Sumake ST-7110DC(S)-5 User manual

SUMAKE PNEUMATIC TOOLS
Central Vacuum Gear-Driven Sander
W/5” Velcro (Stick) Pad
ST-7110DC(S)-5
SUMAKE INDUSTRIAL CO., LTD
4F,NO.351,Yangguang St.,Neihu District TAIPEI, TAIWAN, ZIP:114-91
Specification:
Free Speed
900 r/min
Orbit Diameter
5 mm
Sanding Pad
5”(127 mm)
Air Consumption
15 CFM (430 L/min)
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
3.1 lbs (1.4 kg)
Noise and Vibration:
Vibration
EN ISO 28927-3
Noise
EN ISO 15744
Remark
No Load:
2.6 m/s²
Sound Pressure Level
No load: 88 dB(A)
Please always
wear ear
protector at
environment
noise level > 80
dB(A) due to
risk of impaired
hearing!
Sound power level
No load: 99 dB(A)
Uncertainty
K= 1.5 m/s²
Uncertainty
K= 3dB
ST-7110NC(S)-5-S-1410H-STF

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：CENTRAL VACUUM GEAR-DRIVEN SANDER
W/5" VELCRO (STICK) PAD
Model/ Serial No.：ST-7110DC(S)-5
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 11148-8:2011
Name and Signature/Position Date and Place
2013/6/28
Mike Su –Managing Director Taipei, Taiwan
ST-7110DC(S)-5-D-1308E-STF

Application:
It is useful for various sanding work, to smooth wood and automotive or wood finishes by abrasion with sandpaper. (Sander)
Pad mounting dangers:
Correct sanding pad mounting is necessary to prevent injury from loosen wheels.
Do not use chipped or cracked sanding pad.
Use only wheels fitting the machine easily. If you need more force than usual to screw on the thread lead from the pad could be differ from the unit.
Before sanding, test wheel by briefly running tool at full throttle. Be sure to use a barrier (such as under a heavy working table) to stop any possible loosen wheel parts.
Abroken sanding wheel will cause serious hurts !
Regularly check the speed of the device by a tachometer to make sure the speed has not been exceeded and is conform with the sanding wheels you use. The
approvable speed is mentioned down on the sanding wheel or on the data sheet which comes with them.
Never use a sanding wheel marked with a speed lower than this tool!
Do not wear jeweled or loose clothing and avoid long hair.
Choking can happen if neckwear is not kept away from tool and accessories!
Avoid direct contact with accessories during and after use. Safety gloves will reduce the risk of cuts or burns.
Use only proper accessories retainers (refer to parts list).
Use only sanding wheels with the correct shaft diameter, dimension and approvable speed according to the technical data of this tool.
This unit has been developed as orbital sander and must only used for this function. Any misuse could occur serious health damage.
Dangers in use:
Do not lay down the device before all the rotary parts stopped
Do not keep the air tool running while carrying it.
Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces.Always use auxiliary handle, if provided, for maximum
control over kickback or torque reaction during start-up. The operator can control torque reactions or kickback forces, if proper precautions are taken
Never place your hand near the rotating accessory.Accessory may kickback over your hand.
Switch off the unit immediately in case of blocking or twist. Disconnect the air supply and do not switch on again until the problem is solved. Understand the reason why
the tool has been blocked and make sure that this situation will not occur once more by counteract.
Make sure that the accessory you intend to use has no damage. Exchange the
part if you are not sure.
In case the air tool gives a strong vibration, replace the accessory / abrading
medium, probably it’s damaged or worn out..
Remember that a broken sanding wheel will cause serious hurts.


