4109 - Long series DIN 340 twist drills TiAlN coated for deep holes
Threading depth: up to 8xD
Material: HSS Co5 (5% cobalt)
Usage: for uninterrupted deep drilling - heat resistant steels, stainless steels, cast iron, titanium
Sharpening: helical thinning
Norm: DIN 340
Range: 1 mm - 13 mm
HSS Co5 twist drills with helical thinning special point shape and parabolic flutes for uninterrupted machining of deep holes, particularly on heat resistant steels, stainless steels and cast iron.