Sumake ST-77481 User manual

1
INSTRUCTION MANUAL
ITEM NO.: ST-77481
WET AIR CUTTING SAW
ST-77481-I-1012A-GI

2
Important Safety Instruction
Read all instructions before using this tool.All operators must be fully trained in its use and aware of safety rules.
1. Maintenance
● Oil 3cc lubricant (SAE #10 or equivalence) through air inlet before connecting the product to the air. Run the tool 15
seconds to allow air circulating the oil and well lubricate the cylinder. This will ensure top performance and maximize
durability of tool.
● Oil 3cc lubricant through air inlet after use and run the tool 5 seconds before storage.
● Clear & dry air allows the product perform at its best and extends the product life.AFilter/ Regulator/Lubricator set is
highly recommended.
● If the tool is in unusual condition, shut it off and disconnect its air hose immediately. Put a warning sign on the product
until it gets repaired.
● Product repairing needs professional training and tool. Do not attempt to disassemble the product or it might be
damaged.
2. User
● The user must be well trained and physically able to operate the product and aware of safety regulation.
● Use personal safety equipment suchas goggle, earmuffs, mask & apron.
● Maintain a balanced body position and secure distance. Do not wear jewelry or loose clothing. Helmet is required if you
wear long hair.
3. CompressedAir
● Do not operate the product with excessair pressure; standard air pressure is 90 psi (6.2 bar or 6.3kg/cm2).
● Always shut off air supply, drain hose of air pressure and disconnect product from air supply before changing
accessories, making repairs or when the tool is not in use.
● Never direct air or product at yourself or anyone else.
● Whipping hose can be extremely dangerous and causes serious injury.Always check for damaged or loose hoses and
fittings.
4. Product
● Do not adapt the product for other purpose;it might harm the product and the user.
● Do not adapt or remove the switch, level or any other component of the product; it might result in malfunctioning and
harm the user.
● Do not use quick connect coupling on the product directly; use it only on the hose end.
● The product is not insulator; keep away from electricity.
5. Accessories
● Please use proper accessories, improper or unqualified accessories may damage the product, deteriorate performance
and do harm to user.
● When replacing the accessories, use the tool attached with the product. Improper tool or incorrect ways of handling the
tool (such as strike) may damage it.
6. Workplace
● Slip, trip & fall are major causes of serious injury ordeath; be aware of excess hose left on the walking or working
surface.
● Workpiece must be fixed firmly; always keep no miscellaneous objects that could interfere with the operation.

3
1
3
8
4
Top View 6
5
7
6
2
CONTROLS & CONNECTIONS
BEFORE OPERATION
Check the followings first:
1. Make sure the workplace is suitable to perform cutting work.
2. Verify if the capacity of air compressor could provide sufficient airflow rate for the tool.
3. Drain the water in compressor tank; fill the lubricator with oil (SAE#10 or equivalence) and make sure no rust or
problem found in the compressor.
4. Check and adjust the operating pressure of compressed air; the best work pressure is 90 psi (6.2 bar or 6.3kg/cm2);
excess air pressure may result in over-speed hazard.
No Description
1 Fix Screw
2 Trigger
3 Trigger Lock
4 Air Inlet
5 Adjust Screw
6 Butterfly Screw
7 Water Valve Knob
8 Water Inlet