Common Troubleshooting:
Event Appearance Possible Cause Solution
Blades broken or worn out Replace blades
Ball bearing damaged Replace ball bearing
Air is coming from the exhaust valve Rusty motor or clogged with objects Disassemble and repair
Regulator is set at OFF Adjust regulator
No air flow Check air system and connections
Not operating
No air coming from the exhaust valve Valve set damaged or broken Disassemble and repair
Not enough air pressure Check air pressure
Low revolution rate Forwarder/reverse valve is not set properly Adjust forwarder/reverse valve
Low efficiency Motor running abnormal or unusual noises
occur Not enough lubrication, ball bearing, upper/lower end plate, cylinder, rotor, blade damaged Lubricate or replace parts
Trigger does not bounce back or does not
bounce back correctly Trigger set has other objects stuck on it or the spring is broken, deformed or rusty Disassemble and repair
Motor keeps
running Trigger function normally Trigger O-ring worn out or valve set damaged or broken Disassemble, repair and replace parts
ST-7110-I-1403C-ST

PARTS LIST
No. Parts No. Description Q'ty No. Parts No. Description Q'ty
01 7110-01 Housing 1 33 7110-33 Faceplate 1
02 7110-02 Cone Muffler 1 34 7110-34 Dustproof Washer 1
03 7110-03 Muffler Body 1 35 7110-35 Gear 1
04 7110-04 Screw 1 36 7110-36 Screw (M3X10) 4
4-1 7110-04-1 Screw [ST-7110NC(S)] 1 37 7110-37 Gear Link 1
05 7110-05 O-Ring (3.5X1.4) 1 38 7110-38 Washer 1
06 7110-06 Valve Stem 1 39 7110-39 Dustproof Washer 1
07 7110-07 Bushing 1 40 7110-40 Gear Seat 1
08 7110-08 Washer 1 41 7110-41 Screw 4
09 7110-09 Valve 1 42 7110-42 Bushing 1
10 7110-10 Spring 1 43 7110-43A 5" Balancer 1
11 7110-11 Packing 1 44 7110-44 Pin (2X10) 1
12 7110-12 Housing Back Seat [ST-7110DC(S), VC(S)] 145 7110-45 Screw 1
12-1 7110-12-1 Housing Back Seat [ST-7110NC(S)] 1 46 7110-46 Exhaust Sleeve [ST-7110NC(S)] 1
13 7110-13 O-Ring 2 47 7110-47 Shround [ST-7110NC(S)] 1
14 7110-14 Regulator 1 7110-49A 5" Non Vac Vinyl Face Pad 1
15 7110-15 Snap Ring 1 7110-49B 5" Non Vac Hook Face Pad 1
16 7110-16 Lever 1 7110-49E 5" 6-Hole Vacuum Velcro Pad 1
17A 7110-17A Pin (3X24L) 1 7110-49F 5" 6-Hole Vacuum Stick Pad 1
18 7110-18 Air Inlet 1 50 7110-50 Screw 6
20 7110-20 Snap Ring 1 51 7110-51 Handle 1
21 7110-21 Bearing (6000ZZ) 3 52A 7110-52A Pin (3X8) 1
22 7110-22 Rear Plate 1 52B 7110-52B Pin (3X12L) 1
23A 7110-23A Rotor Blade 8 53 7110-53 Screw + Washer 2
24A 7110-24A Rotor 1 54 7110-54 Rubber Hose & Bag [ST-7110VC(S)] 1
25 7110-25 Cylinder 1 55 7110-55 Hex (3mm) 1
26 7110-26 O-Ring 1 56 7110-56 O-Ring (S9) 1
27 7110-27 Front Plate 1 57 7110-57 Shround [ST-7110DC(S), VC(S)] 1
28 7110-28 Bearing (6002ZZ) 1 60 7110-60 Washer 1
29 7110-29 Rotor Key 1 61 7110-61 Washer 1
30 7110-30 Motor Shaft Balancer 1 62 7110-62 Washer 1
31 7110-31 Housing Cover 1 63 7110-63 Silencer [ST-7110NC(S)] 2
32 7110-32 Screw 4 64 7110-64 Stainless Mesh [ST-7110NC(S)] 2
ST-7110-5-P-0911E-ST
49
ST-7110NC(S)-5
ST-7110DC(S)-5
ST-7110VC(S)-5
CENTRAL VACUUM GEAR-DRIVEN SANDER W/5" VELCRO (STICK) PAD
SELF-GENERATED VACUUM GEAR-DRIVEN SANDER W/5" VELCRO (STICK) PAD
NON-VACUUM GEAR-DRIVEN SANDER W/5" VELCRO (STICK) PAD

