90º Air-powered Angle Die Grinder
058-8076-6
Operation Manual
Parts Missing or Damaged? Questions? Toll-Free Help Line - 1-800-689-9928
IMPORTANT: Ensure that all users have read all safety rules and
operating instructions carefully before using this product. Keep this
Owner's Manual in a safe place for future reference.
TABLE OF CONTENTS
Specifications .……………………………………………………………………………………………….2
Safety Guidelines .………………………………………………………………………………...............2
Know Your Air-powered Angle Die Grinder………………………………………………………………..3
Before You Start ………………………………………………………………………...............................3
Operating Instructions .……………………………………………………………………………………...4
Maintenance .…………………………………………………………………………………………………5
Troubleshooting .……………………………………………………………………………………………..6
Parts Schematic .…………………………………………………………………………………………….7
Parts List .…………………………………………………………………………………………………….7
Warranty .……………………………………………………………………………………………………..8
SPECIFICATIONS
Product Number ……………….........................................................................................058-8076-6
Collet Size……………….................................................................................................1/4” (6.0 mm)
Operating Pressure ………………............................................................................................90 PSI
Free Speed ………………................................................................................................18,000 RPM
Minimum Hose Size ………………..................................................................................3/8” (10 mm)
Average Air Consumption ……………….............................................................3.0 SCFM (85 l/min)
Weight ………………...............................................................................................1 lb 12 oz (0.8 kg)
Tool Dimension ………………...........................................................................................7” (178 mm)
SAFETY GUIDELINES
Failure to follow these instructions could result in severe personal injury to the operator and bystanders or damage to the tool and property.
Read all instructions in this manual carefully and understand them thoroughly before
using the air-powered angle die grinder. Ensure that anyone who operates the tool has
read and understood these instructions.
1. Always wear safety goggles or glasses and hearing protection. When necessary due to
the nature of the work, also wear respiratory protection (see Fig. 1).
2. WARNING: Always ensure that the work area is clear of any flammable materials,
liquids or gasses as the use of this tool may create sparks.
3. Never use oxygen, or any other combustible bottled gas as a power source as this
could cause explosion and serious personal injury (see Fig. 2).
4. Use the tool only in a well-ventilated area!
5. Always ensure machine is switched off before connecting to air supply.
6. Disconnect machine from the air supply before changing bits, and before servicing any
type of machine.
7. Always keep your air tool clean and lubricated. Daily lubrication is essential to avoid
internal corrosion and possible failure.
8. Do not wear watches, rings bracelets or loose clothing when using air tools.
9. Use only light weight coil hoses from a tool to the wall or compressor coupling.
10. Do not overload the machine. Allow the tool to operate at its optimum speed for maximum
efficiency.
11. Do not increase the air pressure above the manufacturers recommended level. This
causes excessive wear on moving parts and possible failure.
12. Always ensure that the machine has stopped before putting it down after use.
13. Always ensure that the workpiece is firmly secured leaving both hands free to control the
machine.
14. Always ensure that the accessories such as bits are rated/designed for use with the machine. Also ensure they
are correctly and securely fastened before connecting the machine to the air supply.
15. When working always wear an appropriate face mask or respiratory equipment.
16. DO NOT direct air from the air hose at yourself or others.
17. When not in use disconnect from air supply and store in a safe, dry, childproof location.
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DANGER
WARNING
Figure 1
Figure 2
KNOW YOUR 90°AIR-POWERED ANGLE DIE GRINDER
STANDARD EQUIPMENT
14 mm collet wrench 1
19 mm collet wrench 1
BEFORE YOU START
General Usage Description:
This Mastercraft®Maximum Air-powered Angle Die Grinder features a non-slip, ergonomic soft-grip for greater operator comfort and fatigue reduction. Its double-bearing spindle gives it excellent concentricity and minimal vibration. A
swivel rear-exhaust enables the user to direct exhaust air and the accompanying dust away from him or herself.
Compatible Compressor & Air Tool - Guidelines for Proper Usage & Operation
Always ensure the use of appropriately matched air tools and compressors. Be sure that the air compressor being
used can supply the appropriate volume, pressure and delivery rate of air to the tool(s) without running continuously.
Using tools or combinations of tools that together or separately require more than the air compressor can deliver will
reduce performance and could void the compressor or tool guarantee/warranty.
Air System
1. Always use clean, dry and regulated, compressed air at a working pressure of between 75 and 90 PSI (between
5.2 and 6.3 Bar).
