Angle die grinder
Model 93088
Set up And OperAting inStructiOnS
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described herein.
distributed exclusively by Harbor Freight tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
read this material before using this product.
Failure to do so can result in serious injury.
SAVe tHiS MAnuAl.
Copyright© 2005 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.
cover revised 07i
9.
dO nOt ABuSe tHe pOwer cOrd. Do not yank compressor’s cord to disconnect it
from the receptacle. Do not carry tools by the cord.
10.
11.
dO nOt OVerreAcH. Keep proper footing and balance at all times. Do not reach over
or across running machines.
MAintAin tOOlS witH cAre. Keep tools sharp and clean for better and safer perfor-
mance. Follow instructions for lubricating and changing accessories. Inspect compres-
sor’s cord periodically and, if damaged, have them repaired by an authorized technician.
Inspect all hoses for leaks prior to use. The handles must be kept clean, dry, and free
from oil and grease at all times.
12.
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.
13.
14.
15.
AVOid unintentiOnAl StArting. Do not carry any tool with your finger on the trig-
ger, whether it is connected to the compressor or not.
StAy Alert. Watch what you are doing; use common sense. Do not 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 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.
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.
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 im-
paired while taking drugs. If there is any doubt, do not operate the tool.
18.
19.
drAin cOMpreSSOr eVery dAy. Do not allow moisture to build up inside the com-
pressor. Do not allow compressor to sit pressurized for longer than one hour.
MAKe Sure All eQuipMent iS rAted tO tHe ApprOpriAte cApAcity. Make
sure that regulator is set at least 10 PSI lower than the lowest rated piece of equipment
you are using.
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 3
20.
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 specially designed
to filter out microscopic particles. (California Health & Safety Code § 25249.5, et seq.)
unpAcKing
When unpacking your Angle Die Grinder, check the items against the list below. If any parts are
missing or broken, please call Harbor Freight Tools at the number on the cover of this manual.
item
N/A
N/A
31
description
Die Grinder Assembly
Wrench
Qty
1
2
Collet
1
32
Collet Nut
1
grinding Attachment installation
1.
2.
Select the Grinding Attachment appropriate for your needs.
Select the COLLET (31) that has the same diameter as the Grinding Attachment.
The diameter will be either ¼” or 1/8”.
Collet Nut (32)
Figure 1 — Inserting the Collet
3.
4.
Insert the COLLET into the COLLET NUT (32) as shown in Figure 1.
Thread the COLLET NUT onto the CHUCK CASING (29) a few turns.
REV 08e; 08g
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 4
(32)
Figure 2 — Grinding Attachment
5.
Insert the Shaft of the Grinding Attachment through the flared end of the COLLET as
shown in Figure 2.
ASSeMBly
To complete assembly, you will need to purchase approved grinding attachments from Harbor
Freight Tools.
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 5
Collet Nut (32)
(44)
Figure 3 — Wrench Placement
6.
Place the small end of WRENCH (44) on the flats of the CHUCK CASING as shown in
Figure 3.
(44)
(44)
Collet Nut (32)
Figure 4 — Tightening the Collet Nut
7.
Place the large end of WRENCH (44) on the flats of the COLLET NUT and tighten as
shown in Figure 4.
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 6
Air connection
1.
You will need a Union fitting (sold separately) before you can connect your Die Grinder
to an air compressor.
2.
3.
Attach the Union fitting to the HOSE ADAPTER (1) and tighten.
Attach an Air Coupler (sold separately) to the Union fitting if desired. This is a useful ac-
cessory as it allows quick-coupling action when using a variety of tools with the same air
compressor.
4.
Your Die Grinder is ready for use.
OperAtiOn
Setup
Frequent, but not excessive, lubrication is required for best performance. Oil added through the
airline connection will lubricate internal parts. An automatic airline oiler is recommended but oil
may be added manually before every operation or after about 1 hour of continuous use. Only
a few drops of oil at a time are necessary. Too much oil will collect inside the tool and be blown
out during the exhaust cycle. Only uSe pneuMAtic tOOl Oil. Do not use detergent oil or
additives as these lubricants will cause accelerated wear to the seals in the tool.