4
Preparing Connections:
1. Workplace for operating cutting saw must comply with related safety & health regulation.
2. Connect tool to the air hose, water hose and air exhausting hose as the following steps:
(1) Connect water hose to water inlet: dip the hose end (about 3 cm long) in 95-100oC hot water for 10 seconds to soften
the hose end; this could facilitate the hose to be easier connected to the water inlet. Be careful not to scald by the hot
water.
(2) Make sure the air hose have been properly connected to air inlet of tool.
3. Connect air hose to air inlet:
(1) Remove any dust or particle found in the air hose and adapters to prevent from feeding particlesinto the tool and result
in possible damage.
(2) Verify if the adapters are firmly secured on the hose; connect the hose between air compressor and tool.
GETTING START
Prepare the First Cutting:
WARNNING
● To prevent from any possible injury to the user or damage the workpiece, always keep the cutting blade
away from workpiece before opening the trigger.
● Make sure the operators keep in a safety distance from the cutting blade before feeding the air to the
tool.
WARNNING
● Always disconnect the air hose adapter before changing the cutting blade, repairing the tool or when the
tool is not in use.
● Use personal safety equipment such as goggle, earmuffs, mask & apron in work.
● Choose proper cutting blade for different material of the workpiece.
● Never use a cutting blade marked with a speed lower than rating speed of tool
● Never use a broken or damaged cutting blade.
● If the tool drops by accident, check and verify carefully to make sure the tool works normally before
proceeding your work
WARNING Make sure the following procedures have been complied with respective
instruction before operation

5
6
Top View 6
5
97
96
95
100 99
Base
Blade
43
43 Blade
A aerial view for base
A. Install Cutting Blade
1. Stop the nut (95) with main shaft wrench (99)
2. UseAllen wrench (100) to loosen fix screw (97) clockwise, then remove spring washer (96) and nut (95).
3. Take the cutting blade away from the arbor and install a new blade.
4. Put back nut (95), spring washer (96) and fasten fix screw (97) counter-clockwise.
5. After installation, turning blade by hand to ensure blade and (36th) Water Exit have been installed properly and
matching.
B. Adjust Cutting Depth
1. Loose the butterfly nut (6) to set the blade to the required cutting depth and fasten the butterfly nut
2. UseAllen wrench (100) to set the adjust screw (5) positioned on bottom plate to prevent butterfly nut (6) from loosing
during long period of operation
C. Feed Water
Connect water hose to water inlet (8) and adjust the water valve knob (7) to feed water to the cutting blade.
8
7

6
1
3
8
4
2
D. Feed Compressed Air
1. Check and verify if the fix screw (1) is tightly fastened.
2. Connect air hose to air inlet (4)
PRECAUTION
Prior to cutting, trial run the tool with free load for few seconds to visually check if cutting blade is fixed
properly and the tool is running smoothly. Stop the tool immediately if any abnormal sound or vibration is
found. Re-check the installation of cutting blade or consult with distributor for further assistance.
3. Press trigger (2) to check if the tool start running; keep your hand away from the cutting blade to prevent from injury.
4. To run tool continuously, first hold trigger (2) and trigger lock (3), second release trigger; then the tool can now work
continuously; it eases finger off the long pressing fatigue.
5. Press trigger (2) to release trigger lock (3) when you need to return normal operation.

SUMAKE PNEUMATIC TOOLS
4" Wet Air Cutting Saw
ST-77481
SUMAKE INDUSTRIAL CO., LTD
4F,NO.351,Yangguang St.,Neihu District TAIPEI, TAIWAN, ZIP:114-91
Specification:
Free Speed 7,000 r/min
Disc Size 4” (100 mm)
Length 13” (330 mm)
Air Consumption 22 CFM (623 L/min)
Air Inlet (PT) 1/4” (6.35 mm)
Air Hose (I.D.) 1/4” (6.35 mm)
Air Pressure 90 psi (6.3 bar)
Net Weight 6.42 lbs (2.92 kg)
Noise and Vibration:
Vibration
EN ISO 28927-4 Noise
EN ISO 15744 Remark
Sound Pressure Level
No load: 85 dB(A)
No Load:
< 2.5 m/s²Sound power level
No load: 96 dB(A)
Uncertainty
K= 1.5 m/s²Uncertainty
K= 3dB
Please always
wear ear
protector at
environment
noise level > 80
dB(A) due to
risk of impaired
hearing!
ST-77481-S-1503B-GIF

