Long Series Twist Drill Bit 8.5 x 165mm HSS Ground
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Total length - 165mm
Flute length - 109mm
Point cut - helical point
Point angle - 188deg
Helix angle - 20-30deg
For steel and cast steel alloyed and unalloyed up to approx 900Nmmm strength, grey cast, malleable cast iron, die cast metal, iron sinter, nickel-silver, graphite cast iron, short-chipping aluminium alloys, bronze & brass