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Industrial Series
ATG-135M
MiCRO DIE GRINDER
INSTRUCTION MANUAL
Order Code: A043
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Safety Air Tool Warnings
1. Read and understand this entire manual before
attempting assembly or operation.
2. Read and understand all warnings posted on
the tool and in this manual. Failure to comply
with all of these warnings may cause serious
injury.
3. Replace warning labels if they become
obscured or removed.
4. Do not use this tool for other than its intended
use. If used for other purposes, Toolmaster
disclaims any real or implied warranty and
holds itself harmless from any injury that may
result from that use.
5. Always wear approved safety glasses or face
shield while using this tool. (Everyday eye
glasses only have impact resistant lenses; they
are not safety glasses.)
6. Wear ear protectors (plugs or muffs) if the
noise exceeds safe levels.
7. Wear gloves and protective clothing if
operationproducessparksoryingparticles.
Glovesshouldbetight-tting,withoutfrayed
ngersorhangingthreads.Keephandsand
body away from the working area of tool.
13. Adopt a comfortable posture with proper
balance,and maintain secure footing at all
times. Non-slip footwear or anti-skid oor strips
are recommended.
14. Do not wear loose clothing or jewellery. Conne
long hair.
15. Excessive air pressure and too much free
rotation may decrease life of the tool and may
cause a hazardous situation.
16. Check air hoses for wear, and keep them away
from heat and sharp edges. Repair or replace
damaged air hose immediately. Do not carry
tool by the air hose.
17. Air hose may cause tripping hazards; keep hose
away from trafc areas.
18. Do not use this tool near ammable objects, or
in potentially explosive environments. Do not
use near live electrical wires.
19. Do not use power tools in damp or wet location,
or expose them to rain. Keep work area well
lighted.
8. Do not operate an air tool continually at full
throttle without a work load on the tool.
9. The air tool must be properly lubricated
before operating.
10. Never start a percussion type air tool (chipper,
breaker, buster, etc.) without securing the
tooling in the retainer and placing the tip
against the work surface.
11. Do not operate air tool without its guards in
place. Do not modify the tool.
12. Do not operate this tool while tired or under the
inuence of drugs, alcohol, or any medication.
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20. Do not leave a connected tool unattended.
When not in use, disconnect tool from air
source.
21. Shut off air supply and discharge any residual
pressure from tool before removing hose,
making adjustments, changing accessories, or
storing tool.
22. Make sure tool is switched off, and your nger
off the trigger, before connecting to air supply.
Remove adjusting keys before operating
24. Keep visitors a safe distance from the work
area. Keep children away.
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Safety Specic For Die Grinders.
1. This die grinder is designed for deburring,
polishing, grinding and surface preparation. If
you are not familiar with the proper and safe
operation of a pneumatic die grinder, do not
use until proper training and knowledge have
been obtained.
2. Speed rating of tool attachment must equal or
exceed rated free speed of die grinder.
3. Make sure attachment is securely inserted
into collet and collet nut is tight.
Warning: Some dust, fumes and gases created by power sanding, sawing, grinding,
drilling, welding and other construction activities contain chemicals that may cause cancer and birth
defects or other reproductive harm. Some examples of these chemicals are:
• lead from lead based paint
• crystalline silica from bricks, cement and other masonry products
• arsenic and chromium from chemically treated timber
Your risk of exposure 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 dust masks that are specifically designed to filter out microscopic particles
4. Make sure workpiece is secure and will not
shift while operating die grinder. Do not hold
workpieces with your hand.
5. Use only attachments designed for the collet
size of die grinder. Do not modify an
attachment or use bushings, wheel anges,
etc., to mount an attachment of incorrect size.
Technical Specications
Collet Size
Length
Free Speed:
Air Consumption
Maximum Air Pressure
Speed Setting
Noise level
Recommended Air Hose
Inlet
Weight
3mm
159mm
54,000rpm
5 CFM (142 L/min)
90 PSI
Variable
90dB
10mm
1/4” BSPT
0.35kg
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Setup
Any missing parts or damage should be reported immediately to your Toolmaster distributor. Do not use
a damaged tool. Read this instruction manual thoroughly for operation, maintenance and safety
instructions. The diagram below is the ideal setup position. The lubricator is optional and if not used, then
a few drops of Pneumatic Tool Oil need to be added to the airline connection before operation. Add a few
more drops after each hour of continual use.
Air Supply
The recommended air system is shown in Fig.1.
1. Use proper air hose size (refer to tool specications). The hose should be just long enough to
serve the working area. Excessive hose length will cause pressure drop.
WARNING! Ensure that the air supply is clean and does not exceed 90psi. Too high an air
pressure and/or unclean air will shorten the life of the air tool due to accelerated wear,
and may cause damage and/or personal injury.
2. Drain the compressor air tank daily. Water in the air line will damage the air tool.
3. Clean the compressor air inlet lter screen weekly.
4. Line pressure should be increased to compensate for unusually long air hoses (over 8 meters).
The minimum hose bore should be 10mm and ttings must have the same inside dimensions.
5. Keep hoses away from heat, oil and sharp edges. Check hoses for wear, and make certain that all
connections are secure.
