M. step drill D8374 HSS M3 90D

90° multi-chamfer subland drill for through holes

Design: Profile grinding, right cutting, with precision ground point. Normal angle of rake, core thickness and core gradient. Drilling and countersinking are produced in a single step, aligned to each other.
Ø Tolerance: d1 = h9
d2 = h8

Note: The cutting speed is orientated towards the large diameter, the feed towards the small diameter.

Design: DIN 8374, 90° countersink angle, fine.

Application: For screw through holes according to DIN EN 20273 and 90° screw head countersinking. Form A and B according to DIN 74, part 1. For screws according to DIN 963 and DIN 964.

With morse taper shank DIN 8375 available on request.