4.Fitting and adjusting the wheel guard

The wheel guard is a protective device to prevent injury should the depressed center wheel be shattered during operation. Ensure that the wheel guard is properly fitted and fastened before

commencing grinding operation.

[How to attach and adjust the wheel guard] (Fig. 1)

￿Set the wheel ass’y to the packing gland.

￿Tighten M5 screw to secure the wheel guard while the lever is in closed position.

￿Perform the adjustment of the wheel guard while the lever is released. (Loosen M5 screw and readjust if the wheel guard does not rotate smoothly.)

￿After adjustment, if grinder operation is required, perform the operation only after setting the lever in closed position.

￿Lubricate the sliding section of the set piece (B) and the lever if the lever does not move smoothly.

Lever

Set piece (B)

M5 screw

Fig. 1

5.Ensure that mounted wheels and points are fitted in accordance with the manufacturer’s instructions. Ensure that the depressed center wheel to be utilized is the correct type and free of cracks or surface defects. Also ensure that the depressed center wheel is properly mounted and the wheel nut is securely tightened. Refer to the section on “ASSEMBLING AND DISASSEMBLING ACCESSORIES”.

Ensure that blotters are used when they are provided with the bonded abrasive product and when they are required.

Do not use separate reducing bushings or adaptors to adapt large hole abrasive wheels.

For tools intended to be fitted with threaded hole wheel, ensure that the thread in the wheel is long enough to accept the spindle length.

Do not use cutting off wheel for side grinding.

6.Conducting a trial run

Ensure that the abrasive products is correctly mounted and tightened before use and run the tool at no-load for 30 seconds in a safe position, stop immediately if there is considerable vibration or if other defects are detected.

If this condition occurs, check the machine to determine the cause.

7.Confirm the push button.

Confirm that the push button is disengaged by pushing push button two or three times before switching the power tool on (See Fig. 1).

5

8.Fixing the side handle.

Screw the side handle into the gear cover.

9.Adjusting the number of revolution (EXCEPT OF G13YF)

Above models are equipped with an electronic infinite-variable-speed drive and can change the number of revolution according to a use.

If you turn and set the dial scale (Fig. 2) to 6, the number of revolution increases, and if you turn and set it to 1, the number of revolution decreases. Before use, set the number of revolution using the dial. In so doing, refer to the following table as a rough guide.

Dial

Use

Tools

1

Polishing, finishing

Radial grinding disc

2

Removal of paint or

Sanding disc

coat

 

 

 

3

Removal of rust

 

4

Removal of burrs

 

5

Grinding

Depressed center

 

wheel

 

 

 

Rough grinding

Depressed center

6

Cutting

wheel

 

 

Diamond wheel

NOTE: Use caution not to turn the dial scale to any value below 1 or above 6.

Dial

Fig. 2

10.Caution when using near welding equipment When using the grinder in the immediate vicinity of welding equipment, the rotational speed may become unstable. Do not use the grinder near welding equipment.

11.RCD

The use of a residual current device with a rated residual current of 30 mA or less at all times is recommended.

PRACTICAL GRINDER APPLICATION

1.Pressure

Do not apply the grinding wheel strongly to the grinding surface. The grinder makes use of electronic circuit, so during application of load rotates at high speed, so ample grinding effect can be obtained by applying light pressure. If a strong grinding pressure or other abnormal load is applied, the overload protection circuit will operate and make the grinder stop rotating, so please stop applying load immediately. Following this, switching the power OFF and then ON again, will cause the rotation to increase to the regular speed.