Sumake ST-DG9612L User manual

SUMAKE PNEUMATIC TOOLS
1/4" (6mm) Air Angle Die Grinder
ST-DG9612L, ST-DG9616L
SUMAKE INDUSTRIAL CO., LTD
4F,NO.351,Yangguang St.,Neihu District TAIPEI, TAIWAN, ZIP:114-91
Noise and Vibration:
Vibration
EN ISO 28927-12
Noise
EN ISO 15744
Remark
No Load:
1.7 m/s²
Sound Pressure Level
load: 85 dB(A)
Please always
wear ear
protector at
environment
noise level > 80
dB(A) due to
risk of impaired
hearing!
Sound power level
load: 96 dB(A)
Uncertainty
K= 1.5 m/s²
Uncertainty
K= 3dB
Specification:
Free Speed
12,000 r/min
Motor Power
1.0HP
Air Consumption
10 CFM (283 L/min)
Overall Length
9-1/7” (232mm)
Air Inlet (PT)
1/4” (6.35 mm)
Air Hose (I.D.)
3/8” (10 mm)
Air Pressure
90 psi (6.3 bar)
Net Weight
2.29 lbs (1.04 kg)
ST-DG9612(6)L-S-2206A-REF

EC DECLARATION OF CONFORMITY
We: SUMAKE INDUSTRIAL CO., LTD.
4F, No. 351, Yangguang St., Neihu District, Taipei City, Taiwan
declare in sole responsibility that the equipment
Equipment：1/4"(6MM) AIR ANGLE DIE GRINDER
Model/ Serial No.： ST-DG9612L, ST-DG9616L
to which this declaration applies, complies with these normative documents:
Machinery Directive: 2006/42/EC
and conforms to the following EN standard,
EN ISO 12100: 2010
EN ISO 11148-9:2011
Name and Signature/Position Date and Place
2022/6/15
Mike Su – Managing Director Taipei, Taiwan
ST-DG9612(6)L-D-2206A-REF

ST-DG9612(6)L-I-2206A-RE
Foreword
Sumake is a manufacturer and exporter of air
tools since established. We have devote all our
efforts in improving quality and tools’ life. As
well as the noise and vibration of tools. Bring all
of you working efficiences, profits, and enjoy
using the tool is our principle.
Features
Exceptionally versatile tool for jobs like tire
scuffing, cleaning tire moldings, porting and
relieving engines, and general high-speed
polishing and grinding. Especially useful in
confined areas.
Operator‘s instruction
1. Cautions for Use
1-1 Air pressure
Maximum performance is displayed at the proper
sanding speed, obtainable at a gauge pressure of
6.2 bar. Range-wise, this is an air pressure from
5 to 7 bar (70 to 100 psi)
57
1-2 Air line
Use a 3/8“ air hose between the compressor and
the tool . Compressed air is cooled and its water
content separated, as soon as the air leaves the
compressor.
Tool
Nipple
Coupler Recoil
hose
Leader
hose
Oiler Regulator
Water
separation Air supply
Drain
daily
A portion of the water content, however, is
condensed in the piping, and can enter the tool
mechanism, and may cause trouble. So, install an
air filter and an oiler between the compressor and
the tool. Use a 3 HP or larger compressor for each
sander.
1-3 Air hose
Clean the hose with a blast of compressed air
before connecting the hose to air tool. This will
prevent both moisture and dust within the hose
from entering the tool and causing possible rust
or malfunction. To compensate for unusually
long hose (over 25 ft), the line pressure should be
increased accordingly.
Drainage
1-4 The approved eye protector, ear-muff,
mouth-muffle, and gloves should be worn when
operate this tool.
1-5 The working place shall be well ventilated.
1-6 Release the on-off device in the case of
energy supply failure.
2. Operation, Adjusting And Replacing
Method
2-1 Fix/take away the insert tool
The figure below indicates how to fasten and
loose an insert tool. Before using this tool, one
should make sure that the insert tool is fixed in
the collet very tightly.
Loose
Fasten
One should also get a habit of checking the
weariness of the insert tool in order to increase
the efficiency and safety.
2.2 On-off device
To operate this tool, just push the lever
toward the tool itself. The tool continuously
reciprocates as one push the lever down and it
stops running released.
For the sake of safety, put it on hanger or on a
soft flat pad when not in use.
2.3 Replace and adjusting
There is no user serviceable part inside this tool.
Please send the tool to a qualified personnel or
our service section to repair or/and replace worn
parts.
