MINI AIR DIE GRINDER
WITH 5 ACCESSORIES
Model 47050
ASSEMBLY and OPERATING
INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright
2001 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
Manual Revised 11h
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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 Throttle Lever is not depressed when not
in use and before plugging in. Do not carry any tool with your finger on the Throttle
Lever, whether it is plugged in or not.
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.
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SKU 47050
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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 performance.
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:
-
-
-
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 filter out microscopic particles.
(California Health & Safety Code 25249.5, et seq. )
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SKU 47050
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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 carv-
ing disc on this Die Grinder.
3. All accessories must be rated for at least 21,000 rpm’s. Wheels and other accessories
running over rated speed can fly apart and cause injury.
1/4” 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 (#1).
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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SKU 47050
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Operation (continued)
Usage.
Note: Always disconnect the Die Grinder from the air compressor before changing or
adjusting accessories.
1. Use the two Wrenches (#35 & #36) to attach accessories. Place the Wrench (#36) on the
notch of the Spindle (#32) to secure it. Use the L-Wrench (#35) to turn the Collet Cap (#34).
2. Insert the desired 1/4” or 1/8” mandrel through the Collet Cap (#34) and into the
Collet (#33) at least 5/8”.
3. Using the Wrenches (#35 & #36) tighten the Collet Cap (#34).
Note: Before each use check the Collet (#33) 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 start-
ing 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 squeeze the Throttle
Lever (#3). 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. The unit is equipped with an Air Regulator (#14) to fine tune the air pressure.
8. When finished, release the Throttle Lever (#3) 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 (#33) is clear of dirt and debris.
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SKU 47050
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Parts List
Part No.
1
2
3
4
5
6
7
Description
Air Connector
Exhaust Deflector 1
Throttle Lever
Spring Pin
Spring Pin
Spring
Safety Stick
Washer
Valve
0-ring
0-ring
Throttle Valve
Spring
Air Regulator
0-ring
0-ring
Valve Screw
Bearing
Qty. Part No.
Description
Bearing
Rear End Plate
Spring Pin
Cylinder
Rotor Blade
Rotor
Washer
Spring Pin
Front End Plate
Bearing
Retainer
Cover
Housing Cap
Spindle
Collet
Collet Cap
L - Wrench
Wrench
Air Regulator Kit
Mounting Stone Kit 1
Qty.
1
1
1
1
4
1
1
2
1
1
1
1
1
19
20
21
22
23
24
25
26
27
28
29
30
1
1
1
1
1
1
1
1
1
1
1
8
9
10
11
12
13
14
15
16
17
18
31
1
1
1
1
1
1
32
33
34
35
36
37
38
1
1
1
1
1
1
Note: Parts 10 through 17 will not be sold separately. You must purchase all of the parts as
a set called the Air Regulator Kit (#37).
Note: You may purchase the Mounting Stone Kit (#38) as a set including 2 - 1/4” Mounting
Stones and 3 - 1/8” Mounting Stones.
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 DIS-
TRIBUTOR 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 MANU-
FACTURER 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 BUYERASSUMESALL RISKAND LIABILITYARISING 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.
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SKU 47050
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Assembly Drawing
Note: Parts 10 through 17 will not be sold separately. You must purchase all of the parts as
a set called the Air Regulator Kit (#37).
35
34
33
Note: You may purchase the Mounting Stone Kit (#38) as a set including 2 - 1/4” Mounting
Stones and 3 - 1/8” Mounting Stones.
2 - 1/4” Mounting Stones
3 - 1/8” Mounting Stones
Page 8
SKU 47050
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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 installation, 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 verifies 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 specific legal rights and you may also have other rights
which vary from state to state.
Page 9
SKU 47050
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