Harbor Freight Tools Sander 34951 User Manual

Belt/Disc  
sanDer  
Model 34951  
asseMBly anD OperatiOn instructiOns  
Due to continuing improvements, actual product may differ slightly from the product described herein.  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Visit our website at: http://www.harborfreight.com  
tO preVent seriOus injury, reaD anD unDerstanD  
all warnings anD instructiOns BefOre use.  
©
®
Copyright 1996, 2006 by Harbor Freight Tools . All rights reserved. No portion  
of this manual or any artwork contained herein may be reproduced in any shape or  
form without the express written consent of Harbor Freight Tools.  
for technical questions or replacement parts, please call 1-800-444-3353.  
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8.  
9.  
use eye anD ear prOtectiOn. Always wear ANSI-approved safety goggles.  
Use a full face mask if the work you’re doing produces metal filings, dust or wood  
chips.Wear a clean dust mask if the work creates a lot of fine or coarse dust.When  
operating for extended periods of time, use approved ear protection.  
DOn’t aBusetHe pOwer cOrD. Do not yank it to disconnect it from receptacle.  
Do not move bench-mounted or floor-standing machines with the power cord in the  
outlet. Keep cord away from heat, oil, and sharp edges.  
10.  
11.  
12.  
secure wOrK. Use clamps or a vise to hold the work if possible. It’s safer than  
using your hands and it frees both hands to operate the tool.  
DOn’t OVerreacH. Keep proper footing and balance at all times. Do not reach  
over or across machines that are running.  
MaintaintOOls witH care. Keep belt and disc clean for better and safer per-  
formance. Follow instructions for lubricating and changing accessories. Inspect tool  
cords periodically and if damaged, have them repaired by a qualified technician.  
Keep handles dry, clean, and free from oil and grease.  
13.  
14.  
DiscOnnect pOwer.Unplug when not in use, before servicing, and when chang-  
ing accessories such as blades, bits, and cutters.  
reMOVe aDjusting Keys anD wrencHes. Make it a habit to check that  
keys and adjusting wrenches are removed from the tool or machine work surface  
before plugging it in.  
15.  
16.  
17.  
aVOiD unintentiOnal starting. Be sure the switch is in the OFF position  
when not in use and before plugging in.  
stay alert. Watch what you are doing, use common sense. Don’t operate any  
tool when you are tired.  
cHecK DaMageD parts. Before using any tool, any part that appears damaged  
should be carefully checked to determine that it will operate properly and perform  
its intended function. Check for alignment of moving parts, binding of moving parts,  
breakage of parts, mounting, and other conditions that may affect its operation.  
Any part that is damaged should be properly repaired or replaced by an authorized  
service center unless otherwise indicated elsewhere in the instruction manual.Have  
defective switches replaced by a qualified technician. Don’t use the tool if switch  
does not turn on and off properly.  
18.  
19.  
replaceMent parts anD accessOries. When servicing, use only identical  
replacement parts. Only use accessories intended for use with this tool. Approved  
accessories are available from Harbor Freight Tools.  
DO nOt OperatetOOl if unDertHe influence Of alcOHOl Or Drugs.  
Read warning labels on prescriptions to determine if your judgment or reflexes are  
impaired while taking drugs. If there is any doubt, do not operate machine.  
SKU 34951  
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20.  
21.  
22.  
Keep guarDs in place. All guards and fences need to be in proper working  
order and alignment. Check before every use.  
neVer leaVe tOOl running unattenDeD. Always turn off power. Do not  
leave tool until it comes to a complete stop.  
Be cautiOus wHen sanDing wOOD tHen Metal. Combining wood dust  
and metal filings can create a fire hazard. Always clean away any wood dust before  
attempting to use the sander on metal products.  
23.  
24.  
25.  
26.  
Maintain a clearance Of 1/16Or less BetweentHetaBle anDtHe  
sanDing Belt.  
neVer wear glOVes Or HOlD tHe wOrKpiece witH a rag wHen  
sanDing.  
DO nOt sanD pieces tHat are tOO sMall tO Be safely suppOrteD  
Or HelD. Such pieces should be sanded by hand.  
warning: some dust created by power sanding, sawing, grinding, drilling,  
and other construction activities, contains chemicals known [to the state of  
california] to cause cancer, birth defects or other reproductive harm. Some  
examples of these chemicals are:  
Lead from lead-based paints  
Crystalline silica from bricks and cement or 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 spe-  
cially designed to filter out microscopic particles.  
(California Health & Safety Code § 25249.5, et seq.)  
grOunDing  
warning!  
improperly connecting the grounding wire can result in the risk of electric shock.  
check with a qualied electrician if you are in doubt as to whether the outlet is  
properly grounded. Do not modify the power cord plug provided with the tool.  
never remove the grounding prong from the plug. Do not use the tool if the  
power cord or plug is damaged. if damaged, have it repaired by a service facil-  
ity before use. if the plug will not t the outlet, have a proper outlet installed by  
a qualied electrician.  
reV 12/06  
SKU 34951  
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grOunDeD tOOls:tOOls witH tHree prOng plugs  
1.  