2. Never exceed the maximum pressure of 90 PSI (6.3 Bar). Operating the tool with excessive pressure could cause
personal injury, and may result in excessive noise and damage to the tool.
3. Keep hands and other parts of the body away from the tool's discharge and working areas when connecting the
air supply.
4. It is recommended that a filter-regulator-lubricator be used, and that it be located as close to the tool as possible
(see Fig. 4).
5. If a filter-regulator-lubricator is not installed, place up to 6 drops of compressor oil into the NPT inlet plug before
each use.
6. If a filter-regulator-lubricator is installed, keep the air filter clean. A dirty filter will reduce the air pressure to the
tool, which will cause a reduction in power, efficiency, and general performance.
7. For optimal performance, install a quick connector to the tool and a quick coupler on the hose, if applicable.
8. Verify that all of the connections in the air supply system are sealed in order to prevent air from leaking.
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Safety Trigger
Collet
Exhaust Vent
Trigger
BEFORE YOU START - AIR TOOLS
Read this Owner's Manual carefully before using the air-powered angle die grinder.
1. Read and follow all of the Safety Guidelines at the beginning of this Manual.
2. Inspect the air-powered angle die grinder prior to each use in order to:
a) ensure that the proper power source is being used;
b) verify that the tool is in proper working order.
3. Do not use a tool that is not in proper working order.
4. Do not use oxygen or any other combustible or bottled gas to power this tool.
5. Do not use this tool in the presence of flammable liquids or gases.
6. Only use bits that are specifically designed for use with this air-powered angle die grinder. Bits must be rated at
or above the 18,000 RPM speed rating of this tool.
7. This air-powered angle die grinder requires an air pressure of 90 PSI (6.3 Bar) and air flow according to the
specifications that appear at the beginning of this Manual.
8. Drain the air tank daily. Water in the air line will damage the air-powered angle die grinder.
9. Clean the air inlet filter weekly.
10. The pressure in the line should be increased in order to compensate for an unusually long air hose (longer than
26' [8 m]). The diameter of the hose should be 3/8” (10 mm) ID.
11. Keep the hose away from heat, oil, and sharp edges. Check the hose for wear, and verify that all connections
are secure.
BEFORE YOU START - BIT INSTALLATION
Be sure to securely tighten the bits and accessories in the grinder.
1. To install an abrasive bit, you will need to use 2 open-ended wrenches that .
came with the tool.
2. Rotate the 2 open wrenches to tighten or release the collet.
3. Before applying the bit to the workpiece, allow the tool to operate at
maximum speed for 10-20 seconds to ensure the bit is securely fastened into
the tool.
OPERATING INSTRUCTIONS
Read all instructions in this manual carefully and understand them thoroughly before using the air-powered angle die grinder.
1. Only use bits and accessories that are specifically designed for use with an air-powered angle die grinder
2. Turn on the air compressor and allow air tank to fill.
3. Set the air compressor's regulator to 90 PSI (6.2 bars). This tool operates at a maximum pressure of 90 PSI (6.2
bar) maximum air pressure.
4. Connect the grinder to the air hose.
5. This tool is equipped with a safety trigger. Flip the stopper out of the way prior to
depressing the trigger.
6. Apply air-powered angle die grinder to the workpiece.
7. Verify that the air supply is clean, and that it does not exceed 90 PSI (6.2 Bar) while
operating the air-powered angle die grinder. Dust, corrosive fumes and/or excessive
moisture can ruin the internal components of a pneumatic tool.
8. Keep children away from the tools and workplaces.
9. Bits and accessories can become hot through use. Use care .
when removing bits from the grinder.
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WARNING
WARNING
CAUTION
MAINTENANCE
Clean and inspect your tool every time you use it
The tool owner and operator are responsible for assuring that the tool is kept in safe working order. Furthermore only
service personnel trained by the manufacturer or distributor should repair the tool.
Always disconnect the air supply before commencing any cleaning or inspection and
remember to correct all the problems before beginning any repair work.
STORAGE
If it is necessary to store the tool for an extended period of time, apply a generous amount of lubrication before storing. The tool should be run for approximately 30 seconds in order to ensure that the lubrication is evenly distributed
throughout the tool. The tool should be stored in a clean and dry environment.
ITEM DESCRIPTION/REASON SERVICE INTERVAL
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CAUTION
Lubricate the tool
If the tool is used without an in-line lubricant
then be sure to put in about 3 drops of lubricant at the start of each workday and 3 drops
for every 30-minutes of use thereafter.
