Harbor Freight Tools Central Pneumatic Professional 93867 User manual
SKU 93867 For technical questions, please call 1-800-444-3353 Page 1
6” Orbital Composite
Sander
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
Copyright © 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 and replacement parts, please call 1-800-444-3353
93867
Because of continuing improvements, actual product may differ slightly from photo.
Sanding disc not included.
SKU 93867 For technical questions, please call 1-800-444-3353 Page 2
Specications
Construction: Lightweight composite housing with ma-
chined steel and aluminum components
Air Pressure
Specica-
tions:
Operating Pressure: 90 PSI
Rated Air Consumption: 7 CFM @ 90
PSI
Air Inlet Size: ¼” - 18 NPT
No Load rpm: 10,000 RPM Trigger Type: Paddle
Disc Size: standard 6” Spindle Size: 5/16” x 24 TPI, female threads
Dimensions: 5-5/8”L x 4”W x 3-5/8”H Net Weight: 1.9 lbs.
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions, operat-
ing and maintenance procedures, parts list and diagram. Keep your invoice with this manual. Write the
invoice number on the inside of the front cover. Keep the manual and invoice in a safe and dry place for
future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to reduce the risk
of personal injury and damage to equipment. Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use tools in damp or wet locations. Don’t expose to rain. Keep
work area well lit. Do not use electrically powered tools such as an air compressor in the presence of
ammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let them handle
machines, tools, or extension cords.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit rust. Always
lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment to do the work of a
larger industrial tool. There are certain applications for which this tool was designed. It will do the job
better and more safely at the rate for which it was intended. Do not modify this tool and do not use this
tool for a purpose for which it was not intended.
6. Dress properly while working. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Protective, electrically nonconductive clothes and nonskid footwear are recommended when
working. Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI-approved impact safety goggles. Wear a full face shield if
you are producing metal lings or wood chips. Wear an ANSI-approved dust mask or respirator when
working around metal, wood, and chemical dusts and mists.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or across running
SKU 93867 For technical questions, please call 1-800-444-3353 Page 3
machines.
9. Maintain tools with care. Keep tools clean and in good condition for better and safer performance.
Follow instructions for lubricating and changing accessories. Inspect tool ttings and hoses periodically
and, if damaged, have them repaired by an authorized technician. The handles must be kept clean,
dry, and free from oil and grease at all times.
10. Stay alert. Watch what you are doing, and use common sense when operating a air tool. Do
not use a air tool while tired or under the inuence of drugs, alcohol, or medication. A moment
of inattention while operating air tools may result in serious personal injury.
11. Avoid accidental starting. Be sure the Throttle Lever is in the OFF position before attaching the
air pressure hose. Carrying air tools with your hand on the throttle lever invites accidents.
12. Remove adjusting keys or wrenches before connecting the tool to its air supply. A wrench or a
key that is left attached to a rotating part of the air tool may result in personal injury.
13. Do not overreach. Keep proper footing and balance at all times. Proper footing and balance
enables better control of the air tool in unexpected situations.
14. Use clamps (not included) or other practical ways to secure and support the work piece to a
stable platform. Holding the work by hand or against your body is unstable and may lead to loss of
control.
15. Do not use the air tool if the throttle lever does not turn it on or off. Any tool that cannot be controlled
with the throttle lever is dangerous and must be replaced.
16. Disconnect the air hose from the tool before making any adjustments, changing accessories,
or storing the tool. Such preventive safety measures reduce the risk of starting the tool accidentally.
17. Check for misalignment or binding of moving parts, breakage of parts, and any other condition
that may affect the tool’s operation. If damaged, have the tool serviced before using. Many
accidents are caused by poorly maintained tools.
18. Tool service must be performed only by qualied repair personnel. Service or maintenance
performed by unqualied personnel could result in a risk of injury.
19. When servicing a tool, use only identical replacement parts. Use of unauthorized parts or failure
to follow maintenance instructions may create a risk of electric shock or injury.
20. Maintain labels and nameplates on the tool. These carry important information. If unreadable or
missing, contact Harbor Freight Tools for a replacement.