3. Maintenance
3-1 Lubrication
Before connecting the hose , apply 4 or 5 drops
of #60 spindle oil at the air inlet. Use of a thicker
oil can lead to reduced performance or
malfunction. If a thicker oil is used by accident,
wipe it away immediately. Also, every 3 or 4
hours of operation, oiling is necessary.
3-2 Storage
Avoid storing the tool in a location subject to
high humidity. If the tool is left as it is used , the
residual moisture inside the tool can cause rust.
Before storing and after operation, oil the tool at
the air inlet with spindle oil and run it for a short
time.
3-3 Disposal
If the tool is too seriously damaged to be used
anymore, drop it in a resource recycling can.
Never drop it into fire.
3-4 Ordering service Parts
For further operational and handling information
or for replacement of parts and components,
contact the sale agent from whom you purchased
the tool or the service division of our company.
*In ordering parts and components, give each
part number, name and quantity.
Warning
1. This tool is not insulted for coming into
contact with electric power source.
2. It is forbidden to use this tool in explosive
atmospheres and do not put any combustible
material near the workpiece since it will emit
sparks, dust, and/or fumes when working in
certain material.
3. Prevent long hair or loose clothing from
drawing in while operate this tool.
4. Never carry the tool by hose and beware of a
whipping compressed air hose.
5. The workpiece shall be fixed by proper
device.
6. Keep your body balance and beware of the
fall of the severed workpiece.
7. Use only the suggested shaft diameter of the
insert tool. Do not use the cutting-off wheels
and routing cutter wheels as the insert tool.
8. The allowed rotating speed of the insert tool
shall higher than the die grinder. Also note
the fact that the allowed rotating speed of the
mounted point must be lower due to the
increase of the shaft length between the end
of the collet and the mounted point
(overhang). Make certain that the minimum
gripping length shall be of 10 mm.
mounted point
collet
collet nut
collet holder
LgT
D
s
L0
D = diameter of mounted point
T = length of mounted wheel
L0= overhang
s = diameter of shank
Lg= gripping length
9. Excessive air pressure not only reduce the
service life of this tool but also increase the
dander. It is better to use of a pressure
regulator to control the air pressure being
supplied to the tool.
10.It remains rotating for few second after
releasing the lever.

ST-DG9612L, ST-DG9616L
1/4"(6MM) AIR ANGLE DIE GRINDER
PARTS LIST
No. Parts No. Description Q'ty No. Parts No. Description Q'ty
1 DG9612L-01 Housing 1 24 DG9612L-24 Front End Plate 1
2 DG9612L-02 Throttle Valve Bushing 1 25 DG9612L-25 Ball Bearing 1
3 DG9612L-03 O-Ring 2 26 DG9612L-26 Gear Shaft 1
4 DG9612L-04 O-Ring 2 27 DG9612L-27 Ball Bearing 1
5 DG9612L-05 Throttle Pin 1 28 DG9612L-28 Bevel Gear Shaft 1
6 DG9612L-06 Spring 1 29 DG9612L-29 Bushing 1
7 DG9612L-07 Air Regulator 1 30 DG9612L-30 Housing Cap 1
8 DG9612L-08 O-Ring 1 31 DG9612L-31 Angle Housing 1
9 DG9612L-09 O-Ring 1 32 DG9612L-32 Gearse Fitting 1
10 DG9612L-10 Valve Plug 1 33 DG9612L-33 Button Bushing 1
11 DG9612L-11 Safety Throttle Lever 1 34 DG9612L-34 Shaft 1
12 DG9612L-12 Pin 1 35 DG9612L-35 Spring 1
DG9612L-13A Air Inlet (PT19) 1 36 DG9612L-36 Button 1
DG9612L-13B Air Inlet (NPT18) 1 37 DG9612L-37 Bearing 1
DG9612L-13C Air Inlet (PS19) 1 38 DG9612L-38 Bevel Gear 1
14 DG9612L-14 Exhaust Swivel 1 39 DG9612L-39 Double Round Key 1
15 DG9612L-15 Silencer 1 40 DG9612L-40 Ball Bearing 1
16 DG9612L-16 Ball Bearing 1 41 DG9612L-41 Chuck Spindle 1
17 DG9612L-17 Rear End Plate 1 42 DG9612L-42 Lock Ring 1
18 DG9612L-18 Roll Pin 1 DG9612L-43 1/4" Collet [ST-DG9612L] 1
19 DG9612L-19 Rotor 1 DG9616L-43 6mm Collet [ST-DG9616L] 1
20 DG9612L-20 Rotor Blade 4 44 DG9612L-44 Collet Nut 1
21 DG9612L-21 Spindle Collat 1 45 DG9612L-45 Spanner 2
22 DG9612L-22 Cylinder 1 46 DG9612L-46 Comfort Grip 1
23 DG9612L-23 Steel Ball 1
ST-DG9612(6)L-P-2206A-RE
43
13

DIE GRINDER
Original instructions
SUMAKE Industrial Co. Ltd.

