M. step drill D8378 HSS M3 90D

Multi-chamfer subland drill, 90° for core 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 8378, 90° countersink angle.

Application: For thread core holes according to DIN 336, part 1 and 90° free countersinking corresponding with the through holes according to DIN EN 20273.

With Morse taper shank DIN 8379 or VHM design available on request.