INSTRUCTION MANUAL
AIR-POWERED
RIGHT ANGLE DIE GRINDER
058-7713-6
TABLE OF CONTENTS
2
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
QUICK START GUIDE
TECHNICAL SPECIFICATIONS 3
SAFETY GUIDELINES 4–9
KEY PARTS DIAGRAM 10
IMPORTANT INFORMATION 11–13
OPERATING INSTRUCTIONS 14–15
MAINTENANCE 16–17
TROUBLESHOOTING 18–19
EXPLODED VIEW 20
PARTS LIST 21
WARRANTY 22–23
SAFETY GUIDELINES
4
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Safety guidelines
This manual contains information that relates to PROTECTING PERSONAL SAFETY and PREVENTING
EQUIPMENT PROBLEMS. It is very important to read this manual carefully and understand it
thoroughly before using the product. The symbols listed below are used to indicate this information.
Note- The word “Note” is used to inform the
reader of something he/she needs to know about
the tool.
PERSONAL SAFETY
These precautions are intended for the personal safety of the user and others working with the user.
Please take time to read and understand them.
DANGER!
Potential hazard that will result in serious
injury or loss of life.
WARNING!
Potential hazard that could result in
serious injury or loss of life.
CAUTION!
Potential hazard that may result in
moderate injury or damage to equipment.
SAFETY GUIDELINES
5
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
SAFETY GUIDELINES
DANGER!
Potential hazard that will result in serious injury or loss of life.
• Keep children away from the work area. Do not allow children to handle
power tools.
• Do not use a tool that is leaking air, that has missing or damaged parts, or
that requires repairs. Verify that all screws are securely tightened.
• Never attempt to override tool safety features.
• Do not use oxygen or any other combustible or bottled
gas to power air-powered tools. Failure to observe this
warning can cause explosion and serious personal injury
or death. Use only the compressed air to power airpowered tools. Use a minimum of 25' (7.6 m) of hose to
connect the tool to the compressor. Failure to comply will
result in serious injury or loss of life.
• Risk of electric shock: Do not expose a compressor to rain. Store it indoors.
Disconnect the compressor from the power source before servicing.
Compressor must be grounded. Do not use grounding adaptors.
• Risk of personal injury: Do not direct compressed air from the air hose
toward the user or other personnel.
Oxygen
Hydrogen
Explosive
Combustible
MC-OM-02
SAFETY GUIDELINES
6
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
• Risk of inhallation: Never directly inhale the air produced by the compressor.
• Risk of bursting: Do not adjust the pressure switch or safety valve for any
reason. They have been preset at the factory for this compressor’s maximum
pressure. Tampering with the pressure switch or the safety valve may cause
personal injury or property damage.
• Risk of burns: The pump and the manifold generate high temperatures. In
order to avoid burns or other injuries, do not touch the pump, the manifold,
or the transfer tube while the compressor is running. Allow the parts to cool
down before handling or servicing. Keep children away from the compressor
at all times.
• Risk of bursting: Make sure the regulator is adjusted so
that the compressor outlet pressure is set lower than the
maximum operating pressure of the tool. Before starting
the compressor, pull the ring on the safety valve to make
sure the valve moves freely. Drain water from tank after
each use. Do not weld or repair tank. Relieve all pressure
in the hose before removing or attaching accessories.
MC-OM-22
SAFETY GUIDELINES
7
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
WARNING!
Potential hazard that could result in serious injury or loss of life.
•
Do not allow unskilled or untrained individuals to operate an Air-powered
Right Angle Die Grinder or any other air-powered tool.
• Always ensure that the workpiece is firmly secured leaving both hands free
to control the tool.
• Always keep your air tool clean and lubricated. Daily lubrication is essential
to avoid internal corrosion and possible failure.
• Do not overload the tool. Allow the tool to operate at its optimum speed for
maximum efficiency. Excessive overload can cause the tool casing to split,
and may also lead to excessive wear on moving parts and possible failure.
• Use only the lightweight coil hoses for connecting the tool to the
compressor coupling. Do not fit quick-change couplings onto the tool, as the
vibration can lead to damage or failure of the coupling.
