SUMAKE PNEUMATIC TOOLS
1/2" Air Impact Wrench
(Single Hammer)
ST-4521A
Specification:
Free Speed
Capacity Bolt Size
Noise and Vibration:
8,500 r/min
Vibration
Noise
EN ISO 28927-2
EN ISO 15744
Remark
M12
Max Torque
200 ft-lb (270 N-m)
Air Consumption
9 CFM (254 L/min)
Overall Length
6-1/10” (155 mm)
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
2.9 lbs (1.3 kg)
Sound Pressure Level
load: 88 dB(A)
Load:
1.5 m/s²
Sound power level
load: 99 dB(A)
Uncertainty
K= 1.35 m/s²
Uncertainty
K= 3dB
Please always
wear ear
protector at
environment
noise level > 80
dB(A) due to
risk of impaired
hearing!
SUMAKE INDUSTRIAL CO., LTD
4F,NO.351,Yangguang St.,Neihu District TAIPEI, TAIWAN, ZIP:114-91
ST-4521A-S-1411A-OP
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： 1/2" AIR IMPACT WRENCH (SINGLE HAMMER)
Model/ Serial No.：ST-4521A
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 11148-6:2012
Name and Signature/Position
Date and Place
2013/6/28
Mike Su – Managing Director
Taipei, Taiwan
ST-4521A-D-1411A-OPF
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.
compressor and the tool. Use a 3 HP or larger
compressor for each sander.
C ou p l er
L ea d e r
h os e
R e c o il
h os e
W ater
A ir
s e p a ra ti o n s u p p l y
Tool
N i pp l e
Oi l e r
R eg ul a to r
D ra i n
d ai l y
Features
This tool with a reversible spindle driving a
hammer which periodically strikes an anvil which
includes a drive adapter for the purpose of
tightening or loosening nuts and bolts without
producing any major torque reaction on the
power tool.
Operator’s instruction
1.
Main Applications
The most popular 1/2” drive impact wrench. It
combines compact size and light weight with
high torque to meet a wide range of applications.
It is ideal for overall automotive service, body
shop, farm, and light truck work.
2.
2-3 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.
Drainag
e
Cautions for Use
2-1 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)
5
7
2-2 Air line
Use a 3/4“ 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. 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 on oiler between the
2-4 Inserted tools
Use only the socket or adapter which are in good
condition for use. The intended socket and
adapter for this air tool could are stated as “
Square Drive＂ on the specification list.
2-5 The approved eye protector, ear-muff,
mouth-muffle, and gloves shall be worn when
operate this tool.
2-6 The working place shall be ventilative.
2-7 Release the on-off device in the case of
energy supply failure.
3.
Operation Method
3.1 On-off device
The on-off device is on the inner or outer contour
of the grip. It is a “hold-to-run＂ type. This tool
stops rotation within few sec, after releasing the
lever. For the sake of safety, place it on a level
plate or on hanger after it completely stops.
3.2 Torque Adjuster
You can adjust the torque by rotating the knob
which indicated by 1 to 6. “1＂ indicates the
smallest torque output and “6＂ indicts the
largest torque output.
3.3 Rotating Direction
One shall make sure the direction of rotation
before actuate this tool. The “F＂ indicts
foreword and the “R“ indicts reverse. Forward
is defined as clockwise direction seen from the
operator｀s position.
Warning
4.
Maintenance
4-1 Lubrication
Before connecting the hose , apply 4 or 5 drops
of #10 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,
wash it away immediately. Also, every 3 or 4
hours of operation, oiling is necessary.
4-2 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.
4-3 Disposal
If the tool is too seriously damaged to be used
anymore, drop it in a resource recycling can.
Never drop it into fire.
4-4 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.
1. The power toll shall not be used in potentially
explosive atmospheres.
2. Disconnect the air hose before changing or
adjusting any inserted tools.
3. Prevent long hair or loose clothing from
drawing in while operate this tool.
