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22 51091C/51090C QUESTION AND ANSWER: 1. Why does the machine no t operate after the switch is pressed? Check if the level of battery pack is too lo w Check if the battery pack is installed properly . 2. Why does the mac…

V_SC_5109NC_202104

the wheel smoothly.

Usually the edge of wheel shall be at an angle of

about 20 degrees to the surface of workpiece. When

the work is finished, separate the machine from the

workpiece and then release the switch.

NOTE

If the grinding lasts too long at one place on the

surface of workpiece, or if the angle between the

machine and workpiece is too large, the groove will

be ground on the surface of workpiece.

WARNING

During the operation, do not squeeze the wheel or

press the machine excessively. Otherwise the wheel

has the risk of rupture and may cause the injury;

Always use the accompanied guard, and do not use

the guard or be sure to carry the guard;

Never use the cut-off wheel for grinding.

7. Cutting operation (see Figure M)

NOTE

According to the material of workpiece, the wheel

of different material shall be selected, and the

recommended diameter is adopted. The maximum

rotating speed of wheel shall be more than 13000

rpm. The inner hole shall fit the pressure plate

tightly. Keep the working environment and workpiece

clean and tidy.

Place one hand on the outer casing, and the other on

the side handle, hold and start the tool, wait for the

tool to reach the maximum rotating speed, slowly

place the wheel on the workpiece, and exert a slight

force to improve the cutting efficiency.

Once the incision is formed, do not change the

cutting angle. Otherwise, the wheel will be easily

deformed and broken, causing a risk of injury.

When the work is finished, separate the machine

from the workpiece and then release the switch.

WARNING

Do not squeeze the wheel or apply an excessive

pressure. Avoid the deep cutting, which will increase

the load, make the wheel easy to twist or stick and

increase the possibility of rebound or damage to

the wheel. The wheel may break and the motor may

overheat.

Always use the accompanied guard, and do not use

the guard or be sure to carry the guard;

Never use the cut-off wheel for grinding.

Never initiate a cutting operation in the workpiece.

Please carefully insert the wheel into the surface of

cutting workpiece after it reaches the full speed. If

the electric tool starts in the workpiece, the wheel

may stick, move or rebound.

Do not change the angle of wheel during the cutting

operation. Applying a side pressure to the cut-

off wheel will cause the wheel to crack and break,

resulting in the serious personal injury.

8. Air filter net (Figure N)

To prevent the debris from entering the inside of

machine, a filter net is set at the air inlet. After the

machine is used or stored for a long time, please pull

it down and clean it.

9. Battery level indication

When the machine switch is pressed, the battery

indicator will stay on for 5s. The remaining capacity

of battery pack may be determined according to the

following table.

0-25%

25-50%

50-75%

75-100%

LED display Remaining battery

51091C/51090C

QUESTION AND ANSWER:

1. Why does the machine not operate after the

switch is pressed?

Check if the level of battery pack is too low

Check if the battery pack is installed properly.

2. Why does the machine stop when it is not

tightened?

The machine has low-voltage protection. When the

level of battery pack is too low, the machine will not

work. Please confirm the level of battery pack.

The machine has temperature protection. When

the battery is working at full load for a long time,

the battery pack will overheat and the temperature

protection system will start to stop the machine.

Cool the machine to normal temperature before

resumption.

The machine is equipped with overload protection.

When the load is excessive, the protection system will

start. Stop working.

WARNING

Please keep the wheel floating when the machine is

turned on and not touch the workpiece. Otherwise,

the wheel will be damaged and the machine will

rebound.

3. Why is the service life of same kind of battery

pack is different?

If a battery pack is left unused for a long time, its

service life may be shortened. This is the matter

of charging frequency. Repeated charging and

application may improve the situation. In case of

heavy work, the battery pack will run out soon. Do not

charge in a temperature below 0 °C or above 35 °C.

Otherwise, the performance of battery pack will be

affected.

MAINTENANCE

Be sure to pull off the plug before repairing or

replacing the machine.

The electric tool does not require additional

lubrication or other maintenance. Do not wash the

electric tool with the water or chemical cleaner. Wipe

it off with a dry cloth. Tool shall be stored under the

dry conditions and kept clean at the vent of motor. Try

not to use it in a dusty environment.

To prolong the service life of battery pack:

1) Store the battery pack below 26 °C after

charging it to 30%-50%.

2) Charge the battery pack fully once in less

than 6 months.

V_SC_5109NC_202104

To protect the natural environment, please

recycle or dispose of the battery pack

properly. The battery pack contains a Li-

ion battery. Please consult the local waste

disposal department for the information

on recycling and/or disposal. Exhaust the

battery pack with the hand drill, remove the

battery pack, and wrap the pole port with

strong tape to avoid the short circuit and

leakage. Do not attempt to open or remove

any part.

The damaged machine, accessories and

packaging materials shall be classified in

detail for recycling in line with environmental

protection requirements.

All plastic parts are marked with material

identifications to facilitate the classification

and recycling.

DISPOSAL OF DISCARDED BATTERY PACK

ENVIRONMENTAL PROTECTION