Drill Geometry - Optimum OPTIgrind GH 10T Betriebsanleitung

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Again slowly insert the clamping chuck in the opening in order to regrind the second side.
Img.4-8: Reducing the cross cutting edge
4.6

Drill geometry

The drilling with the spiral drill or hard metal drill is roughing with the front side of a
doubleedged tool therefore only little requirements in form accuracy and dimension of stability
of the drill and in the surface quality are available. It is possible to attain a higher surface quality
by subsequent rubbing.
Please find below the drill geometry of an ordinary spiral drill.
Body
Chip groove length
Thinning
Core thickness increase
Drill bar
Chip groove
EN
GH 10T | GH 15T
54
Overall length
Cylindrical shank
Angle of twist
Twist pitch
Originalbetriebsanleitung
Stop
Axis
Operation
Version 1.1.4 - 2022-09-23