Puur 6.20x150x215 mm HSS EXTRA-PIKK Serie 1 DIN1869RN ZV3001 STIMZET

Extra long straight shank drills, series 1, 2, 3

For deep-hole drilling by means of jig bushes of parts made of unalloyed or alloyed steel, cast steel up to 900 N/mm2, grey-, malleable- or nodular cast iron sintered steel etc.

It is necessary to prevent form flute-stopping by frequent withdrawing the drill.

It is necessary to reduce the recommended cutting conditions regarding to the insufficient supply of the cutting fluid.

λ=25°÷30° ε=118°