• Always ensure that the tool has stopped before connecting it to the air
supply.
• Always ensure that the accessories are rated/designed for use with the tool.
• Ensure that the accessories are correctly and securely fastened before
connecting the tool to the air supply. Failure to comply could result in
serious injury or loss of life.
• Locate the compressor in a well-ventilated area for cooling, at a minimum of
12" (31 cm) away from the nearest wall.
• Protect the air hose and the power cord from damage and puncture. Inspect
them for weak or worn spots every week, and replace them if necessary.
• Always wear hearing protection when using the air compressor. Failure to do
so may result in hearing loss.
• Do not carry the compressor while it is running.
• Do not operate the compressor if it is not in a stable position.
• Do not operate the compressor on a rooftop or in an elevated position that
could allow the unit to fall or be tipped over.
• Always replace a damaged gauge before operating the unit again.
SAFETY GUIDELINES
8
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
CAUTION!
Potential hazard that may result in moderate injury or damage to
equipment.
• Do not wear watches, rings, bracelets, or loose clothing when using any air
tool.
• Keep proper footing at all times in order to ensure correct balance.
• For optimal safety and tool performance, inspect the tool daily in order to
ensure free movement of the trigger, safety mechanisms, and springs.
• Keep the work area clean. A cluttered or dirty workbench may lead to an
accident. Floor should be kept clear.
• This tool is not a toy. Use it with caution.
• Handling and storage of oil: Use with adequate ventilation. Avoid contact of
oil with eyes, skin and clothing. Avoid breathing spray or mist. Store in a
tightly closed container in a cool, dry, well-ventilated area free from
incompatible substances.
• Do not use the tool near or below the freezing temperatures, as doing so
may cause tool failure.
• Do not store the tool in a freezing environment to prevent ice formation on
the operating valves of the tool, as doing may cause tool failure.
SAFETY GUIDELINES
9
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Note: Recycle unwanted materials rather than disposing of them as waste. Sort the tools, hoses, and
package in specific categories and take to the local recycling centre, or dispose of them in an
environmentally safe way.
CAUTION!
Potential hazard that may result in moderate injury or damage to
equipment.
• Disconnect the tool from the air supply and turn off the
compressor before changing accessories, before servicing
any type of tools, when the tool is not in use, when it is
being handed to another person, and when it is left
unattended. Failure to comply may result in moderate injury
or damage to equipment.
• Use safety goggles and ear protection:
Wear safety glasses with side shields when operating the
tool/compressor and verify that others in the work area are
also wearing safety glasses. Safety glasses must conform to
American National Standards Institute (ANSI Z87.1)
requirements and must provide protection from flying
particles from the front and the sides.
Air-powered tools are loud and the sound can cause hearing
damage. Always wear ear protection to help prevent hearing
damage and loss. Failure to comply may result in moderate
injury.
MC-587713-01
MC-OM-01
KEY PARTS DIAGRAM
10
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
No. Description No. Description
1 Air inlet plug 3 Safety lock
2 Trigger 4 Chuck screw
MC-587713-02
1
2
3
4
IMPORTANT INFORMATION
11
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Compatible compressors
GUIDELINES FOR PROPER USE AND OPERATION
Be sure to use a proper air compressor with Mastercraft
®
air-powered tools. The compressor should
be able to supply a minimal air delivery of 2.2 SCFM @ 90 PSI to ensure the compressor can run
continuously with the Mastercraft Air-powered Right Angle Die Grinder.
General use
This Mastercraft® Air-powered Right Angle Die Grinder is provided with an automatic in-line filterregulator-lubricator for increased tool life and for maintaining the tool in sustained operation mode.
The Air-powered Right Angle Die Grinder has a durable, lightweight composite housing that helps in
reducing vibration. The grinder is provided with a safety lock. The in-line lubricator has to be
regularly checked and filled with pneumatic tool oil. The in-line lubricator has to be adjusted properly
by placing a sheet of paper next to the exhaust ports and holding the throttle opened for about 30
seconds. The lubricator is properly set when a light stain of oil is formed on the paper. Excessive
amounts of oil should be avoided. The tool is ideal for light welding, grinding, porting, and polishing
applications.