SANDER
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. For multiple hazards, read and understand the safety instructions before installing, operating, repairing, maintaining, changing accessories on,
or working near the sander. Failure to do so can result in serious bodily injury.
22. Only qualified and trained operators should install, adjust or use the sander.
23. Do not modify this sander. Modifications can 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 a sander if the tool has been damaged.
26. Tools shall be inspected periodically to verify that the ratings and markings required by this part of 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. Be aware that failure of the workpiece or accessories, or even of the inserted tool itself can generate high-velocity projectiles.
2. Always wear impact-resistant eye protection during operation of the sander. The grade of protection required should be assessed for each
use.
3. For overhead work, wear a safety helmet.
4. The risks to others should also be assessed at this time.
5. Ensure that the workpiece is securely fixed.
Safety precautions for entanglement hazards
1. Choking, scalping and/or lacerations can occur if loose clothing, personal jewellery, neck wear, hair or gloves are not kept away from the tool
and accessories.
Safety precautions for operating hazards
1. Use of the tool can expose the operator's hands to hazards, including 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. Personal protective safety glasses shall be used; suitable gloves and protective clothing are recommended.
8. Inspect the backing pad before each use. Do not use if cracked or broken or if it has been dropped.
9. Avoid direct contact with the moving sanding pad in order to prevent pinching or cutting of hands or other body parts. Wear suitable gloves to
protect hands.
10. Never run the tool unless abrasive is applied to the workpiece.
11. There is a risk of electrostatic discharge if used on plastic and other non-conductive materials.
12. Potentially explosive atmospheres can be caused by dust and fumes resulting from sanding.

2
13. Always use dust extraction or suppression systems which are suitable for the material being processed.
Safety precautions for repetitive motions hazards
1. When using a sander to perform work-related activities, the operator can experience discomfort in the hands, arms, shoulders, neck or other
parts of the body.
2. While using a sander, the operator should adopt a comfortable posture whilst maintaining secure footing and avoiding awkward or off-balance
postures. The operator should change posture during extended tasks; this can help avoid discomfort and fatigue.
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 sander from the energy supply before fitting or changing the inserted tool or accessory.
2. Avoid direct contact with the inserted tool during and after use, as it can be hot or sharp.
3. Use only sizes and types of accessories and consumables that are recommended by the manufacturer of sanders; do not use other types or
sizes of accessories or consumables.
4. Grinding wheels and cutting-off tools shall not be used.
5. Check that the maximum operating speed of the inserted tool (flap wheels, abrasive belts, fibre discs, backing pads, etc.), is higher than the
rated speed of the sander.
6. Self-fixing sander discs shall be placed concentrically on the supporting pad.
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. The sander is not intended for use in potentially explosive atmospheres and is not insulated against contact with electric power.
3. Ensure that there are no electrical cables, gas pipes, etc., which 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 sanders 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. Operate and maintain the sander as recommended in these instructions, to minimize dust or fume emissions.
4. Direct the exhaust so as to minimize disturbance of dust in a dust-filled environment.
5. Where dust 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 the instruction handbook, to prevent an unnecessary increase in
dust or fumes.
8. Use respiratory protection in accordance with employer's instructions and as required by occupational health and safety regulations.
Safety precautions for noise hazards
1. 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). Therefore, risk assessment and implementation of appropriate controls for these hazards are essential.
2. Appropriate controls to reduce the risk can include actions such as damping materials to prevent workpieces from “ringing”.
3. Use hearing protection in accordance with employer's instructions and as required by occupational health and safety regulations.
4. Operate and maintain the sander as recommended in the instruction handbook, to prevent an unnecessary increase in the noise level.
5. Select, maintain and replace the consumable/inserted tool as recommended in the instruction handbook, to prevent an unnecessary increase in
noise.
6. If the sander has a silencer, always ensure it is in place and in good working order when the tool is being operated.
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 sander, tell your employer and
consult a physician.
4. Operate and maintain the sander as recommended in the instruction handbook, to prevent an unnecessary increase in vibration levels.
5. 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.

3
Specific safety instructions
Warnings shall be given about any specific or unusual hazards associated with the use of the sander. Such warnings shall indicate the nature of the
hazard, the risk of injury and the avoidance action to be taken.
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.
SANDER-I-201309A