ECDECLARATION 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：4" WET AIR CUTTING SAW
Model/ Serial No.：ST-77481
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 11148-7:2012
Name and Signature/Position Date and Place
2013/6/28
MikeSu–ManagingDirector Taipei, Taiwan
ST-77481-D-1503B-GIF

ST-77481
4" WET AIR CUTTING SAW (WITHOUT SAW BLADE)
ST-77481-P-1012A-GI

ST-77481
4" WET AIR CUTTING SAW (WITHOUT SAW BLADE)
PARTS LIST
No. Parts No. Descri
p
tion Q't
y
No. Parts No. Descri
p
tion Q't
y
1 77481-01 Bod
y
1 55 77481-55 Tri
gg
er 1
2 77481-02 Front Plate 1 57 77481-57 Pin 1
3 77481-03 Ball Bearin
g
2 58 77481-58 Pin 1
4 77481-04 Ball Bearin
g
1 59 77481-59 O-Rin
g
1
5 77481-05 Rotor 1 60 77481-60 S
p
rin
g
1
6 77481-06 C
y
linder 1 61 77481-61
A
ir Inlet Screw 1
7 77481-07 S
p
rin
g
Pin 1 62 77481-62 Water Valve Seat 1
8 77481-08 Blade 4 63 77481-63 Bushin
g
2
9 77481-09 Rear Plate 1 64 77481-64 Ball Valve 1
10 77481-10 Pinion Gear 1 65 77481-65 Co
pp
er Bushin
g
1
11 77481-11 Rubber Ca
p
1 66 77481-66 S
p
rin
g
1
12 77481-12 O-Rin
g
1 67 77481-67 Water Valve Joint 1
13 77481-13 Lock Rin
g
1 68 77481-68 Shaft 1
14 77481-14 S
p
acer 1 69 77481-69 Screw 1
15 77481-15 Main Shaft 1 70 77481-70 S
p
rin
g
Pin 1
16 77481-16 Bearin
g
1 71 77481-71 Water Valve 1
17 77481-17 Ke
y
1 72 77481-72 Screw 1
18 77481-18 Bevel Gear 1 73 77481-73
A
llen Screw 3
19 77481-19 Wave Washer 1 74 77481-74 Joint Washer 2~3
20 77481-20 Retainin
g
Rin
g
1 75 77481-75 Quick Joint
,
L-t
yp
e1
21 77481-21 Ball Bearin
g
1 76 77481-76 Screw 4
22 77481-22 Ke
y
1 77 77481-77
A
n
g
le Settin
g
Rin
g
1
23 77481-23 S
p
iral Gear 1 78 77481-78 Fix Plate 1
24 77481-24 Retainin
g
Rin
g
1 79 77481-79 Cou
p
lin
g
Nut 1
25 77481-25 Gear Box 1 80 77481-80
A
llen Screw 3
26 77481-26
A
llen Screw 6 81 77481-81 Quick Joint 1
27 77481-27 S
p
rin
g
1 82 77481-82 Exhaust Cover 1
28 77481-28 Flat Washer 1 83 77481-83 Self Ta
pp
in
g
Screw 2
29 77481-29
A
llen Screw 1 84 77481-84 Screw 1
30 77481-30 Gear Shaft 1 85 77481-85 Ca
p
1
31 77481-31 Ball Bearin
g
1 86 77481-86 Joint Piece 1
32 77481-32 Oil Seal 1 87 77481-87 Base 1
33 77481-33 Gear Seat 1 87a 77481-87a Base 1
34 77481-34 Wave Washer 1 87-1 77481-87-1 Su
pp
ort Frame 1
35 77481-35 Retainin
g
Rin
g
1 87-2 77481-87-2
A
n
g
le Index 1
36 77481-36 Ke
y
1 87-3 77481-87-3 Screw 5
37 77481-37 S
p
acer 1 87-4 77481-87-4 Nut 5
38 77481-38 S
p
iral Gear 1 88 77481-88
A
llen Screw 1
39 77481-39 Retainin
g
Rin
g
1 89 77481-89 Nut 1
40 77481-40 Ball Bearin
g
1 90 77481-90 Flat Washer 1
41 77481-41 Gasket 1 91 77481-91 Butterfl
y
Nut 1
42-1 77481-42-1 Disc Guard 1 92 77481-92 Water Pi
p
e1
42-2 77481-42-2 Shroud 1 93 77481-93
A
ir Inlet Pi
p
e1
43 77481-43 Water Exit 1 77481-94A Disc Receiver
(
20mm
)
1
44 77481-44 Water Exit Nut 1 77481-94B Disc Receiver
(
22mm
)
1
45 77481-45 Quick Joint
,
L-t
yp
e 2 95 77481-95 Disc Nut 1
46 77481-46
A
llen Screw 3 96 77481-96 S
p
rin
g
Washer 1
47 77481-47
A
llen Screw 2 97 77481-97
A
llen Screw 1
48 77481-48 Handle 1 98 77481-98
A
ir Joint 1
49 77481-49 S
p
rin
g
Pin 1 99 77481-99 Bushin
g
1
50 77481-50 S
p
rin
g
1 100 77481-100 Sto
pp
er 1
51 77481-51 Push Button 1 101 77481-101 Grease Hole 1
52 77481-52 Fix Nut 1 102 77481-102 Sto
p
S
p
anner 1
53 77481-53 Tri
gg
er Lock 1 103 77481-103
A
llen Wrench 1
54 77481-54 S
p
rin
g
Pin 2 ST-77481-P-1012A-GI
94