4. Keep your body in well balanced position and
always wear gloves to reduce the risk of crushing
caused by torque between handle and workpiece.
5. Unexpected direction of rotating could cause a
hazardous situation.
6. Slip/Trip/Fall is a major reason of serious
injury or death. Beware of excess hose left on the
walking or work surface.
7. Wearing eye/face protector could reduce the
danger to person from high speed splinters being
emitted from this tool in the case of inserted tool
failure or emitted from the workpiece.
8. Wearing mouth-muff could avoid inhaling dust
or handling debris from work process that can be
harmful to your health.
9. Excessive high air pressure and too much free
rotation may speed the wear of this tool and
might cause danger situation.
* In ordering parts and components, give each
part number, name and quantity.
ST-4521A-I-1411A-OP
ST-4521
ST-4521A
PARTS LIST
No.
Parts No.
1
4521-01
2A
4521-02A
3
4521-03
4521-04
4
4521-04
4521-05
5
4521-05A
6
4521-06
7
4521-07
8
4521-08
9
4521-09
10
4521-10
11
4521-11
12
4521-12
13
4521-13
14
4521-14
15
4521-15
16
4521-16
17
4521-17
4521 17
19
4521-19
21
4521-21
22
4521-22
3/8" AIR IMPACT WRENCH (SINGLE HAMMER)
1/2" AIR IMPACT WRENCH (SINGLE HAMMER)
Description
Q'ty
Front Cap
1
Bushing
1
Retaining Ring [ST-4521]
1
O-Ring (P4) [ST-4521]
2
O-Ring (P4) [ST-4521A]
1
3/8" Dr. Anvil [Incl. 3, 4] [ST-4521]
1
1/2" Dr. Anvil [Incl. 58, 60] [ST-4521A]
1
Pin (Φ4.75x29)
2
Ring
1
Hammer Case
1
Bolt
1
Ball Bearing (R6)
2
Oil Seal
1
Front Plate
1
Steel Ball (Φ4mm)
1
Rotor
1
Rotor Blade
7
Pin (Φ2x6)
2
Cylinder
C li d
1
Rear Plate
1
Hook
1
Handle
1
No.
23
24
25
27
28A
29
31A
32
35A
36
37
38
49
51
56
57
58
59
60
61
Parts No.
4521-23
4521-24
4521-25
4521-27
4521-28A
4521-29
4521-31A
4521-32
4521-35A
4521-36
4521-37A
4521-37B
4521-38
4521-49
4521-51
4521-56
4521-57
4521-58
4521-59
4521 59
4521-60
4521-61
Description
Screw
Pin (Φ2x14)
Switch Lever
Screw
Reverse Valve
Spring
Speed Switch
O-Ring (S16)
Valve Rod
Muffler
Air Inlet (NPT18)
Air Inlet (PT19)
Pin (Φ3x24)
Bushing
O-Ring (P11.2)
Steel Ball (Φ3.175mm)
Spring
O-Ring (P7) [ST-4521A]
Adj t
Adjuster
Bushing [ST-4521A]
Reverse Valve
Q'ty
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
ST-4521(A)-P-1810C-OP
IMPACT WRENCH
Original instructions
SUMAKE Industrial Co. Ltd.
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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Watch the tool at all times when in use.
People under the influence of alcohol or drugs are not allowed to use, repair or maintain the tool.
Keep unqualified persons, children, etc. away from the tool.
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.
Danger of explosion. Never use oxygen and combustible gas as an air supply for the tool which may be ignited by spark and cause fire
or explosion.
Never use gasoline or other flammable liquids to clean the tool.
Do not use air tools in potentially explosive atmospheres such as in the presence of flammable liquids, cleaning solvents, fluid energy or
stored gases.
Do not expose air tools to rain. Do not use air tools in damp or wet locations.
When a fault or failure is detected, the tool must immediately be disconnected from the air supply and returned for repair.
