Version:
Very sturdy − step length to DIN 8378. Tight concentricity tolerances between drill and counterbore ⌀ guarantee exact alignment.
Application:
Particularly suitable for NC machines and automatic machines. For drilling tapping holes to DIN 336 sheet 1 with 90° countersinking. In the following operation, the tap therefore does not have to cut into the sharp edge of the hole.
Sizes F: Tapping holes for the following fluteless taps.