1
Read all these safety instructions before operating this product and save these instructions.
The tool has been manufactured in conformity with the instruction of EU machine directive. The EU mark will be
considered void in the event of inexpert repairs, the use of non-original parts and in case of non-observance of the safety
instructions in the user’s manual.
Possible direct or indirect consequential damages are not the responsibility of SUMAKE Industrial co., Ltd.
General safety rules:
1. Watch the tool at all times when in use.
2. People under the influence of alcohol or drugs are not allowed to use, repair or maintain the tool.
3. Keep unqualified persons, children, etc. away from the tool.
4. Keep work area clean and with sufficient daylight or artificial lighting. The work area on which the machine is used must be cleaned up.
Disorder is a potential cause of accidents.
5. Danger of explosion. Never use oxygen and combustible gas as an air supply for the tool which many be ignited by spark and cause fire or
explosion.
6. Never use gasoline or other flammable liquids to clean the tool.
7. Do not use air tools in potentially explosive atmospheres such as in the presence of flammable liquids, cleaning solvents, fluid energy or
stored gases.
8. Do not expose air tools to rain. Do not use air tools in damp or wet locations.
9. When a fault or failure is detected, the tool must immediately be disconnected from the air supply and returned for repair.
10. It is not permitted to modify the tool in any way.
11. When not in use, keep tools in a dry place, either locked up or in a high place, out of the reach of children.
12. Do not force small air tools to do the job of a heavy –duty task. Do not use air tool for purpose of which was not intended.
13. Wear suitable ear protection at environment noise level >80dB(A) and safety spectacles when using the tool. Always wear approved safety
goggles if work in dusty. This also applies to other persons in the nearby vicinity.
14. Do not wear loose clothing or jewelry. They can be caught in moving parts. Rubber gloves and non-skid foot wear are recommended when
working outdoors. Wear protective hair covering to contain long hair.
15. Keep proper footing and balance at all times.
16. Use clamps or a vice to hold work-piece. It is safer than using your hand and free both hands to operate the air tool.
17. When not use, before performing service or changing accessories, please disconnect tool from air compressor.
18. Do not carry plugged in air tool with your finger on the switch trigger. Be sure switch is in the “OFF” position when connecting to air supply.
19. Watch what you are doing. Use common sense, even unsafe situation or unbalanced positions, particularly when you are tired.
20. Air powered tools can vibrate in use. Vibration, repetitive motions or uncomfortable positions may be harmful to your hands or arms. Stop
using any tool if discomfort, tingling feeling or pain occurs. Seek medical advice before resuming use.
21. Multiple hazards. Read and understand the safety instructions before installing, operating, repairing, maintaining, changing accessories on,
or working near the power tool. Failure to do so can result in serious bodily injury.
22. Only qualified and trained operators should install, adjust or use the die grinder.
23. Do not modify this die grinder. Modifications may reduce the effectiveness of safety measures and increase the risks to the operator.
24. Do not discard the safety instructions –give them to the operator.
25. Do not use the power tool if it has been damaged.
26. Tools shall be inspected periodically to verify the ratings and markings required by this document are legibly marked on the tool. The
employer/user shall contact the manufacturer to obtain replacement marking labels when necessary.
27. Only permitted insert tools of the correct shaft diameter are used.
28. Cutting-off wheels and routing cutter wheels shall not be used.
29. Allowed speed of the insert tool shall be higher than the speed of the die grinder.
30. Attention must be paid to the fact that allowed speed of the mounted point must be lowered due to the increase of the length of the shaft
between the end of the collet and the mounted point (overhang). Make sure that the minimum gripping length of 10 mm is observed.
31. Working in certain materials creates emission of dust and fumes, causing a potentially explosive environment.
32. There is risk of mismatching the diameter of the shaft of mounted point and that of the collet.
33. Excessive vibration levels may due to improper mounting or damaged insert tool.
34. Attention shall be paid so that maximum permissible pressure is not exceeded. Preferably a pressure regulator can be used to control the
pressure of the air being supplied to the die grinder.