CUTTER(SAW)
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 tool.
22. Failure to do so can result in serious bodily injury.
23. Only qualified and trained operators should install, adjust or use the tool.
24. Do not modify the tool. Modifications may reduce the effectiveness of safety measures and increase the risks to the operator.
25. Do not discard the safety instructions –Give them to the operator.
26. Warnings shall be given against the risk of explosion or fire due to the material being processed;
27. Do not use the tool if it has been damaged
28. 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.
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 the 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 cuts and abrasions and heat. Wear suitable gloves 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. Warnings against the break-through when the tool bit passes through the material being cut
6. Release the start and stop device in the case of an interruption of the energy supply
7. Use only lubricants recommended by the manufacturer
8. Personal protective safety glasses shall be used, suitable gloves and protective clothing are recommended.
Safety precautions for repetitive motions hazards
1. When using the tool to perform work-related activities, the operator may experience discomfort in the hands, arms, shoulders, neck, or

2
other parts of the body.
2. While using the tool, 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 may help avoid discomfort and fatigue.
3. If the operator experiences symptoms such as persistent or recurring discomfort, pain, throbbing, aching, tingling, numbness, burning
sensation, or stiffness, these warnings should not be ignored. The operator should tell the employer and consult a qualified health
professional.
Safety precautions for accessory hazards
1. Disconnect the tool from the energy supply before fitting or changing the inserted tool or accessory.
2. Only use sizes and types of accessories and consumables that are recommended by the tool 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. The tool 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 the tool 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 tool 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 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 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 workpieces from ‘ringing’
4. Use hearing protection as instructed by your employer and as required by occupational health and safety regulations;
5. Operate and maintain the circular, oscillating or reciprocating saw as recommended in these instructions, to prevent an unnecessary
increase in noise levels
6. Select, maintain and replace the consumable/inserted tool as recommended in these instructions, to prevent an unnecessary increase in
noise
7. If the tool has a silencer, always ensure it is in place and in good working order when the tool is operating;
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 circular, oscillating or
reciprocating saw, tell your employer and consult a physician.
4. Operate and maintain the tool 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 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. 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.
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 tool. Such warnings shall indicate the nature of

3
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.
CUTTER(SAW)-I-201304A