[90g hss m 5 dl]

[90g hss m 4 dl]

Short step drill bit 90° for through-holes, blank, format.

Design: very torsionally stable model, profile-ground, right-hand cutting, with precise tip grinding. Short design according to DIN 1897. Good centring properties thanks to the pointed out according to DIN 1412, Form A. Side rake angle, core thickness and core rise normal. Bore and countersink are manufactured in one step aligned with each other.
Diameter tolerance: d1 = h6.

Note: The cutting speed depends on the large diameter, the feed according to the small.

Design: countersunk angle 90°, fine.

Application: For screw through holes according to DIN EN 20273 and screw head countersinks 90°. Form A and B according to DIN 74, part 1. For screws according to DIN 963 and DIN 964. Especially suitable for use on CNC or NC machines.
Further information for thread: M6 drill diameter d1 x countersink diameter d2: 6.4 x 11.5 mm, total length l1: 95 mm, spiral length l2: 47 mm, drill step length l3: 15 mm, steels up to 850 N/mm²: 30 steels up to 1000 N/mm²: 16. Resistant steels (INOX): 8 cast iron materials: 30 Al, Al- and Mg-Leg. : 50 copper, brass, bronzes: 50