21. When starting a handheld air tool, always maintain a rm grip on the tool to resist starting torque.
22. Always keep the air pressure hose away from moving parts on the tool.
23. Hold tool by insulated gripping surfaces when performing an operation where the tool may
contact hidden wiring. Contact with a “live” wire will make exposed metal parts of the tool “live”
and shock the operator.
24. Never lay the tool down until the motor has come to a complete stop. The tool may create
unforeseen risk while the motor cycles down.
25. WARNING! Some dust created by power sanding, sawing, grinding, drilling, and other construction
activities, contain 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
SKU 93867 For technical questions, please call 1-800-444-3353 Page 4
Specic Safety Precautions
1. The backing pad will continue to turn for a few seconds after the tool is turned off. Do not set the tool
down until the pad has stopped turning.
2. Do not start the tool with the sanding disc in contact with any surface. Start it rst, then apply the sanding
disc to the work surface.
3. When the tool is in use, keep hands away from the sanding area.
4. Only use sanding discs which are rated for 10,000 RPM or greater.
5. Only use sanding discs designed for hook and loop sanding pads.
6. Keep the air pressure hose well away from the work area. Always position the pressure hose so it will
not be caught in the work piece, or damaged by the sanding disc.
7. Inspect the tool and the sanding disc for safety before attaching the air pressure hose to the tool.
Assembly
1. Install a Male Quick Connect Coupler (not included) to the Air Inlet (38). First wrap the threaded portion
of the coupler with pipe thread seal tape before threading it into the Air Inlet. Tighten securely.
2. Attach a standard quick connector (not included) to your air pressure source hose. Then attach the air
hose to the quick connect coupler.
3. Set the air pressure regulator at 90 PSI.
WARNING: NEVER exceed the recommended pressure of 90 PSI. Damage to
your tool, and SEVERE PERSONAL INJURY may result.
4. Check the air line and its connections for air leaks. Make note of these, and repair them before using
this tool.
5. Install an appropriate sanding disc following instructions on next page.
NOTE: Turn off your air compressor and disconnect the air pressure hose before changing sanding
discs or making any adjustments to this tool. Severe injury or property damage may otherwise result.
USE ONLY 6” SANDING DISCS DESIGNED FOR HOOK AND LOOP TYPE PADS.
WARNING! All sanding discs for this tool must be rated for at least 10,000 RPM.
Sanding discs running over their rated speed can y apart and cause injury.
WARNING! Never install a grinding wheel or steel circular saw blade for use in
this tool. Never install a wood carving blade, carving disc with chain saw cutters,
or a cutting carving disc on this tool.
Unpacking
Your product includes the Composite Air Sander and Pad Wrenches.
When unpacking, check to make sure that the product is intact and undamaged.
If any parts are missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual.
SKU 93867 For technical questions, please call 1-800-444-3353 Page 5
Operation
1. Select the appropriate sanding disc (not included) for your needs. The disc must have a loop backing
to mount on the backing pad. Hook and loop type 6” sanding discs are available from Harbor Freight
Tools in many grits and abrasive types.
2. Disconnect the air pressure hose from the tool. Secure the workpiece rmly to a solid, stable surface.
3. Center the disc on the pad and press rmly in place.
4. Put on safety equipment including ANSI-approved safety goggles, if you are not already wearing such.
Reconnect the air pressure hose to the tool.
5. When it is safe to do so, press down the Throttle Lever (24) to start the tool. Apply it to the work surface
as needed.
6. You can adjust the speed of the tool by turning the Regulator Valve (27) clockwise to decrease speed
and counterclockwise to increase speed.
7. When you are done sanding, release the Throttle Lever to stop the tool.
NOTE: If you are not using an automatic in-line oiler, add a few drops of pneumatic oil to the Air Inlet
(38) before attaching the air hose. Add a few more drops of oil after every hour of continual use.
NOTE: Performance of this tool may vary depending on variations in local air pressure.
Air Pressure Supply
We recommend that you use both a lter and an in-line oiler in your air supply system as illustrated
in the diagram below. These components are not included with this tool, but are available from Harbor
Freight Tools.
We recommend that you install a quick-release nipple (not included) into the Air Inlet (38). Working
with air powered tools is easier and more convenient if you install quick release connectors at all attach-
ment points in your system.
