ST = Shock-protected design
suitable for quick-action drill chuck 214500 + 215000 with taper B18
- Wall thickness up to 1200 mm = 1
- made from powder metallurgical HSS (PS55)
- with internal coolant supply (max
Spiralbohrer PREMUS, HSS Typ N 156961 ST = Shock-protected designVersion 102000 and 102050: made of HSS Cone surface grinding Gouging from 14,25 mm steam treated Use 102000 and 102050: Standard twist drill for general machining in alloyed, unalloyed steel, cast steel, gray cast iron, malleable cast iron, ductile cast iron, sintered iron, nickel silver, and graphite. Version 102350: made from HSS Co Cone surface grinding Gouging from 10,00 mm steam treated Use 102350: Alloyed, unalloyed steels and cast types over