Spiral step drill bit FORUM, HSS – TiN, Ø 4 – 12 mm

Universal spiral step drill bit FORUM.

Characteristics:

•  Coating TiN

•  HSS

•  Laser marking of the steps Ø

•  2 cutting edges

•  Spiral groove

•  Sliding in the chuck is prevented by the 3 – wall shank of the drill

•  Step length: 5 mm

•  Total length: 80 mm

•  GripØ h8: 6 mm

•  Steel < 850 N: recommended

•  Steel < 1000 N: recommended

•  Steel <1400 N: suitable to a limited extent

•  INOX: suitable to a limited extent

•  Aluminum, non-ferrous metals, non-ferrous alloy: recommended

•  Diameter of the drilling steps: 4, 5, 6, 7, 8, 9, 10, 11, 12 mm