35. There is a running on of the rotary inserted tool after the start and stop device has been released.
36. There is risk of drawing in of long hair, loose clothing.
37. There is risk that stored gas or fluid energy may cause.
38. There is risk of a whipping compressed air hose.
Safety precautions for projectile hazards
1. Failure of the work piece, or accessories, or even of the inserted tool itself may generate high velocity projectiles.
2. Always wear impact-resistant eye protection during operation of the tool. The grade of protection required should be assessed for each use.
3. Ensure that the work piece is securely fixed.
Safety precautions for entanglement hazards
1. Entanglement hazard –choking, scalping and/or lacerations can occur if loose clothing, personal jewellery, neck ware, hair or gloves are not
kept away from tool and accessories.
Safety precautions for operating hazards
1. Use of the tool may expose the operator’s hands to hazards including crushing, impacts, cuts and abrasions and heat. Wear suitable gloves

2
to protect hands.
2. Operators and maintenance personnel must be physically able to handle the bulk, weight and power of the tool.
3. Hold the tool correctly: be ready to counteract normal or sudden movements –have both hands available.
4. Maintain a balanced body position and secure footing.
5. Release the start and stop device in the case of an interruption of the energy supply.
6. Use only lubricants recommended by the manufacturer.
7. Personal protective safety glasses shall be used, suitable gloves and protective clothing are recommended
8. A rotary file shall not be operated at a speed exceeding the rated speed.
9. The maximum operating speed recommended by the rotary die grinder manufacturer shall equal or exceed the rated speed marked on the
tool.
Safety precautions for repetitive motions hazards
1. When using a power tool, the operator may experience discomfort in the hands, arms, shoulders, neck, or other parts of the body.
2. While using a die grinder, the operator should adopt a comfortable posture. Maintain secure footing and avoid awkward or off-balanced
postures. The operator should change the posture during extended tasks which may help avoid discomfort and fatigue.
3. If the operator experience symptoms such as persistent or recurring discomfort, pain, throbbing, aching, tingling, numbness, burning
sensation or stiffness, these warning signs should not be ignored. The operator should tell the employer and consult a qualified health
professional.
Safety precautions for accessory hazards
1. Disconnect the die grinder from energy supply before changing the inserted tool or accessory.
2. Only use sizes and types of accessories and consumables that are recommended by the die grinder manufacturer.
3. Avoid direct contact with the inserted tool during and after use as it can be hot or sharp.
Safety precautions for workplace hazards
1. Slips, trips and falls are major causes of workplace injury. Be aware of slippery surfaces caused by use of the tool and also of trip hazards
caused by the air line or hydraulic hose.
2. Proceed with care in unfamiliar surroundings. Hidden hazards may exist, such as electricity or other utility lines.
3. This die grinder is not intended for use in potentially explosive atmospheres and is not insulated from coming into contact with electric power.
4. Make sure there are no electrical cables, gas pipes etc. that could cause a hazard if damaged by use of the tool.
Safety precautions for dust and fume hazards
1. Dusts and fumes generated when using die grinders can cause ill health (for example: cancer, birth defects, asthma and/or dermatitis); risk
assessment of these hazards and implementation of appropriate controls of is essential.
2. Risk assessment should include dust created by the use of the tool and the potential for disturbing existing dust.
3. Operate and maintain the die grinder as recommended in these instructions, to minimise dust or fume emissions.
4. Direct the exhaust so as to minimise disturbance of dust in a dust filled environment
5. Where dusts or fumes are created, the priority shall be to control them at the point of emission.
6. All integral features or accessories for the collection, extraction or suppression of airborne dust or fumes should be correctly used and
maintained in accordance with the manufacturer’s instructions.
7. Select, maintain and replace the consumable/inserted tool as recommended in these instructions, to prevent an unnecessary increase in dust
or fumes.
8. Use respiratory protection as instructed by your employer or as required by occupational health and safety regulations.
Safety precautions for noise hazards
1. Unprotected exposure to high noise levels can cause permanent, disabling, hearing loss and other problems such as tinnitus (ringing, buzzing,
whistling or humming in the ears).
2. Risk assessment of these hazards and implementation of appropriate controls of is essential.
3. Appropriate controls to reduce the risk may include actions such as damping materials to prevent work pieces from ‘ringing’.
