Central Machinery 34951 Installation manual

BELT/DISC
SANDER
34951
SET UP AND OPERATING INSTRUCTIONS
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©1996 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. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Cover Revised 09g
Brought To You By Augusta Flint

Page 2For technical questions, please call 1-800-444-3353.SKU 34951
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures. Write the product’s
serial number in the back of the manual
near the assembly diagram (or month
and year of purchase if product has no
number). Keep this manual and the
receipt in a safe and dry place for future
reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling,
and all other information
provided with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING
indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
General Tool Safety Warnings
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in electric
shock, re and/or serious injury.
Save all warnings and
instructions for future reference.
KEEP GUARDS IN PLACE and in1.
working order.
REMOVE ADJUSTING KEYS AND2.
WRENCHES. Form habit of checking
to see that keys and adjusting
wrenches are removed from tool
before turning it on.
KEEP WORK AREA CLEAN.3.
Cluttered areas and benches invite
accidents.
DON’T USE IN DANGEROUS4.
ENVIRONMENT. Don’t use power
tools in damp or wet locations, or
expose them to rain. Keep work area
well lighted.
KEEP CHILDREN AWAY. All visitors5.
should be kept safe distance from
work area.
REV 09g
Brought To You By Augusta Flint

Page 3For technical questions, please call 1-800-444-3353.SKU 34951
MAKE WORKSHOP KID PROOF6.
with padlocks, master switches, or by
removing starter keys.
DON’T FORCE TOOL. It will do the7.
job better and safer at the rate for
which it was designed.
USE RIGHT TOOL. Don’t force tool
8.
or attachment to do a job for which it
was not designed.
RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS
(120 VOLT)
NAMEPLATE
AMPERES
(at full load)
EXTENSION CORD
LENGTH
25’ 50’ 100’ 150’
0 – 6 18 16 16 14
6.1 – 10 18 16 14 12
10.1 – 12 16 16 14 12
12.1 – 16 14 12 Do not use.
TABLE A
USE PROPER EXTENSION CORD.9.
Make sure your extension cord
is in good condition. When using
an extension cord, be sure to use
one heavy enough to carry the
current your product will draw. An
undersized cord will cause a drop in
line voltage resulting in loss of power
and overheating. Table A shows the
correct size to use depending on cord
length and nameplate ampere rating.
If in doubt, use the next heavier
gauge. The smaller the gauge
number, the heavier the cord.
WEAR PROPER APPAREL. Do10.
not wear loose clothing, gloves,
neckties, rings, bracelets, or other
jewelry which may get caught in
moving parts. Nonslip footwear is
recommended. Wear protective hair
covering to contain long hair.
ALWAYS USE SAFETY GLASSES.
11.
Also use face or dust mask if
cutting operation is dusty. Everyday
eyeglasses only have impact
resistant lenses, they are NOT safety
glasses.
SECURE WORK. Use clamps or a
12.
vise to hold work when practical. It’s
safer than using your hand and it
frees both hands to operate tool.
DON’T OVERREACH. Keep proper
13.
footing and balance at all times.
MAINTAIN TOOLS WITH CARE.14.
Keep tools sharp and clean for best
and safest performance. Follow
instructions for lubricating and
changing accessories.
DISCONNECT TOOLS before15.
servicing; when changing
accessories, such as blades, bits,
cutters, and the like.
REDUCE THE RISK OF16.
UNINTENTIONAL STARTING. Make
sure switch is in off position before
plugging in.
USE RECOMMENDED17.
ACCESSORIES. Consult the
owner’s manual for recommended
accessories. The use of improper
accessories may cause risk of injury
to persons.
NEVER STAND ON TOOL. Serious18.
injury could occur if the tool is tipped
or if the cutting tool is unintentionally
contacted.
CHECK DAMAGED PARTS. Before19.
further use of the tool, a guard or
other part that is damaged should be
carefully checked to determine that
it will operate properly and perform
REV 09g
Brought To You By Augusta Flint

