Long Series Twist Drill Bit 4.5 x 185mm

Helical point with split point Point angel - 130deg Helix angle - 40deg Tolerance - H8 Surface - bright / black Flute length - 125mm Ideally suitable for deep holes under difficult conditions. Suitable for all usual drilling work in all normal materials. High rotational precision For steel and cast steel alloyed and unalloyed up to 900N/mm strength, grey cast, malleable cast iron, die cast metal, iron sintor, nickel silver, graphite cast iron, short chipping aluminium alloys, bronze and brass