Central Machinery 34951 Parts list 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.

Page 2SKU 34951 For technical questions, please call 1-800-444-3353.
SPECIFICATIONS
Disc Belt
Size 5” 1” x 30” Motor 1/3 HP, 2.4 A, 110 V~,
60 Hz, Single Phase
Speed 3450 RPM 3350 FPM
Table 4” x 7-1/4” 5” X 5” Weight 17 Pounds
Table Tilt 45° (both)
Dust Chute 1-1/2” (both)
Save This Manual
You will need this manual for the safety warnings and precautions, assembly, oper-
ating, inspection, maintenance and cleaning procedures, parts list and assembly diagram.
Keep your invoice with this manual. Write the invoice number on the inside of the front
cover. Write the product’s serial number in the back of the manual near the assembly dia-
gram, or write month and year of purchase if product has no number. Keep this manual
and invoice in a safe and dry place for future reference.
IMPORTANT SAFETY PRECAUTIONS
WARNING: When using electric tools, basic safety precautions should always be followed to
reduce the risk of fire, electric shock, and personal injury, including the following:
READ ALL INSTRUCTIONS BEFORE USING THIS TOOL
KEEP WORK AREA CLEAN. Cluttered areas invite injuries.
CONSIDER WORK AREA CONDITIONS. Don’t use machines or power tools
in damp, wet, or poorly lit locations. Don’t expose to rain. Keep work area well
lit. Don’t use tools in the presence of flammable gases or liquids.
KEEP CHILDREN AWAY. All children should be kept away from the work area.
Don’t let them handle machines, tools or extension cords.
STORE IDLE EQUIPMENT. When not in use, tools should be locked up in a dry
location to inhibit rust. If possible, store in an area out of reach of children.
DON’T FORCE THE MACHINE OR TOOL. It will do the job better and more safely
at the rate for which it was intended.
USE THE RIGHT TOOL. Don’t force a small tool or attachment to do the work of a
larger industrial tool. Don’t use a tool for a purpose for which it was not intended.
DRESS PROPERLY. Don’t wear loose clothing or jewelry. They can be caught in
moving parts. Protective, electrically non-conductive gloves and non-skid footwear
are recommended when working.Wear protective hair covering to contain long hair,
preventing it from getting caught in machinery.
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Page 3SKU 34951 For technical questions, please call 1-800-444-3353.
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.
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.
MAINTAIN TOOLS 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.
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.
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.
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.
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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.
MAINTAIN A CLEARANCE OF 1/16”OR 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 qualified 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 fit the outlet, have a proper outlet installed by
a qualified electrician.
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REV 12/06

Page 5SKU 34951 For technical questions, please call 1-800-444-3353.
GROUNDED TOOLS: TOOLS WITH THREE PRONG PLUGS
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.)
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
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
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.)
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Page 6SKU 34951 For technical questions, please call 1-800-444-3353.
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.)
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.)
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.
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 18 18 18 18 16
2.1 – 3.4 18 18 18 16 14
3.5 – 5.0 18 18 16 14 12
5.1 – 7.0 18 16 14 12 12
TABLE A * Based on limiting the line voltage drop to five volts at 150% of the rated amperes.
SYMBOLOGY
Double Insulated V~ Volts Alternating Current
Canadian Standards Association AAmperes
Underwriters Laboratories, Inc. n0xxxx/min. No Load Revolutions per Minute
(RPM)
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.
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Page 7SKU 34951 For technical questions, please call 1-800-444-3353.
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
Get out the table (31), 16mm screw (36), No. 8 washer (2), locking nut (32), knob
(33), spring (34), and screw (36).
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.
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).
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
Get out the table (58),4 x 22 pins (60), the No. 6 washers (55), and the wing nuts
(61).
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
Get out the shaft (57), scale (56), No. 6 washer (55), and fastening knob (54).
Attach scale to shaft with washer and knob.
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Page 8SKU 34951 For technical questions, please call 1-800-444-3353.
INSTALLING AND REMOVING SANDING BELTS
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).
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.
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).
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
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.
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Page 9SKU 34951 For technical questions, please call 1-800-444-3353.
PARTS LIST
Part Description Q’ty
1 Knob 1
2 No. 8 Washer 2
3 Belt Cover 1
4 M8 x 20 Bolt 2
5 Hex Key Wrench 1
6 Sanding Belt 1
7 No. 15 Spacer Bearing 2
8 Small Belt Wheel 2
9 Belt Drive Shaft 1
10 M6 x 10 Hex Bolt 1
11 Rotation Label 2
12 Belt Guard 1
13 Belt Tension Shaft 1
14 0.8 x 7 x 13 Spring 1
15 No. 5 Washer 1
16 Clip 1
17 3 x 20 Pin 1
18 Belt Tension Bracket 1
19 Tracking/Tension Knob 1
20 l x 10 x 18 Spring 1
21 Washer 1
22 M10 x 30 Bolt 1
23 1.4 x 8 x 35 Spring 1
24 M4 x 12 Hex Screw 2
25 No. 4 Washer 2
26 Belt Backstop 1
27 M10 Nut 1
28 M6 x 12 Screw 2
29 Large Belt Wheel 1
30 M8 x 25 Bolt 1
31 Belt Table 1
32 Locking Nut 1
33 Knob 1
Part Description Q’ty
34 0.8 x 7 x 10 Spring 1
35 Screw 1
36 M6 x 16 Screw 3
37 Motor 1
38 Label 1
39 Switch 1
42 Motor Wire Box 1
43 Capacitor 1
44 Wire Box Cover 1
45 3.5 x 13 Phillips Screw 6
46 Strain Relief 1
47 Cable 1
48 M5 x 12 Phillips Screw 4
49 No. 5 Washer 2
50 Disc Cover 1
51 M6 x 25 Bolt 2
52 M6 x 10 Hex Head Bolt 1
53 Disc Wheel 1
54 Fastening Knob 1
55 No. 6 Washer 3
56 Miter Gauge Scale 1
57 Miter Gauge Shaft 1
58 Disc Table 1
59 Dust Collector/Cover 1
60 4 x 22 Pin 2
61 M6 Wing Nut 2
62 Motor Washer 1
63 Base Plate 1
64 Rubber Pad 4
65 No. 8 Washer 2
66 M6 x 12 Screw 2
67 No. 35 Spacer Bearing 2
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

Page 10SKU 34951 For technical questions, please call 1-800-444-3353.
ASSEMBLY DIAGRAM
Record Product’s 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