Page 4For technical questions, please call 1-800-444-3353.SKU 34951
its intended function – check for
alignment of moving parts, binding
of moving parts, breakage of parts,
mounting, and any other conditions
that may affect its operation. A guard
or other part that is damaged should
be properly repaired or replaced.
DIRECTION OF FEED. Feed work
20.
into a blade or cutter against the
direction of rotation of the blade or
cutter only.
NEVER LEAVE TOOL RUNNING
21.
UNATTENDED. TURN POWER OFF.
Don’t leave tool until it comes to a
complete stop.
GROUNDING INSTRUCTIONS
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM
INCORRECT GROUNDING
WIRE CONNECTION
READ AND FOLLOW THESE
INSTRUCTIONS:
110-120 V~ Grounded Tools: Tools
with Three Prong Plugs
In the event of a malfunction or1.
breakdown, grounding provides a
path of least resistance for electric
current to reduce the risk of electric
shock. This tool is equipped with an
electric cord having an equipment-
grounding conductor and a grounding
plug. The plug must be plugged into
a matching outlet that is properly
installed and grounded in accordance
with all local codes and ordinances.
Do not modify the plug provided –2.
if it will not t the outlet, have the
proper outlet installed by a qualied
electrician.
Improper connection of the
3.
equipment-grounding conductor can
result in a risk of electric shock. The
conductor with insulation having
an outer surface that is green with
or without yellow stripes is the
equipment-grounding conductor. If
repair or replacement of the electric
cord or plug is necessary, do not
connect the equipment-grounding
conductor to a live terminal.
Check with a qualied electrician or
4.
service personnel if the grounding
instructions are not completely
understood, or if in doubt as to
whether the tool is properly grounded.
Use only 3-wire extension cords that5.
have 3-prong grounding plugs and
3-pole receptacles that accept the
tool’s plug.
Repair or replace damaged or worn6.
cord immediately.
125 V~ 3-Prong Plug and Outlet
(for up to 125 V~ and up to 15 A)
Grounding
Pin
This tool is intended for use on a7.
circuit that has an outlet that looks
like the one illustrated above in 125
V~ 3-Prong Plug and Outlet. The
tool has a grounding plug that looks
like the plug illustrated above in 125
V~ 3-Prong Plug and Outlet.
REV 06l, 09g
Brought To You By Augusta Flint

Page 5For technical questions, please call 1-800-444-3353.SKU 34951
The outlet must be properly installed8.
and grounded in accordance with all
codes and ordinances.
Do not use an adapter to connect this9.
tool to a different outlet.
110-120 V~ Double Insulated
Tools: Tools with Two Prong
Plugs
Outlets for 2-Prong Plug
To reduce the risk of electric shock,1.
double insulated equipment has a
polarized plug (one blade is wider
than the other). This plug will t in a
polarized outlet only one way. If the
plug does not t fully in the outlet,
reverse the plug. If it still does not
t, contact a qualied electrician
to install the proper outlet. Do not
change the plug in any way.
Double insulated tools may be used2.
in either of the 120 volt outlets shown
in the preceding illustration. (See
Outlets for 2-Prong Plug.)
Sander Safety Warnings
For Your Own Safety Read Instruction
Manual Before Operating Sander
Wear eye protection.1.
Support workpiece with miter gauge,2.
backstop, or worktable.
Maintain 1/16 inch maximum
3.
clearance between table and sanding
belt or disc.
Avoid kickback by sanding in4.
accordance with the directional
arrows.
The backstop is a fence near the
5.
surface that helps the operator
maintain control of the workpiece and
prevents the workpiece from being
pulled into the machine. For safety,
it must be adjusted very close to the
sanding surface.
The worktable is the surface mounted
6.
close to the sanding surface that the
operator rests the workpiece against
to prevent it from being pulled by the
sanding surface. For safety, it must
be adjusted very close to the sanding
surface.
The sanding belt is designed to rotate7.
down towards the table while the disc
rotates both up from the table and
down towards the table. Sand on the
belt with the workpiece in front of the
backstop and/or table. Sand only on
the downward moving surface of the
disc - sanding on the upward moving
surface may result in the workpiece
being thrown up and towards the
operator.
DO NOT OPERATE WITH ANY8.
GUARD DISABLED, DAMAGED,
OR REMOVED. Moving guards
must move freely and close
instantly.
The use of accessories or9.
attachments not recommended by
the manufacturer may result in a risk
of injury to persons.
REV 09g
Brought To You By Augusta Flint

Page 6For technical questions, please call 1-800-444-3353.SKU 34951
When servicing use only identical10.
replacement parts.
Only use safety equipment that has
11.
been approved by an appropriate
standards agency. Unapproved
safety equipment may not provide
adequate protection. Eye protection
must be ANSI-approved and
breathing protection must be NIOSH-
approved for the specic hazards in
the work area.
Industrial applications must follow
12.
OSHA guidelines.
Maintain labels and nameplates on13.
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Avoid unintentional starting. Prepare14.
to begin work before turning on the
tool.
NEVER WEAR GLOVES OR HOLD15.
THE WORKPIECE WITH A RAG
WHEN SANDING.
DO NOT SAND PIECES THAT16.
ARE TOO SMALL TO BE SAFELY
SUPPORTED OR HELD. Such
pieces should be sanded by hand.
People with pacemakers should17.
consult their physician(s) before
use. Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
WARNING: Some dust created by18.
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 specially
designed to lter out microscopic
particles. (California Health & Safety
Code § 25249.5, et seq.)
WARNING: Handling the cord on
19.
this product will expose you to lead,
a chemical known to the State of
California to cause cancer, and
birth defects or other reproductive
harm. Wash hands after handling.
(California Health & Safety Code §
25249.5, et seq.)
The warnings, precautions,20.
and instructions discussed in
this instruction manual cannot
cover all possible conditions and
situations that may occur. It must
be understood by the operator that
common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
Vibration Safety
This tool vibrates during use.
Repeated or long-term exposure to
vibration may cause temporary or
permanent physical injury, particularly
to the hands, arms and shoulders. To
REV 09g
Brought To You By Augusta Flint

