Screwing tool e.g. ring spanner, has drive body with torque introduction zone, and two drifting bodies with drifting profile, where material hardness of drifting bodies is greater than material hardness of drive body

摘要

The tool has a drive body (1) made of a material except stainless steel and with a torque introduction zone. Two drifting bodies (2, 3) e.g. multi-sided thrust piece, have a screw aggression profile (4), and is made of a stainless material such as stainless metal, high-grade steel e.g. martensitic stainless steel, ceramic, or sinter material. The drifting bodies have a material hardness, of about 55-58 Rockwell C-scale hardness, that is greater than the material hardness of about 56 Rockwell C-scale hardness of the drive body.