Version:
Cutting chisel edge with high centring accuracy due to strong core and special point geometry.
Particularly high alignment accuracy due to 4 guide chamfers which stabilise the drill even at extreme depths!
Straight major cutting edges with honed edges and special flute profile for short chips, even on long chipping materials.
Advantage:
High process reliability and surface quality of the hole.
Note:
Flute length L
C = L
2 + 1.5 × D
C.
Form HB and HE supplied at the same price as HA.
Form
HB: order with
No. 123115.
Form
HE: order with
No. 123110 + 129100 HE.