HSS-R (roll milled)
- Spiral drill bit made of high-grade high-speed steel according to DIN 338, roll-milled, cylindrical, right-hand cutting, type N
- Cone-shaped shell polished surface 118°, diameter tolerance h8
- Black surface
- Suited for drilling work in steel, NF metals, cast steel, alloyed and non-alloyed. Up to 900 N/mm² tensile strength.