In the event of storage of the tool for an extended period of time (overnight, weekend, etc.),
generous amount of lubrication must be provided. The tool should be run for approximately 30
seconds to ensure that oil has been uniformly distributed throughout the tool. The tool should be
stored in a clean and dry environment.
Air Compressor
Size & Power
2 HP 2 1/2 HP 3+ HP
6 Gallons
Light duty and
intermittent use
Light duty and
intermittent use
Medium duty and
intermittent use
8 - 11 Gallons
Light duty and
intermittent use
Medium duty and
intermittent use
Heavy duty and
continuous use
15+ Gallons
Medium duty and
intermittent use
Heavy duty and
continuous use
Heavy duty and
continuous use
IMPORTANT INFORMATION
12
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Air system
• Always use clean, dry, regulated, compressed air at the recommended pressure
(see section
“Technical specifications”)
.
• Maintain the air pressure at 90 PSI and air flow according to the recommended specifications.
Do not exceed the maximum or minimum pressures. Operating the tool at the inappropriate
pressure (too low or too high) will cause excessive noise or rapid wear of tool.
• Increase line pressure to compensate for unusually long air hoses, where the minimum hose
diameter has to be 1/4
" ID and the fittings used must have same dimensions.
• Ensure that air valve is in “off” position before connection to the air supply.
• Clean the filter and the air inlet on a weekly basis.
• Clean the compressor tank daily as water in the air supply line can damage the angle die
grinder.
• Verify that all connections in the air supply system are sealed in order to prevent air leakage.
No. Description No. Description
1
Mastercraft
®
Air-powered Right Angle Die
Grinder
5Filter
2Air hose 6Cut-off valve
3Lubricator 7Air compressor
4 Regulator (0 to 8.5 bar)
MC-587713-03
3
5
1
4
6
7
2
IMPORTANT INFORMATION
13
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Read this Instruction Manual carefully before using the tool.
• Read and follow all the safety instructions at the beginning of this manual. Inspect the
Air-powered Right Angle Die Grinder prior to each use in order to:
– Ensure that the proper power source is being used.
– Verify that the tool is in proper working order.
WARNING!
Potential hazard that could result in serious injury or loss of life.
• Do not use the tool if it is not in proper working order.
• Do not use oxygen, CO
2
(carbon dioxide), or any other combustible, or bottled
gas to power this tool.
• Do not use this tool in the presence of any flammable liquids or gases. Failure
to comply could result in serious injury or loss of life.
OPERATING INSTRUCTIONS
14
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Loading and operation
1. Disconnect the tool (1) from the air hose
(2)
(fig A)
.
2. Use the two wrenches (1) to loosen the
chuck (2). Insert a suitable grinding
accessory into chuck, and firmly
retighten the chuck to lock the grinding
accessory in place using the wrenches
(fig B)
.
DANGER!
Potential hazard that will result in serious injury or loss of life.
• Do not use grinding accessories other than those that are specifically
designed for use with an Air-powered Right Angle Die Grinder. Failure to
comply will result in serious injury or loss of life.
MC-587713-04
fig A
2
1
MC-587713-05
fig B
2
1
OPERATING INSTRUCTIONS
15
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
3. Plug in compressor, turn it on set the
pressure regulator to 90 PSI, attach one
end of the air hose to the compressor
and the other end of the air hose (1) to
the tool (2). Use plumber’s tape to avoid
air leak (see section “Technical
specifications”) (fig C).
4. With a firm grip on the tool, lightly press
the trigger (1) and apply accessory to
workpiece, slowly and steadily moving
tool until achieving desired finish on the
workpiece
(fig D)
.
MC-587713-06
fig C
2
1
MC-587713-07
1
fig D
WARNING!
Potential hazard that could result in serious injury or loss of life.
• Hold the tool firmly with both hands. Always point abrasive material away
from you while operating the tool. Failure to comply could result in serious
injury or loss of life.
MAINTENANCE
16
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Maintenance
DANGER!
