Dormer Spiralbohrer A5203.9 HSS DIN 1897 Nenn-Ø 3,9 mm TiN

High Speed Steel (HSS) provides good hot hardness when drilling 130 degree special point provides self centering, low thrust and easier penetration Convex cutting edges and flute design aid swarf breakage and removal TiN Coating increases surface hardness, wear resistance and improves tool life Special geometry allows higher cutting data and reduced cycle times