4. Use hearing protection as instructed by your employer or as required by occupational health and safety regulations.
5. Operate and maintain the power tool as recommended in these instructions, to prevent an unnecessary increase in noise.
6. If the tool has a silencer, always ensure it is in place and in good working order when the tool is operating.
7. Select, maintain and replace the consumable/inserted tool as recommended in these instructions, to prevent an unnecessary increase in
noise.
Safety precautions for vibration hazards
1. Exposure to vibration can cause disabling damage to the nerves and blood supply of the hands and arms.
2. Wear warm clothing when working in cold conditions and keep your hands warm and dry.
3. If you experience numbness, tingling, pain or whitening of the skin in your fingers or hands, stop using the assembly power tool for
non-threaded mechanical fasteners, tell your employer and consult a physician.
4. Operate and maintain the die grinder as recommended in these instructions, to prevent an unnecessary increase in vibration levels.
5. Select, maintain and replace the consumable/inserted tool as recommended in these instructions, to prevent an unnecessary increase in
vibration levels.
6. Support the weight of the tool in a stand, tensioner or balancer if possible.
7. Hold the tool with a light, but safe, grip because the risk from vibration is generally greater when the grip force is higher.
Additional safety instructions for pneumatic power tools
1. Air under pressure can cause severe injury.
2. Always shut off air supply, drain hose of air pressure and disconnect tool from air supply when not in use, before changing accessories or
when making repairs.

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3. Never direct air at yourself or anyone else.
4. Whipping hoses can cause severe injury. Always check for damaged or loose hoses and fittings.
5. Whenever universal twist couplings (claw couplings) are used, lock pins shall be installed and whipcheck safety cables shall be used to
safeguard against possible hose-to-tool and hose-and-hose connection failure.
6. Do not exceed the maximum air pressure stated on the tool.
7. Never carry an air tool by the hose.
Specific safety instructions
Warnings shall be given about any specific or unusual hazards associated with the use of the power tool. Such warnings shall indicate the nature
of the hazard, the risk of injury and the avoidance action to take.
General preparation and connection:
1. Before connecting the air hose, apply 4 to 5 drops of SAE#10-20 spindle oil at the air inlet. Also, every 3 to 4 hours of operation, oiling is
necessary. Twist Teflon thread tape to ensure a proper seal air inlet. Then tighten the air coupler into air tool.
2. The supplied compressed air must be clean and dry, with the appropriate oil mist. Use an air treatment unit; filter, regulator and lubricator.
3. Please refer Fig.1 illustration shows the correct mode of connection to the air supply system which will increase the efficiency and useful life
of the tool.
4. The quick connect coupling and hose must have sufficient air flow capacity. We recommend an air hose with a diameter of 10mm (3/8”).
5. To ensure a good performance. The operation pressure at the compressed air inlet should not exceed 6.3bar (90psi) (unless indicated
otherwise). Higher operating pressures may cause damaged or excessive wear. Operating pressures below 5.3bar may cause pressure or
power loss.
Risk of injury
1. Compressed air can inflict serious injuries. Therefore never point the air hose at another person or yourself.
2. Shut –off the air supply and disconnect the tool in case:
➢You want to change or replace accessories.
➢You want to clean, repair or maintain the tool.
➢The tool is not going to use for some times.
3. Check compressed air hose before use. If it is damaged, broken, torn, or deformed, the hose is not to be connected to the tool.
4. Always check the pneumatic couplings before using the tool. If they show signs of damage, fracture, cracking or excessive corrosion, the
respective tool or the air hose is not to be used.
5. Use only qualified adapters and connectors, In case of wear they are to be replaced immediately.
6. Only use air pipes that are fit for the use at maximum pressure.
Maintenance instruction:
1. Dry the filter (fig1) and the air inlet of the tool.
2. Lubricate the quick connect coupling to prevent blocking.
3. Air tool require lubrication throughout the life of the tool. The air motor and bearing uses compressed air to start the tool. The moisture in
compressed air will rust the air motor; you must lubricate the motor daily.
4. Avoid storing the tool in a location subject to high humidity. If the tool is left as it is used, the residual moisture inside the tool can cause rust.
5. Before storage, lubricate tool and run it for a few seconds.
6. Regular inspection of spindles, threads, and clamping devices in respect of wear and tolerances for location of abrasive products.
7. If the tool is too seriously damage to be used anymore, recycle raw material instead of disposing as waste. The machine, accessories and
packaging should be sorted for environmental-friendly recycling. Check with your local authority or retailer for recycling advice.
DIE GRINDER-I-201303A