Sumake ST-7710 User manual

SUMAKE PNEUMATIC TOOLS
Air Belt Sander (20x520mm)
ST-7710
SUMAKE INDUSTRIAL CO., LTD
4F,NO.351,Yangguang St.,Neihu District TAIPEI, TAIWAN, ZIP:114-91
Specification:
Free Speed
16,000 r/min
Sanding Pad
7/8 x 20”
(20 x 520 mm)
Air Consumption
17 CFM (480 L/min)
Overall Length
13-1/3” (340 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
2.6 lbs (1.2 kg)
Noise and Vibration:
Vibration
EN ISO 28927-3
Noise
EN ISO 15744
Remark
No Load:
4.38 m/s²
Sound Pressure Level
load: 87.8 dB(A)
Please always
wear ear
protector at
environment
noise level > 80
dB(A) due to
risk of impaired
hearing!
Sound power level
load: 98.8 dB(A)
Uncertainty
K= 1.5 m/s²
Uncertainty
K= 3dB
ST-7710-S-2309E-PZF

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：AIR BELT SANDER (20x520mm)
Model/ Serial No.：ST-7710
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
2022/9/14
Mike Su –Managing Director Taipei, Taiwan
ST-7710-D-2309E-PZF

Application:
It is useful for various sanding work, to smooth wood and automotive or wood finishes by abrasion with sandpaper.
Belt-Sander applications: To grind plain surfaces
Safety instructions for belt-sanders
Belt mounting dangers:
Correct belt mounting is necessary to prevent injury from loosen belts.
Do not use chipped or cracked sanding belts
Use only belts fitting the machine easily. If you need more force than usual to install the belt the size could be differ from the requirement.
Before sanding, test belt 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 belts.
Acracked sanding belt 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 abrasive belts you use. The
approvable speed is mentioned down on the data sheet which comes with the belts.
Never use a belt 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 belts with the correct diameter, dimension and approvable speed according to the technical data of this tool.
This unit has been developed as belt 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 cracked sanding belt will cause serious hurts.
Common Troubleshooting:
Event Appearance Possible Cause
Solution
Not operating
A
ir is coming from the exhaust valve Blades broken or worn out Replace blades
Ball bearing damaged Replace ball bearing
Rusty motor or clogged with objects Disassemble and repair
No air coming from the exhaust valve Regulator is set at OFF
A
djust regulator
No air flow Check air system and connections
Valve set damaged or broken Disassemble and repair
Low efficiency
Low revolution rate Not enough air pressure
Check air pressure
Forwarder/reverse valve is not set properly
A
djust forwarder/reverse valve
Motor running abnormal or unusual noises
occur Not enough lubrication, ball bearing, upper/lower end plate, cylinder, rotor, blade damaged Lubricate or replace parts
Motor keeps
running
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
Trigger function normally Trigger O-ring worn out or valve set damaged or
broken Disassemble, repair and replace parts
ST-7710-I-1904C-PZ

ST-7710 AIR BELT SANDER
PARTS LIST
No. Parts No. Description Q'ty No. Parts No. Description Q'ty
1N 7710-01N Idle Pulley Bracket Sub Assy 1 24 7710-24 Ball Bearing 626ZZ 1
2 7710-02-1 Idle Pulley Set (2N,2E,43) 1 25 7710-25 End Plate A 1
2N 7710-02N Idle Pulley 1 26 7710-26 Cylinder 1
2E 7710-02E Ball Bearing 686zz 2 26A 7710-26A Pin (3x6) 1
3 7710-03 Spring 1 27 7710-27 Blade Assy 5
5 7710-05 Hexagon Socket Head Bolt (M5x8) 128 7710-28 Rotor 1
5A 7710-05A Cup Spring (M5) 1 29 7710-29 Throttle Lever 1
6 7710-06 Hexagon Socket Head Bolt (5x12) 130 7710-30 Lever Pin (φ3x23) 1
7 7710-07 Grinding Belt (#100) 1 31 7710-31 Valve Body 1
7A 7710-07A Grinding Belt (# 80) 1 32 7710-32 O-Ring (P9) 1
8 7710-08 Hexagon Socket Head Bolt (6x16) 133 7710-33 O-Ring (P9) 1
8A 7710-08A Washer 1 34 7710-34 O-Ring (P5) 1
9 7710-09 Drive Pulley 1 35 7710-35 Valve Stem 1
10 7710-10 Flat Shoe 1 36 7710-36 O-Ring (3.6x2.4) 1
11 7710-11 Hexagon Socket Head Bolt (5x15) 137A 7710-37A Valve Spring 1
12 7710-12 Dust Cover 1 38 7710-38 Deflector 1
13 7710-13 Guard Body 1 7710-39B Air Inlet (NPT18) 1
14 7710-14 Tension Bar 1 7710-39C Air Inlet (PS19) 1
15 7710-15 Spring 1 40 7710-40 Hexagon Wrench Key 4 1
16 7710-16 Lever Pin (φ2 x 6 ) 141 7710-41 Screw 1
17 7710-17
Lever Pin (φ2 x 8 ) 141A 7710-41A C-Cliper 1
18 7710-18 Housing 1 42 7710-42 Idle Pulley Screw 1
19 7710-19 Ball Bearing (R6zz) 1 43 7710-43 Washer 1
20 7710-20 End Plate B 1 44 7710-44 Screw 1
21 7710-21 Spacer 10x13x3 1 45 7710-45 Spring Washer (AW6) 1
22 7710-22 Sunk Key 2x2.5x10 1 46 7710-46 Finger Pad Assy 1
23 7710-23 Cap 1
ST-7710-P-2110D-PZ
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