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21
1 7.1
CARBIDE DRILLS
Use diamond wheel! (option)
Change of the grinding wheel, see page 29.
Grinding of carbide drills depending on shape of cutting edge use the 4 facet shape or
twist drills. The sharpening of stone drills with 4 facet shape is same as describted on
page 1 9.
The sharpening of stone drills with standard twist drill shape is same as described for
right hand drills (see page 1 5).
Alighn main cutting edge
straight to line
Align main cutting edge
between both graduation
marks
4 facet shape
Twist drill shape