When not in use, keep tools in a dry place, either locked up or in a high place, out of the reach of children.
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.
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.
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.
Keep proper footing and balance at all times.
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.
When not use, before performing service or changing accessories, please disconnect tool from air compressor.
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.
Watch what you are doing. Use common sense, even unsafe situation or unbalanced positions, particularly when you are tired.
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.
For multiple hazards, read and understand the safety instructions before installing, operating, repairing, maintaining, changing
accessories on, or working near the assembly power tool for threaded fasteners. Failure to do so can result in serious bodily injury.
Only qualified and trained operators should install, adjust or use the assembly power tool for threaded fasteners.
Do not modify this assembly power tool for threaded fasteners. Modifications can reduce the effectiveness of safety measures and
increase the risks to the operator.
Do not discard the safety instructions; give them to the operator.
Tools shall be inspected periodically to verify that the ratings and markings required by this part of EN ISO 11148 are legibly marked on
the tool. The employer/user shall contact the manufacturer to obtain replacement marking labels when necessary.
Safety precautions for projectile hazards
1. Failure of the workpiece, of accessories or even of the inserted tool itself can generate high-velocity projectiles.
2. Always wear impact-resistant eye protection during the operation of the assembly power tool for threaded fasteners. The grade of
protection required should be assessed for each use.
3. Ensure that the workpiece is securely fixed.
Safety precautions for entanglement hazards
1. Entanglement hazards can result in choking, scalping and/or lacerations if loose clothing, personal jewellery, neckware, hair or gloves are
not kept away from the tool and accessories.
2. Gloves can become entangled with the rotating drive, causing severed or broken fingers.
3. Rotating drive sockets and drive extensions can easily entangle rubber-coated or metal-reinforced gloves.
4. Do not wear loose-fitting gloves or gloves with cut or frayed fingers.
5. Never hold the drive, socket or drive extension.
6. Keep hands away from rotating drives.
Safety precautions for operating hazards
1. The use of the tool can expose the operator's hands to hazards including crushing, impacts, cuts and abrasions and heat. Wear suitable
gloves to protect hands.
2. Operators and maintenance personnel shall 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 and 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. Do not use in confined spaces and beware of crushing hands between tool and workpiece, especially when unscrewing.
Safety precautions for repetitive motions hazards
1. When using a power tool, the operator can experience discomfort in the hands, arms, shoulders, neck, or other parts of the body.
2. While using an assembly power tool for threaded fasteners, the operator should adopt a comfortable posture whilst maintaining secure
footing and avoiding awkward or off-balanced postures. The operator should change posture during extended tasks, which can help avoid
discomfort and fatigue.
1
3. If the operator experiences symptoms such as persistent or recurring discomfort, pain, throbbing, aching, tingling, numbness, burning
sensations 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 assembly power tool for threaded fasteners from the energy supply before changing the inserted tool or accessory.
2. Do not touch sockets or accessories during impacting, as this increases the risk of cuts, burns or vibration injuries.
3. Use only sizes and types of accessories and consumables that are recommended by the assembly power tool for threaded fasteners
manufacturer.
4. Use only impact-wrench-rated sockets in good condition, as poor condition or hand sockets and accessories used with impact wrenches
can shatter and become a projectile.
Safety precautions for workplace hazards
1. Slips, trips and falls are major causes of workplace injury. Be aware of slippery surfaces caused by the 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, such as electricity or other utility lines, can exist.
3. The assembly power tool for threaded fasteners is not intended for use in potentially explosive atmospheres and is not insulated against
coming into contact with electric power.
4. Make sure there are no electrical cables, gas pipes, etc., that can cause a hazard if damaged by use of the tool.
Safety precautions for dust and fume hazards
1. Dust and fumes generated when using assembly power tools for threaded fasteners can cause ill health (for example, cancer, birth
defects, asthma and/or dermatitis); risk assessment and implementation of appropriate controls for these hazards are essential.
