 21 and 22.)
WARNING: JET RECOMMENDS THATANY WIRING
INVOLVING HARD WIRING OF THE SAW TOA
BRANCH, ORANY CHANGE OF VOLTAGE SUP-
PLIED TO THE MOTOR BE PERFORMED BYA
LICENSED ELECTRICIAN.
1. Make sure the saw is disconnected from the
power source, or that the fuses have been
removed or breakers tripped in the circuit in
which the saw will be connected. Make sure you
put a warning placard on the fuse or circuit
breaker to prevent accidental electrical shock.
2. If you are installing the motor power cord into a
receptacle, make sure to use the appropriate
plug.
18
3. If you are using hard-wired connections to a
junction box, connect the wires in the box, and
close the box.
4. Install the fuses or reset the breaker.
5. The saw is now ready for service.
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Wiring Diagram
19
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Troubleshooting
Probable cause
Suggested remedy
Fault
1. Material loose in vise.
2. Incorrect speed or feed.
1. Clamp work securely.
Excessive blade
breakage
2. Check Machinist’s Handbook for
speed/feed appropriate for the
material being cut.
3. Teeth too coarse for material.
4. Incorrect blade tension.
3. Check Machinist’s Handbook for
recommended blade type.
4. Adjust blade tension to the point
where the blade just does not slip
on the wheel.
5. Saw blade is in contact with
workpiece before the saw is
started.
5. Start the motor before placing the
saw on the workpiece.
6. Blade rubs on the wheel flange.
7. Misaligned guides.
8. Cracking at weld.
6. Adjust blade tracking.
7. Adjust guides.
8. Longer annealing cycle.
1. Blade teeth too coarse.
2. Blade speed too high.
3. Inadequate feed pressure.
1. Use a finer tooth blade.
2. Try a lower blade speed.
3. Decrease spring tension.
Premature blade
dulling
4. Hard spots in workpiece or scale 4. Increase feed pressure (hard
on/in workpiece.
spots). Reduce speed, increase
feed pressure (scale).
5. Work hardening of material
(especially stainless steel).
6. Insufficient blade tension.
7. Operating saw without pressure
on workpiece.
5. Increase feed pressure by
reducing spring tension.
6. Increase tension to proper level.
7. Do not run blade at idle in/on
material.
1. Workpiece not square with blade. 1. Adjust vise so it is square with the
Bad cuts
blade. (Always clamp work tightly
in vise.)
(out-of-square)
2. Feed pressure too fast.
3. Guide bearings not adjusted
properly.
4. Inadequate blade tension.
5. Span between the two blade
guides too wide.
2. Decrease pressure.
3. Adjust guide bearing clearance to
0.001 inch (0.002 inch maximum).
4. Gradually increase blade tension.
5. Move blade guide bar closer to
work.
20
6. Dull blade.
6. Replace blade.
7. Incorrect blade speed.
7. Check blade speed
(see Figure 3).
8. Blade guide assembly is loose.
9. Blade guide bearing assembly
loose.
8. Tighten blade guide assembly.
9. Tighten blade guide bearing
assembly.
10. Blade track too far away from
wheel flanges.
10. Adjust blade tracking.
11. Guide bearing worn.
11. Replace worn bearing.
1. Blade speed too high for feed
pressure.
1. Reduce blade speed and feed
pressure.
Bad cuts (rough)
2. Blade is too coarse.
2. Replace with finer blade.
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Troubleshooting
(Continued)
Blade is twisting
1. Blade is binding in the cut.
2. Blade tension too high.
1. Decrease feed pressure.
2. Decrease tension on blade
Unusual wear on
side/back of blade
1. Blade guides worn
2. Blade guide bearings not
adjusted.
1. Replace blade guides.
2. Adjust blade guide bearings.
3. Blade guide bearing bracket is
loose.
3. Tighten blade guide bearing
bracket.
Teeth missing/ripped
from blade
1. Blade tooth pitch too coarse for
workpiece.
1. Use blade with finer tooth pitch.
2. Feed too slow; feed too fast.
2. Increase feed pressure and/or
blade speed.
3. Workpiece vibrating.
4. Gullets loading up with chips.
3. Clamp workpiece securely.
4a. Use blade with a coarse tooth
pitch—reduce feed pressure.
4b. Brush blade to remove chips.
Motor running too hot
1. Blade tension too high.
2. Drive belt tension too high.
3. Blade too coarse for workpiece
(especially with tubular stock).
4. Blade too fine for workpiece
(especially with heavier, soft
material).
1. Reduce tension on blade.
2. Reduce tension on drive belt.
3. Use blade with fine tooth pitch.
4. Use blade with coarse tooth pitch.
5. Check speed reducer.
5. Speed reducer gears require
lubrication.
No coolant flow
1. Pump motor is burned out.
2. Screen/filter on pump is clogged.
3. Impeller is loose.
1. Replace pump.
2. Clean screen/filter.
3. Tighten impeller.
4. Coolant level too low.
4. Add coolant to reservoir.
Excessive speed
reducer noise/
vibration
1. V-belt is too tight.
1. Reset V-belt tension.
21
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Replacement Parts
This section provides exploded view illustrations that show the replacement parts for the Model J-7060 12-Inch x
20-Inch Semi-Automatic Horizontal Cut-Off Band Saw. Also provided are parts listings that provide part number
and description. The item numbers shown on the illustration relate to the item number in the facing parts listing.
Order replacement parts from:
WHM Tool Group, Inc.
427 New Sanford Road
LaVergne, Tennessee 30786
Ph.: 800-274-6848
Identify the replacement part by the part number shown in the parts listing. Be sure to include the model
number and serial number of your machine when ordering replacement parts to assure that you will receive the
correct part.
22
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23
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24
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25
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26
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27
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WMH Tool Group
427 New Sanford Road
LaVergne, Tennessee 30786
Ph: 800-274-6848
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