Optimum OptiGrind GH 15T Operating Manual page 53

Img.4-4: Adjusting device

Set the desired drill bit angle. The standard drill bit angle on spiral drills amounts to 118° .
The point angle can be changed in order to create shape D.
Img.4-5: Setting the drill bit angle

Switch on the drill bit grinder.

Slowly insert the clamping chuck into the opening for regrinding.

By turning the clamping chuck one side of the spiral drill is reground.
ATTENTION!
Do not turn the collet chuck holder but only turn the clamping chuck otherwise the spiral
drill would get loose in the collet chuck.

Pull out the clamping chuck and turn the clamping chuck by a half turn ( 180°) in order to
grind the other side of the spiral drill.
Operation
Version 1.0.9 dated 2019-05-13
Abutting surfaces
Collet chuck holder
Clamping screw
Scale drill bit angle
Translation of the original instructions
OPTIMUM
M A S C H I N E N - G E R M A N Y
GH 10T | GH 15T
®
GB
Page 53