®
AIR MICRO
DIE GRINDER
Model 47869
ASSEMBLY and OPERATING
INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright
2002 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
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8. Use eye and ear protection. Always wear ANSI approved impact safety goggles.
Wear a full face shield if you are producing metal filings or wood chips. Wear an ANSI
approved dust mask or respirator when working around metal, wood, and chemical
dusts and mists.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines or air hoses.
10. Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords and air 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.
11. Disconnect air supply. Disconnect air hose when not in use.
12. Remove adjusting keys and wrenches. Check that adjusting wrenches are
removed from the tool or machine work surface before plugging it in.
13. Avoid unintentional starting. Be sure the Sliding Knob (#4) is not twisted in the on
position when not in use and before plugging in.
14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
15. Check for 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 and binding of moving parts; any broken parts
or mounting fixtures; and any other condition that may affect proper operation. Any
part that is damaged should be properly repaired or replaced by a qualified
technician. Do not use the tool if any switch does not turn On and Off properly.
16. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
17. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor
Freight Tools.
18. Do not operate tool if under the 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 the tool.
19. Use proper size and type extension cord. If an extension cord is required, it must
be of the proper size and type to supply the correct current to the tool without heating
up. Otherwise, the extension cord could melt and catch fire, or cause electrical
damage to the tool. Check your compressor’s manual for the appropriate size cord.
20. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.
21. Compressed air only. Never use combustible gases as a power source.
22. Read and adhere to all warnings and instructions provided in the instruction manual of
the air compressor being used to power the Air Die Grinder.
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Note: Performance of the compressor (if powered by line voltage) may vary depending
on variations in local line voltage. Extension cord usage may also affect tool perfor-
mance.
Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be under-
stood by the operator that common sense and caution are factors which cannot be
built into this product, but must be supplied by the operator. Additionally, read and
follow all of the instructions in the compressor manual you will be using.
Unpacking
When unpacking, check to make sure the parts listed on page 7 are included. If any parts
are missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual as soon as possible.
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:
A)
B)
Lead from lead-based paints;
Crystalline silica from bricks and cement or other masonry
products;
Arsenic and chromium from chemically treated lumber.
C)
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 filter out microscopic particles.
(California Health & Safety Code 25249.5, et seq. )
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Operation
Operational Warnings!!
1. Never install a carbide tipped or steel circular saw blade for use on this Die Grinder.
2. Never install a wood carving blade, carving disc with chain saw cutters, or a cutting carving
disc on this Die Grinder.
3. All accessories must be rated for at least 56,000 rpm’s. Wheels and other accessories
running over rated speed can fly apart and cause injury.
1/4”-18 NPT
For best service you should incorporate an oiler, regulator, and inline filter, as shown in the
diagram above. Hoses, couplers, oilers, regulators, and filters are all available at Harbor
Freight Tools.
1. Attach air hose to Air Connector (#29) on the end of the Air Hose (#28).
Note: If not using an automatic oiler system, before operation, add a few drops of Pneumatic
Tool Oil to the airline connection. Add a few drops more after each hour of continual use.
2. Set the air pressure on your compressor to 90 PSI. Do not exceed the recommended air
pressure of 90 PSI.
3. Check the air connection for leaks.
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Operation (continued)
Usage.
Note: Always disconnect the Die Grinder from the air compressor hose before changing or
adjusting accessories.
1. Use the two Wrenches (#30) to attach accessories. Place the Wrench (#30) on the notch
of the Clamping Nut (#25) to secure it. Use the other Wrench (#30) to turn the Collet (#24).
2. Insert the desired 1/8” mandrel into the Collet (#24) at least 5/8”.
3. Using the Wrenches (#30), tighten the Clamping Nut (#25).
Note: Before each use check the Collet (#24) and make sure the accessory is securely
fastened.
Note: Always wear ANSI approved impact safety goggles and a full face shield if you are
producing metal filings or wood chips. Wear an ANSI approved dust mask or respirator when
working around metal, wood, and chemical dusts and mists.
4. Make sure the workpiece is securely fastened down.
Warning! Make sure your hands or fingers are not in contact with the accessory before
starting the unit.
5. Turn on your compressor making sure it is not set above the recommended 90 PSI.
6. Hold the Die Grinder with both hands, away from your body, and twist on the Sliding
Knob (#4). Wait until the Die Grinder gets up to speed before contacting the workpiece.
Make gentle contact, allowing the Die Grinder to do the work without forcing it. If it isn’t
running smoothly, you are forcing it, which may burn out the Grinder.
7. When finished, twist off the Sliding Knob (#4) and disconnect from the compressor.
Maintenance
1. Before and after operation, add a few dops of Pnuematic Tool Oil to the airline connection.
Add a few drops more after each hour of continual use.
2. Never leave the unit connected to the compressor.
3. Wipe down or blow out with air occasionally. Never use solvents to clean the body of the
Die Grinder.
4. Check that the Collet (#24) is clear of dirt and debris.
Page 6
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Parts List
Part No.
1
2
3
4
5
6
7
8
Description
End Holder
Screw
0-ring
Sliding Knob
0-ring
Hose Plug
Pin
Plug
Intake Plate
Ball Bearing
Bearing Plate
Pin
Qty. Part No.
Description
Spacer
Lateral Disc
Ball Bearing
Inner Bearing/Bushing 1
Outer Bearing/Bushing 1
Collet Foundation
Sleeve
Front Cover
Collet
Clamping Nut
Muffler Tube
Hose Ring
Air Hose
Qty.
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
4
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
2
1
1
1
1
1
1
2
1
1
2
9
10
11
12
13
14
15
Cylinder
Rotor Blade
Rotor
Air Connector
Wrench
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 DISTRIBU-
TOR 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.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
Page 7
SKU 47869
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Assembly Drawing
29
28
27
27
1
2
3
26
6
7
4
14
5
3
15
8
16
9
17
10
18
11
19
25
12
22
20
13
18
23
24
30
21
Note: The second Wrench (#30), the tool oil, and the entire length of the Air Hose (#28) are
not shown.
Page 8
SKU 47869
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