2. Risk assessment should include dust created by the use of the tool and the potential for disturbing existing dust.
3. Direct the exhaust so as to minimize disturbance of dust in a dust-filled environment.
4. Where dust or fumes are created, the priority shall be to control them at the point of emission.
5. 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.
6. Use respiratory protection in accordance with employer's instructions and 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 and implementation of appropriate controls for these hazards are essential.
3. Appropriate controls to reduce the risk may include actions such as damping materials to prevent workpieces from “ringing”.
4. Use hearing protection in accordance with employer's instructions and as required by occupational health and safety regulations.
5. Operate and maintain the assembly power tool for threaded fasteners as recommended in the instruction handbook, to prevent an
unnecessary increase in noise levels.
6. If the assembly power tool for threaded fasteners has a silencer, always ensure it is in place and in good working order when the
assembly power tool for threaded fasteners is operating.
7. Select, maintain and replace the consumable/inserted tool as recommended in the instruction handbook, to prevent an unnecessary
increase in noise.
Safety precautions for vibration hazards
1.
2.
3.
4.
Exposure to vibration can cause disabling damage to the nerves and blood supply of the hands and arms.
Keep the hands away from the sockets.
Wear warm clothing when working in cold conditions and keep your hands warm and dry.
If you experience numbness, tingling, pain or whitening of the skin in your fingers or hands, stop using the assembly power tool for
threaded fasteners, tell your employer and consult a physician.
5. Operate and maintain the assembly power tool for threaded fasteners as recommended in the instruction handbook, to prevent an
unnecessary increase in vibration levels.
6. Do not use worn or ill-fitting sockets or extensions, as this is likely to cause a substantial increase in vibration.
7. Select, maintain and replace the consumable/inserted tool as recommended in the instruction handbook, to prevent an unnecessary
increase in vibration levels.
8. Sleeve fittings should be used where practicable.
9. Support the weight of the tool in a stand, tensioner or balancer, if possible.
10. Hold the tool with a light but safe grip, taking account of the required hand reaction forces, because the risk from vibration is generally
greater when the grip force is higher.
Additional safety instructions for pneumatic power tools
1. 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.
2. Never direct air at yourself or anyone else.
3. Whipping hoses can cause severe injury. Always check for damaged or loose hoses and fittings.
4. Cold air shall be directed away from the hands.
5. Do not use quick-disconnect couplings at tool inlet for impact and air-hydraulic impulse wrenches. Use hardened steel (or material with
comparable shock resistance) threaded hose fittings.
6. 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.
7. Do not exceed the maximum air pressure stated on the tool.
8. For torque-control and continuous-rotation tools, the air pressure has a safety critical effect on performance. Therefore, requirements for
length and diameter of the hose shall be specified.
9. Never carry an air tool by the hose.
2
General preparation and connection:
1.
2.
3.
4.
5.
6.
7.
When using brand-new air hose or air pipe. Blow and clean the inside of air hose or pipe before installation.
Keep inside of air hose or air pipe clean to prevent airdrop problem caused by the lots of drain and dust accumulated and possibly make
the inside diameter smaller in the long use.
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.
The supplied compressed air must be clean and dry, with the appropriate oil mist. Use an air treatment unit; filter, regulator and
lubricator.
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.
The quick connect coupling and hose must have sufficient air flow capacity. We recommend an air hose with a diameter of 10mm (3/8”).
To ensure a good performance. The operation pressure at the compressed air inlet should not exceed 6.2bar (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.
2.
3.
4.
5.
6.
Compressed air can inflict serious injuries. Therefore never point the air hose at another person or yourself.
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.
Check compressed air hose before use. If it is damaged, broken, torn, or deformed, the hose is not to be connected to the tool.
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.
Use only qualified adapters and connectors, In case of wear they are to be replaced immediately.
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.
3
IMPACT WRENCH-I-2013-04A
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