Page 7For technical questions, please call 1-800-444-3353.SKU 34951
reduce the risk of vibration-related
injury:
Anyone using vibrating tools regularly1.
or for an extended period should
rst be examined by a doctor and
then have regular medical check-
ups to ensure medical problems are
not being caused or worsened from
use. Pregnant women or people
who have impaired blood circulation
to the hand, past hand injuries,
nervous system disorders, diabetes,
or Raynaud’s Disease should not
use this tool. If you feel any medical
or physical symptoms related to
vibration (such as tingling, numbness,
and white or blue ngers), seek
medical advice as soon as possible.
Do not smoke during use. Nicotine2.
reduces the blood supply to the
hands and ngers, increasing the risk
of vibration-related injury.
Wear suitable gloves to reduce the3.
vibration effects on the user.
Use tools with the lowest vibration4.
when there is a choice between
different processes.
Include vibration-free periods each
5.
day of work.
Grip tool as lightly as possible (while6.
still keeping safe control of it). Let
the tool do the work.
To reduce vibration, maintain the tool
7.
as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
SAVE THESE
INSTRUCTIONS.
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
1-800-444-3353 as soon as possible.
SPECIFICATIONS
Disc Belt
Size 5” 1” x 30” Motor 1/3 HP, 2.4 A, 120 V~,
60 Hz
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)
REV 09g
Brought To You By Augusta Flint

Page 8For technical questions, please call 1-800-444-3353.SKU 34951
ASSEMBLY
The Belt Sander is shipped almost
completely assembled. The major items to
be attached 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 screw1.
(36), No. 8 washer (2), locking nut
(32), knob (33), spring (34), and
screw (36).
Remove the cover (3) by removing2.
the securing knob (1) and lifting up.
The screw (36) goes on the inside;3.
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
nally the last screw.
The knob is used to lock the table in4.
place when adjusting the angle.
Do not replace the cover until the belt5.
has been installed. This is covered
below.
Disc Assembly
Remove the cover (50).1.
Remove the dust collector2. (59).
Stick the sanding disc on the disc3.
wheel (53).
Get the disc wheel to the shaft of4.
the motor with the hex head bolt
(52).
Replace the cover and dust
5.
collector.
Disc Table Assembly
Get out the table (58),4 x 22 pins1.
(60), the No. 6 washers (55), and the
wing nuts (61).
Attach the table to the cover using
2.
the wing nuts and washers.
Drive in the pins so that the table can3.
“swing” for tilting.
Miter Gauge Assembly
Get out the shaft (57), scale (56), No.1.
6 washer (55), and fastening knob
(54).
Attach scale to shaft with washer and
2.
knob.
INSTALLING AND REMOVING
SANDING BELTS
UNPLUG THE MACHINE FROM1.
THE POWER SOURCE.
Unless it has already be taken off,
2.
remove the knob (1) from the top
of the sander. Remove the side
cover (3).
Put the belt over the upper wheel
3.
(8) and large belt wheel (29).
Lift up on the belt tracking knob
4.
(19) and slide the belt over the
lower belt wheel.
Replace the cover.
5.
Brought To You By Augusta Flint

Page 9For technical questions, please call 1-800-444-3353.SKU 34951
ADJUSTING BELT TRACKING
The belt tracking adjustment1.
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
2.
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 of1.
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,
2.
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
3.
as polishing or strapping, it’s
advisable to remove the backstop
entirely by unscrewing the two
bolts, two washers, and the
backstop itself.
Brought To You By Augusta Flint

Page 10For technical questions, please call 1-800-444-3353.SKU 34951
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 ASSEMBLY
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 98c
Brought To You By Augusta Flint

Page 11For technical questions, please call 1-800-444-3353.SKU 34951
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 98c
7
1
2
3
4
5
6
78
910 11
67
8
12
13
14
15
16
1718
19
20
21
22
36
24
25
26
27
28
29 30
44
45
43
39
42
46
47
38
37
31
2
32
54
55
56
57
58
52 53
51
50
49
48
61
62
63
59
65
64
35
55
60
11
33
34
66
23
Brought To You By Augusta Flint

Page 12For technical questions, please call 1-800-444-3353.SKU 34951
REV 09g
LIMITED 1 YEAR / 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that for a period
of ninety days from date of purchase that the engine/motor, the belts (if so equipped),
and the blades (if so equipped) are free of defects in materials and workmanship.
Harbor Freight Tools also warrants to the original purchaser, for a period of one year
from date of purchase, that all other parts and components of the product are free from
defects in materials and workmanship (90 days if used by a professional contractor
or if used as rental equipment). This warranty does not apply to damage due directly
or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, normal wear and tear, or to lack of maintenance. We shall in no event be
liable for death, injuries to persons or property, or for incidental, contingent, special
or consequential damages arising from the use of our product. Some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above
limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN
LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us
with transportation charges prepaid. Proof of purchase date and an explanation of the
complaint must accompany the merchandise. If our inspection veries the defect, we
will either repair or replace the product at our election or we may elect to refund the
purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that
the defect resulted from causes not within the scope of our warranty, then you must
bear the cost of returning the product.
This warranty gives you specic legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • [phone]
Brought To You By Augusta Flint