GSC GS-29, Operation Manual

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X. SG-ES Drill Grinding
※
Verify the drill’s point angle and adjust the angle of the cutting lip grinding shelf ( I ) and
second face grinding shelf to the same before grinding procedure. (Angle adjustment
available is 118° - 140°)
Turn the power switch on and wait about 10 seconds until the motor rotation is stable.
※
Do not hold the drill shank while grinding, it may affect the grinding accuracy.
1. Cutting Lip Grinding (Fig. 10-1)
�
Insert the chuck set into the cutting lip
grinding shelf ( I ), align the slot of clamping-
nut to the two pins on the grinding shelf,
push the chuck set gently and turn it
clockwise and counterclockwise until
the grinding noise stops.
�
Take the chuck set out, turn it to the other
side and grind the drill in the same way.
2. Web Thinning (Fig. 10-2)
※
When inserting or taking out the chuck set,
the center part of the clamping nut slot should align to the pin on the grinding shelf.
�
Insert the chuck set into the left side web thinning grinding shelf, push the chuck set
gently and turn it clockwise and counterclockwise until the grinding noise stops.
②
Take the chuck set out, turn it to the other side and grind the drill in the same way.
Pin
No gap between
the chuck set and
the grinding shelf
Point Angle
Indicator
Fig. 10-1
No gap between
the chuck set and
the grinding shelf
Pin
Align the center of
the slot to the pin
Fig. 10-2
※
There are 0.1 mm shim and 0.3 mm shim for adjusting the size of web thickness.
(See chapter “ XII. The use of Metal Shims ”)
(continued on next page)
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