Potential hazard that will result in serious injury or loss of life.
• Disconnect the tool from the air compressor before performing maintenance/
service, adjusting, and when it is not in use.
• Repairs must be performed by a qualified service technician only. Failure to
comply will lead to serious injury or loss of life.
MAINTENANCE
REQUIRED
DESCRIPTION
TOOLS OR
MATERIALS
REQUIRED
MAXIMUM SERVICE INTERVAL
Each use or
every 2 hrs.
Monthly
As
Needed
In-depth inspection
Worn or
broken parts
X X
Replace worn or
broken parts
X
Lubrication See below
Pneumatic tool
oil
X
• Lubrication: If the Air-powered Right Angle Die
Grinder and compressor are not equipped with an
in-line lubrication system, place up to 6 drops of
pneumatic tool oil into the air inlet before each
work day or after every 2 hours of continuous use,
depending on the characteristics of the workpiece
used.
MC-587713-09
MAINTENANCE
17
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
• Clean the Air-powered Right Angle Die Grinder after use.
• Check the air supply for power loss or erratic action due to the following reasons:
– excessive drain, moisture, or restriction on the air pipe.
– improper size or type of hose connectors.
• Check whether there are grit or gum deposits in the grinder, flush the grinder with gum
solvent oil or an equal mixture of SAE No 10 oil and paraffin, and allow tool to dry before use.
• Disconnect the tool from the air supply, clean the tool, and store the tool in a safe, dry,
childproof location.
Note: When temperatures are below freezing, maintain the tool in a warm condition using any safe,
convenient method.
TROUBLESHOOTING
18
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Troubleshooting
The following chart lists common issues and solutions. Please read it carefully and follow all
instructions closely.
DANGER!
Potential hazard that will result in serious injury or loss of life.
• If any of the following symptoms appear while the tool is in use, turn it off and
disconnect it from the air supply immediately. Failure to comply will lead to
serious injury or loss of life.
• Disconnect the tool from the air supply before making any adjustments.
• Repairs must be performed by a qualified service technician only.
PROBLEM POSSIBLE CAUSES SOLUTIONS
Tool runs at normal
speed but loses
control under load.
1. Worn or damaged motor parts.
2. Cam clutch is worn or stuck due
to insufficient lubrication.
1. Lubricate clutch housing.
2. Check for excess clutch oil as the clutch
requires only fifty percent of oil fill.
Overfilling can cause dragging of high speed
parts.
Grease Lubrication: Heat usually indicates an
insufficient amount of grease. Severe operating
conditions may require frequent lubrication.
Tool runs slowly and
air flows slightly
from exhaust.
1. Motor parts are jammed.
2. Power regulator is in closed
position.
3. Air flow is blocked due to dirt.
1. Check filter and air inlet for blockage.
2. Pour pneumatic tool oil into air inlet as per
instructions.
3. Operate the tool in forward and/or reverse
rotations within short duration.
Repeat the above steps as per requirements. If
this fails, return the tool to the service center.
TROUBLESHOOTING
19
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Note: For further repair information, please call 1-800-689-9928.
Tool is not running.
Air flows freely from
exhaust.
Motor vanes are stuck due to
material build up.
1. Pour pneumatic tool oil into air inlet.
2. Operate the tool in forward and/or reverse
rotations within short duration, wherever
applicable.
3. Tap motor housing gently with plastic mallet.
4. Disconnect the air supply. Operate the motor
manually by rotating drive shank, wherever
applicable.
5. If tool remains jammed, return to service
center
.
Tool does not shut
off.
O-rings or throttle valve is dislodged
from valve seat .
1. Replace O-rings or return to service center.
PROBLEM POSSIBLE CAUSES SOLUTIONS
EXPLODED VIEW
20
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
MC-587713-08
1
2
3
5
6
7
8
9
4
10
30
31
32
34
35
11
45
46
14
15
6
19
20
26
27
22
28
29
16
17
18
21
18
24
25
36
37
38
39
40
41
42
43
44
12
13
23
33
PARTS LIST
21
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
If any parts are missing or damaged, or if you have any questions, please call 1-800-689-9928.