Dirt and water in the air supply are major causes of pneumatic tool wear. Use a filter/oiler for
better performance and longer life. The filter must have adequate flow capacity for the specific
application. Consult the manufacturer’s instructions for proper maintenance of your filter.
The connector on the tool must not hold pressure when the air supply is disconnected. If the
wrong fitting is used, the tool can remain charged with air after being disconnected and still be
able to drive a fastener. See Figure 5 for the recommended accessories and connection order.
Figure 5 — Airline Oiler Assembly
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 7
Use
1.
Set the compressor’s pressure regulator to 90 PSI. Do not set the compressor’s outlet
regulator over 90 PSI.
2.
3.
Connect the Die Grinder to the air compressor’s hose. If leaking is detected, disconnect
the air hose and repair before use.
WARNING!
Place the material you will be grinding into a vise or other-
Wear protective gloves,
wise clamp the object so that it will not move around when
goggles, and a dust mask
you use the Die Grinder. Make sure you still have unob-
when operating this tool.
structed access to the area you will be grinding.
4.
5.
6.
Grip the Die Grinder firmly with your hand. To begin grinding, press the LEVER (4).
Press the LEVER before you touch the Grinding Attachment to the surface.
Your Die Grinder’s speed is variable. To vary the speed of the Die Grinder, vary the
pressure on the LEVER.
Allow the Grinding Attachment to do the work. Do not use excessive force to press the
Die Grinder and Grinding Attachment into the surface you are grinding. If you put pres-
sure on the Die Grinder and it stalls, immediately release the LEVER and pull the Die
Grinder off of the surface.
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 8
MAintenAnce
Your Die Grinder is best operated with an Airline Oiler. If you are using the Die Grinder without
an Airline Oiler, follow the steps below for maintenance.
1.
Disconnect the Die Grinder from the air
hose.
2.
Apply a few drops of pneuMAtic tOOl
Oil through the HOSE ADAPTER (1) be-
fore each use, or every hour if used con-
tinuously.
3.
Apply a few drops of oil to the LEVER (4) as shown in Figure 6. Work the LEVER a few
times to lubricate.
Hose Adapter (1)
Lever (4)
Figure 6 — Lubrication Points
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 9
PARTS LIST
item
1
description
Hose Adapter
Q’ty
1
item
description
Q’ty
1
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Cap
2
O-Ring
1
Angle Housing
Spindle
1
3
Spring
1
1
4
Lever
1
Gear
1
5
Valve Pin
Housing
1
Collet
1
6
1
Collet Nut
Ball Bearing
Ball Bearing
Collet Nut
Exhaust Sleeve
Valve Screw
Lubricator
Pin
1
7
Pin
1
1
8
Sealing Gasket
Ball Bearing
Rear Plate
Steel Ball
Rotor
1
1
9
1
1
10
11
12
13
14
15
23
24
25
26
1
1
1
1
1
1
Rotor Blade
Cylinder
4
1
1
Spring
1
Bearing Spacer
Front Plate
Ball Bearing
Bevel Gear
Cap Lock
1
Safety Lock
Bush
1
1
1
1
Semi-Circular Key
Wrench
1
1
2
1
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
pleASe reAd tHe FOllOwing cAreFully
THE MANUFACTURERAND/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 OFANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO
MAKEANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACEANY PARTS
OF THE PRODUCT. IN FACT, THE MANUFACTURERAND/OR DISTRIBUTOR EXPRESSLY STATES THAT
ALLREPAIRSAND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BYCERTIFIEDAND 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 93088
For technical questions, please call 1-800-444-3353.
Page 10
ASSeMBly diAgrAM
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 11
liMited 90 dAy wArrAnty
Harbor Freight Tools Co. makes every effort to assure that its products meet high qual-
ity 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, nor-
mal 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 WAR-
RANTY 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 trans-
portation 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.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
reV 07i
SKU 93088
For technical questions, please call 1-800-444-3353.
Page 12
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