IMPORTANT: The leader hose is optional, but connecting a quick-change coupling directly to the
tool is not recommended, as vibration may cause the connection to fail. For the best result, add a
leader hose and install any quick-change couplings further down the line.
ompressor
C
itting
oupler
C
& F
ose
H
ir
A
F
ilter
r
ubriCAtor
l
egulAtor
ose
H
ir
A
eAder
l
ose
H
ool
t
Fig. 1
WARNING: Operating the tool at pressures over the rated capacity may cause severe
damage and/or personal injury. Do not exceed 90 PSI while operating the tool. Do not
use an accessory rated at a lower maximum pressure than the tool.
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Operating Instructions
1. Disconnect the air tool from the air line.
2. Loosen collet nut using the two wrenches on the ats of the collet nut and spindle. Keep the
spanner on the spindle stationary while turning wrench on collet nut. (See Fig.2)
3. Install grinding attachment into the collet, and retighten the collet nut securely with the
spanners.
4. If an automatic oiler is not used, add a few drops of Pneumatic Tool Oil to the airline connection
before use. Add a few drops more after each hour of continual use.
5. Remove protective cap from the air inlet and t a male quick change tting, (Fig. 2)
6. Connect the air line to the die grinder.
7. Select speed by adjusting the twist throttle.
8. The twist throttle design provides variable speed control and stays constant until you decide to
change it.
9. Apply light pressure to move the Air Grinder on the material.
CAUTION! TO PREVENT INJURY FROM TOOL OR ACCESSORY FAILURE:
Do not exceed the tool’s maximum air pressure rating. If the tool still does not have sufficient
force a maximum pressure and sufficient airflow, then a larger tool may be required.
10. To prevent accidents, turn off the tool, detach the air supply, safely discharge any residual air
pressure in the tool, and release the throttle and/or turn the switch to its off position after use.
Clean external surfaces of the tool with clean, dry cloth, and apply a thin coat of tool oil, then store
the tool indoors out of children’s reach.
Collet nut
spindle
Housing
Fig. 2
operAting trigger
oFF
Ê
Ê
on
Air Hose
Fig. 3
CAUTION! High pressure air can cause injury
Shut off air valve and vent all accumulated air
in the lines and tool before sevicing the Air
Tool.
onneCt
C
uiCk
Q
dAptor
A
ose
H
ir
A
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Optional Accessories
5 pieCe pACk - HigH-FloW Air Fittings
1/4” bspt
order Code F935
pneumAtiC tool oil 500ml
order Code A037
rWk-15 - industriAl polymer Air Hose
15 metre x Ø9.5mm id Hose
order Code H008
rWk-30 - industriAl polymer Air Hose
30 metre x Ø9.5mm id Hose
order Code H009
Maintenance
1. Daily - Air Supply Maintenance:
Every day, maintain the air supply according to the component manufacturers’ instructions.
Maintain the lubricator’s oil level. Use Pneumatic Tool Oil. (Order Code A037)
Drain the moisture lter regularly.
Performing routine air supply maintenance will allow the tool to operate more safely and will also
reduce wear on the tool.
2. Quarterly (every 3 months) – Tool Disassembly, Cleaning, and Inspection:
Have the internal mechanism cleaned, inspected, and lubricated by a qualied technician.
For a full service contact your local Toolmaster service agent.
When not in use, disconnect from air supply, clean nibbler and store in a safe and dry place.
Environmental Protection.
Recycle unwanted materials instead of disposing of them as waste.
All tools, accessories and packaging should be sorted, taken to a recycle centre
and disposed of in a manner which is compatible with the environment.
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Troubleshooting
Review the troubleshooting and procedures in this section if a problem develops with your Air Tool.
If you are still unable to resolve the problem, then contact your local Toolmaster distributer.
Symptoms Possible Cause Possible Solution
Decreased output.
Housing heats
during use
Severe air leakage
(Slight air leakage
is normal,
especially on older
tools.
Excessive heat
develops
in tool.
1.Notenoughairpressureand/orairow.
2. Obstructed throttle.
3. Incorrect lubrication or not enough
lubrication.
4. Blocked air inlet screen (if equipped).
5. Air leaking from loose housing.
6. Mechanism contaminated.
7. Vane wear or damage.
1. Incorrect lubrication or not enough
lubrication.
2. Worn parts.
1. Cross‑threaded housing components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Improper lubrication 1. Lubricate properly according to instructions in
1. Check for loose connections and make sure
thatairsupplyisprovidingenoughairow
(CFM) at required pressure (PSI) to the tool’s air
inlet. Do not exceed maximum air pressure.
2. Clean around throttle to ensure free movement.
3. Lubricate using air tool oil and grease according
to directions.
4. Clean air inlet screen of buildup.
5. Make sure housing is properly assembled and
tight.
6.Havequaliedtechniciancleanandlubricate
mechanism.Installin-linelterinairsupplyas
stated in Setup: Air Supply.
7. Replace all vanes.
1. Lubricate using air tool oil and grease according
to directions.
2.Havequaliedtechnicianinspectinternal
mechanism and replace parts as needed.
1. Check for incorrect alignment and uneven gaps.
If cross‑threaded, disassemble and replace
damaged parts before use
2. Tighten housing assembly. If housing cannot
tighten properly, internal parts may be
misaligned
3. Replace damaged components.
4. Clean or replace valve assembly.
this manual.
INDUSTRIAL AIR TOOLS
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