Tools marked with “Grounding Required” have a three wire cord and three prong  
grounding plug. The plug must be connected to a properly grounded outlet. If the  
tool should electrically malfunction or break down, grounding provides a low resis-  
tance path to carry electricity away from the user, reducing the risk of electric shock.  
(see 3-prong plug and Outlet.)  
2.  
3.  
The grounding prong in the plug is connected through the green wire inside the  
cord to the grounding system in the tool. The green wire in the cord must be the  
only wire connected to the tool’s grounding system and must never be attached to  
an electrically “live” terminal. (see 3-prong plug and Outlet.)  
Your tool must be plugged into an appropriate outlet, properly installed and grounded  
in accordance with all codes and ordinances. The plug and outlet should look like  
those in the following illustration. (see 3-prong plug and Outlet.)  
3-prong plug and Outlet  
Outlets for 2-prong plug  
DOuBle insulateD tOOls:tOOls witH twO prOng plugs  
1.  
2.  
Tools marked “Double Insulated” do not require grounding. They have a special  
double insulation system which satisfies OSHA requirements and complies with  
the applicable standards of Underwriters Laboratories, Inc., the Canadian Standard  
Association, and the National Electrical Code. (see Outlets for 2-prong plug.)  
Double insulated tools may be used in either of the 120 volt outlets shown in the  
preceding illustration. (see Outlets for 2-prong plug.)  
extensiOn cOrDs  
1.  
2.  
Grounded tools require a three wire extension cord. Double Insulated tools can  
use either a two or three wire extension cord.  
As the distance from the supply outlet increases, you must use a heavier gauge  
extension cord. Using extension cords with inadequately sized wire causes a seri-  
ous drop in voltage, resulting in loss of power and possible tool damage.  
(see table a.)  
SKU 34951  
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3.  
The smaller the gauge number of the wire, the greater the capacity of the cord. For  
example, a 14 gauge cord can carry a higher current than a 16 gauge cord.  
(see table a.)  
4.  
5.  
When using more than one extension cord to make up the total length, make sure  
each cord contains at least the minimum wire size required. (see table a.)  
If you are using one extension cord for more than one tool, add the nameplate am-  
peres and use the sum to determine the required minimum cord size.  
(see table a.)  
6.  
7.  
If you are using an extension cord outdoors, make sure it is marked with the suffix  
“W-A” (“W” in Canada) to indicate it is acceptable for outdoor use.  
Make sure your extension cord is properly wired and in good electrical condition.  
Always replace a damaged extension cord or have it repaired by a qualified electri-  
cian before using it.  
8.  
Protect your extension cords from sharp objects, excessive heat, and damp or wet  
areas.  
recOMMenDeD MiniMuM wire gauge fOr extensiOn cOrDs*  
(120 Or 240 VOlt)  
naMeplate  
aMperes  
(at full load)  
extensiOn cOrD lengtH  
25 feet  
50 feet  
75 feet 100 feet 150 feet  
0 – 2.0  
2.1 – 3.4  
3.5 – 5.0  
5.1 – 7.0  
18  
18  
18  
18  
18  
18  
18  
16  
18  
18  
16  
14  
18  
16  
14  
12  
16  
14  
12  
12  
* Based on limiting the line voltage drop to five volts at 150% of the rated amperes.  
taBle a  
syMBOlOgy  
Double Insulated  
Canadian Standards Association  
Underwriters Laboratories, Inc.  
Volts Alternating Current  
Amperes  
V~  
A
No Load Revolutions per Minute  
(RPM)  
n xxxx/min.  
0
unpacKing  
When unpacking, check to make sure that the item is intact and undamaged. If any  
parts are missing or broken, please call Harbor Freight Tools at the number shown on the  
cover of this manual as soon as possible.  
SKU 34951  
for technical questions, please call 1-800-444-3353.  
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asseMBly  
The Belt Sander is shipped almost completely assembled.The major items to be at-  
tached are the disc table (58), the belt table (31), and the sanding belt (6).(These numbers  
refer to the assembly diagram and parts list at the back of this manual.) We will refer to the  
tall part of the sander angled toward you as the front. The “on/off” switch is to your right.  
Belt table assembly  
1.  
Get out the table (31), 16mm screw (36), No. 8 washer (2), locking nut (32), knob  
(33), spring (34), and screw (36).  
2.  
3.  
Remove the cover (3) by removing the securing knob (1) and lifting up.  
The screw (36) goes on the inside; the other pieces are installed from the outside.  
The washer goes closer to the table, then the locking nut, followed by the knob,  
spring, and finally the last screw.  
4.  
5.  
The knob is used to lock the table in place when adjusting the angle.  
Do not replace the cover until the belt has been installed. This is covered below.  
Disc assembly  
Remove the cover (50).  
1.  
2.  
3.  
4.  
5.  
Remove the dust collector (59).  
Stick the sanding disc on the disc wheel (53).  
Get the disc wheel to the shaft of the motor with the hex head bolt (52).  