Air
Sander
Quick
Disconnect
(optional)
SKU 93867 For technical questions, please call 1-800-444-3353 Page 6
About Air Sanders and Sanding Discs
While an extremely useful tool, air sanders can be dangerous
if damaged or used improperly.
1. Sanding Discs are made of aggregates of a cutting material
(grit) such as Aluminum Oxide bound to a heavy paper or cloth
backing.
2. Sanding discs come in different sizes, speed ranges and grit
sizes.
3. This sander is designed to accept 6” diameter sanding discs,
with a PSA (Pressure Sensitive Adhesive) backing designed
to attach to the hook surface of the Backing pad (23). Do not
use discs of any other size or type.
4. This sander has a maximum speed of 10,000 RPM.
WARNING: Do not use a sanding disc which is not rated
for at least this speed. Using lower speed rated discs at
higher speed may cause the sanding disc to come apart
and be ejected from the sander at high speed, possibly
causing severe personal or property damage.
5. Sanding discs are identied by the material which makes up the grit, the recommended workpiece
material, and a grit number which indicates the coarseness of the grit. Lower numbers are more coarse.
Coarse grits cut faster, but leave a rough surface. Finer grits (higher grit numbers) cut more slowly,
but leave a more nished surface. Select the grit which is appropriate to the job at hand. Usually, you
will start with a coarse grit, then re-sand with progressively ner grits until the desired surface nish is
achieved.
6. During use, sanding discs will become worn, and may tear. Wheels which are damaged in this way will
usually cause the sander to vibrate. When the sanding disc is worn or torn, stop work and replace
the disc.
Using the Sander
Before using the Sander, be sure all work area safety precautions are being observed. Be sure to wear
ANSI-approved eye protection.
1. Examine the Sanding disc before use. Check for excessively worn spots, tears, and any other damage.
Do not use a damaged disc.
1. Start the tool, and place it at on the workpiece. Keep a rm grip on the tool.
2. Guide the tool back and forth over the work piece in a steady motion. Do not press down, but allow the
weight of the tool to do the work. Be careful not to over-sand in one area or round off corners. Keep
the tool moving, and check your work as you go.
CAUTION: This tool is not designed for wet sanding. Do not use water or other lubricants while
sanding with this tool.
NOTE: Do not cover the exhaust ports while the tool is in use. This will reduce the efciency of the tool,
and may cause damage.
The Sander showing the
backing pad removed.
Regulator
Valve (27)
SKU 93867 For technical questions, please call 1-800-444-3353 Page 7
Parts List
Part Description QTY. Part Description QTY.
1 Housing 1 21 Spindle 1
2 Housing Grip 1 22 Pad Shroud 1
3 External Stop Ring 1 23 6” Sanding Pad 1
4 Ball Bearing 1 24 Lever 1
5 Spring Pin 1 25 Needle Roller 1
6 Rear Plate 1 26 O-Ring 4
7 Rotor 1 27 Regulator Valve 1
8 Rotor Blade 5 28 O-Ring 1
9 Cylinder 1 29 Valve Stem 1
10 O-Ring 1 30 O-Ring 1
11 Front End Plate 1 31 Spring 1
12 Ball Bearing 1 32 Throttle Valve Plug 1
13 O-Ring 1 33 External Stop Ring 1
14 Lock Ring 1 34 Internal Mufer 1
15 Shaft Balancer 1 35 Mufer Felt 1
16 Woodruff Key 1 36 Mufer 1
17 Ball Bearing 2 37 O-Ring 1
18 Gasket 1 38 Air Inlet 1
19 Washer 1 39 Pad Wrench 1
20 Retaining Ring 1
Maintenance
1. Inject a small amount of medium weight air tool oil into the Air Inlet (38) after each hour of continuous
use.
2. Wipe housing with a dry cloth before storing.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE
TOOL ONLY. NEITHER THE MANUFACTURER NOR 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.
SKU 93867 For technical questions, please call 1-800-444-3353 Page 8
Assembly Drawing
NOTE: Some parts are listed and shown for illustration purposes
only and are not available individually as replacement parts.
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 this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly, to
misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper instal-
lation, 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 exclu-
sion 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 specic 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 • (800) 444-3353
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