Countersinks have a conical cutting edge geometry. The most common types are 60°, 90° and 120°. They are used for countersinking, deburring and chamfering.
COUNTERSINKS DIN 335 C 12,4 HSS
DIN 335 = Countersinks with 3 cutting edges 90°
Form C = 3 cutting edges with cylindrical shank
12.4 mm = D1 = biggest diameter
HSS =High-speed steel
USAGE HSS COUNTERSINKS
Steel, cast steel alloyed and unalloyed up to 900 N/mm² tensile strength, grey cast iron, malleable cast iron, spheroidal graphite iron, die-casting, sintered iron, nickel silver, graphite, short chip-ping aluminium alloys, brass and bronze.
USAGE HSSE COUNTERSINKS
additionally usable for hot and cold work steels as well as stainless and acid-resistant steel (V2A / V4A)
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