Replace the cover and dust collector.  
Disc table assembly  
1.  
Get out the table (58),4 x 22 pins (60), the No. 6 washers (55), and the wing nuts  
(61).  
2.  
3.  
Attach the table to the cover using the wing nuts and washers.  
Drive in the pins so that the table can “swing” for tilting.  
Miter gauge assembly  
1.  
2.  
Get out the shaft (57), scale (56), No. 6 washer (55), and fastening knob (54).  
Attach scale to shaft with washer and knob.  
SKU 34951  
for technical questions, please call 1-800-444-3353.  
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installing anD reMOVing sanDing Belts  
1.  
2.  
UNPLUG THE MACHINE FROM THE POWER SOURCE.  
Unless it has already be taken off, remove the knob (1) from the top of the  
sander. Remove the side cover (3).  
3.  
4.  
Put the belt over the upper wheel (8) and large belt wheel (29).  
Lift up on the belt tracking knob (19) and slide the belt over the lower belt  
wheel.  
5.  
1.  
Replace the cover.  
aDjusting Belt tracKing  
The belt tracking adjustment was set at the factory, so the belt should run  
true on its pulleys. If, however, the belt does run to one side or the other, or  
if you’ve just installed a new belt, you can adjust the track using the tracking  
knob (19).  
2.  
Stand at the left side of the machine, on the far side from the “on/off’ switch.  
Turn the tracking knob clockwise to move the belt away from you (your right  
when standing in front). Turn the knob counterclockwise to move the belt  
closer to you (your left from the front). This operation usually needs only a  
very slight turn of the tracking knob.  
use Of tHe BacKstOp  
1.  
2.  
3.  
The backstop (26) is made of heavy gauge steel to support the workpiece  
you’re sanding. The backstop should be no more than 1/16” away from the  
back of the sanding belt.  
If the backstop needs adjustment, there are two bolts (24) and two washers  
(25) which hold the backstop in place. To move the backstop closer to the  
belt, simply loosen these and move the backstop.  
For some operations, such as polishing or strapping, it’s advisable to remove  
the backstop entirely by unscrewing the two bolts, two washers, and the  
backstop itself.  
SKU 34951  
for technical questions, please call 1-800-444-3353.  
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parts list  
part  
1
Description  
Q’ty  
1
part  
34  
35  
36  
37  
38  
39  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
Description  
Q’ty  
1
Knob  
0.8 x 7 x 10 Spring  
2
No. 8 Washer  
Belt Cover  
2
Screw  
1
3
1
M6 x 16 Screw  
Motor  
3
4
M8 x 20 Bolt  
2
1
5
Hex Key Wrench  
Sanding Belt  
1
Label  
1
6
1
Switch  
1
7
No. 15 Spacer Bearing  
Small Belt Wheel  
Belt Drive Shaft  
M6 x 10 Hex Bolt  
Rotation Label  
Belt Guard  
2
Motor Wire Box  
Capacitor  
1
8
2
1
9
1
Wire Box Cover  
3.5 x 13 Phillips Screw  
Strain Relief  
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
1
6
2
1
1
Cable  
1
Belt Tension Shaft  
0.8 x 7 x 13 Spring  
No. 5 Washer  
Clip  
1
M5 x 12 Phillips Screw  
No. 5 Washer  
Disc Cover  
4
1
2
1
1
1
M6 x 25 Bolt  
M6 x 10 Hex Head Bolt  
Disc Wheel  
2
3 x 20 Pin  
1
1
Belt Tension Bracket  
Tracking/Tension Knob  
l x 10 x 18 Spring  
Washer  
1
1
1
Fastening Knob  
No. 6 Washer  
Miter Gauge Scale  
Miter Gauge Shaft  
Disc Table  
1
1
3
1
1
M10 x 30 Bolt  
1.4 x 8 x 35 Spring  
M4 x 12 Hex Screw  
No. 4 Washer  
Belt Backstop  
M10 Nut  
1
1
1
1
2
Dust Collector/Cover  
4 x 22 Pin  
1
2
2
1
M6 Wing Nut  
Motor Washer  
Base Plate  
2
1
1
M6 x 12 Screw  
Large Belt Wheel  
M8 x 25 Bolt  
2
1
1
Rubber Pad  
4
1
No. 8 Washer  
M6 x 12 Screw  
No. 35 Spacer Bearing  
2
Belt Table  
1
2
Locking Nut  
1
2
Knob  
1
please reaD tHe fOllOwing carefully  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEM-  
BLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER  
OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER  
THAT HE OR SHE IS qUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR  
SHE IS qUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER  
AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS  
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE  
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS  
TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS  
OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.  
reV 03/98  
SKU 34951  
for technical questions, please call 1-800-444-3353.  
Page 9  
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asseMBly DiagraM  
record products serial number Here:  
note: If product has no serial number, record month and year of purchase instead.  
note: Some parts are listed and shown for illustration purposes only, and are not available  
individually as replacement parts.  
reV 03/98  
SKU 34951  
for technical questions, please call 1-800-444-3353.  
Page 10  
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