Stepped drill bit

Ruko guard rail stepped drill bit HSS TiAlN

RUKO HSS plain without tip

With straight shank for the production of core holes according to DIN 336 part 1, while simultaneously producing free countersinks (90°) according to through holes in line with ISO 273. The cutting speed depends on the large diameter, the feed on the small diameter.

With straight shank for the production of through holes according to ISO 273, while simultaneously producing countersinks (90°) in shape A. The cutting speed depends on the large diameter, the feed on the small diameter.

For the production of through holes according to ISO 273, while simultaneously producing countersinks (180˚) in form H, J, K, H3, J3 and K3 according to DIN 74 part 2. The cutting speed depends on the large diameter, the feed on the small diameter.

With straight shank for the production of through holes according to ISO 273, while simultaneously producing countersinks (90°) in shape A and B according to DIN 74 part 1. The cutting speed depends on the large diameter, the feed on the small diameter.