No. Description Qty. No. Description Qty.
1 Chuck screw
1
24 Back cover 1
2 Chuck
1
25 Bearing
1
3 Axis of rotation
1
26 Housing
1
4 Semicircular key
1
27 Lable 2
1
5 Screw set
1
28 Muffler cover
1
6 Bearing
2
29 Air inlet
1
7 Gear wheel
1
30 Pin 3 X 18
1
8 Bearing
1
31 Spring
1
9 L switch
1
32 Trigger pin
1
10 Oil valve
1
33 Trigger ring
1
11 Screw cap
1
34 Pin 3 X 24
1
12 Lock nut
1
35 Trigger
1
13 O-ring 22.4 X 1.8
1
36
Label 1 1
14 Front cover
1
37
O-ring 4.6 X 1.6
1
15 Gear wheel
1
38 O-ring 5.6 X 2
1
16 Front plate
1
39 Valve stem
1
17 Pin 1.5 X 4
1
40 Spring
1
18 Pin 2 X 6
2
41 Air regulator
1
19 Bushing
1
42 O-ring 7 X 2
1
20 Washer
1
43 O-ring 11 X 2
1
21 Cylinder
1
44 Screw cap
1
22 Rotor
1
45 Wrench I
1
23 Rotor blade
4
46 Wrench II
1
WARRANTY
22
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
Mastercraft® limited warranty
These warranties are subject to the following conditions and limitations:
a. A bill of sale verifying the purchase and purchase date must be provided.
b. This warranty will not apply to any product or part thereof which is worn or broken or which
has become inoperative due to abuse, misuse, accidental damage, neglect, or lack of proper
installation, operation, or maintenance (as outlined in the applicable instruction manual or
operating instructions), or which is being used for industrial, professional, commercial, or
rental purposes.
c. This warranty will not apply to normal wear and tear or to expendable parts or accessories
that may be supplied with the product which are expected to become inoperative or unusable
after a reasonable period of use.
d. This warranty will not apply to routine maintenance and consumable items such as, but not
limited to, fuel, lubricants, vacuum bags, blades, belts, sandpaper, bits, fluids, tune-ups, or
adjustments.
e. This warranty will not apply where damage is caused by repairs made or attempted by others
(i.e., persons not authorized by the manufacturer).
f. This warranty will not apply to any product that was sold to the original purchaser as a
reconditioned or refurbished product (unless otherwise specified in writing).
This Mastercraft
®
product is guaranteed for a period of 3
years from the date of original retail purchase against
defects in workmanship and materials, except for the
following component:
Component A: Accessories, which are guaranteed for a
period of 1-year from the date of original retail purchase
against defects in workmanship and materials.
Subject to the conditions and limitations described below,
this product, if returned to us with proof of purchase within
the stated warranty period and if covered under this
warranty, will be repaired or replaced (with the same model,
or one of equal value or specification), at our option. We will
bear the cost of any repair or replacement and any costs of
labor relating thereto.
WARRANTY
23
AIR-POWERED RIGHT ANGLE DIE GRINDER 058-7713-6
g. This warranty will not apply to any product or part thereof if any part from another
manufacturer is installed therein or any repairs or alterations have been made or attempted by
unauthorized persons.
h. This warranty will not apply to normal deterioration of the exterior finish, such as, but not
limited to, scratches, dents, paint chips, or to any corrosion or discoloring by heat, or
abrasives and chemical cleaners.
i. This warranty will not apply to component parts sold by and identified as the product of
another company, which shall be covered under the product manufacturer’s warranty, if any.
Additional limitations
This warranty applies only to the original purchaser and may not be transferred. Neither the retailer
nor the manufacturer shall be liable for any other expense, loss or damage, including, without
limitation, any indirect, incidental, consequential, or exemplary damages arising in connection with
the sale, use, or inability to use this product.
Notice to consumer
This warranty gives you specific legal rights, and you may have other rights, which may vary from
province to province. The provisions contained in this warranty are not intended to limit, modify, take
away from, disclaim, or exclude any statutory warranties set forth in any applicable provincial or
federal legislation.
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