Each workday & every 30-minutes of use.
Cleaning
Wipe tool clean and inspect tool for wear or
damage. Use non-flammable cleaning solutions to wipe the tool. Never soak the tool in
these solutions as they can cause internal
damage.
Each use
Tighten Screws
Always ensure that all of the screws are kept
tight as loose screws can cause injury or can
damage the tool.
Check each usage. Tighten as necessary.
TROUBLESHOOTING
If any of the following problems appears while operating the tool, stop using the tool
immediately, or serious personal injury could result. Only authorized service centre
should perform repairs on this tool. Disconnect the electrical plug and disconnect any
tools from air supply before attempting any adjustment.
NOTE: Troubleshooting problems may have similar causes and solutions.
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SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
The tool runs at normal
speed, but loses power
under load.
• Motor parts are worn.
• The cam clutch is worn or sticking due to
insufficient lubrication.
• Lubricate the clutch housing.
• Check for excess clutch oil. Clutch cases should
only be filled halfway. Overfilling may cause drag
on high-speed clutch parts. A typical oiled/lubricat
ed hammer requires 1/2 oz (1.5 ml) of oil.
GREASE/LUBRICATION NOTE: Heat usually
indicates insufficient grease in the chamber. Harsh
operating conditions may require more frequent
lubrication.
If the problem persists, contact the Toll-Free
Helpline, at 1-800-689-9928.
The tool runs slowly.
The air flows slightly
from the exhaust.
• Dirt particles have gotten jammed in motor.
• The power regulator is in the closed
position.
• The air flow is blocked by dirt.
• Check the air inlet filter for blockage.
• Pour air tool lubricating oil into the air inlet, as per
instructions.
• Operate tool in short bursts quickly reversing
rotation back and forth where applicable.
• Repeat above as needed.
The tool will not run.
The air flows freely
from the exhaust.
• One or more of the motor vanes is stuck
due to material build-up.
• Pour air tool lubricating tool into air inlet.
• Operate tool in short bursts of forward and/or
reverse rotation where applicable.
• Tap motor housing gently with plastic mallet.
• Disconnect air supply. Free motor by rotating drive
shank manually.
If the problem persists, contact the Toll-Free
Helpline, at 1-800-689-9928.
The tool will not shut
off.
• The throttle valve O-rings have dislodged
from the seat in the inlet valve.
• Replace “O-ring”.
Contact the Toll-Free Helpline, at
1-800-689-9928.
Note: Repairs must be performed by a qualified service technician. For more information, contact the Toll-Free Helpline, at 1-800-689-9928.
WARNING
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PARTS SCHEMATIC
01 SCREW 1
02 O-RING (P. 12) 1
03 O-RING (P. 8) 2
04 AIR REGULATOR 1
05 SPRING 1
06 VALVE STEM BUSHING 1
07 VALVE STEM 1
08 O-RING (3.5*1.4) 1
09 AIR INLET (18) 1
10 EXHAUST SLEEVE 1
11 O-RING (26.7*1.78) 1
12 SPRING PIN 1
13 LEVER 1
14 PROTECTING RUBBER 1
15 HOUSING 1
16 BEARING (696ZZ) 1
17 REAR PLATE 1
18 PIN 2
19 ROTOR BLADE 4
20 ROTOR 1
21 CYLINDER 1
22 CONE MUFFLER 1
23 BEARING SPACER 1
24 FRONT PLATE 1
25 BEARING (608ZZ) 3
26 BEVEL GEAR(18T) 1
27 NUT 1
28 CLAMP NUT 1
29 ANGLE HOUSING 1
30 OIL CUP 1
31 BEVEL GEAR (20T) 1
32 BEARING (6000ZZ) 1
33 SHAFT 1
33A SNAP RING 1
34 CLAMP NUT 1
35 COLLET (1/4") 1
36 COLLET NUT 1
37 KEY 1
38 STOP SPANNER 14M/M 1
39 STOP SPANNER 19M/M 1
Item
Number Descriptions QTY
Item
Number Descriptions QTY
PARTS LIST
MASTERCRAFT®MAXIMUM LIMITED WARRANTY
This MASTERCRAFT®MAXIMUM product is guaranteed for a period of five (5) years from the date of original retail
purchase against defects in materials and workmanship.
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
labour relating thereto.
This warranty is 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 owner's 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);
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 discolouring by heat, abrasive and chemical cleaners; and
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.
Imported by Mastercraft Canada Toronto, Canada M4S 2B8
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