Version:
Drilling and reaming in a single operation. Cutting chisel edge with high centring accuracy due to strong core and special point geometry. Particularly high alignment accuracy due to 4 guide chamfers.
Advantage:
Very tight manufacturing tolerances with H7 fit can be produced without additional reaming.
Note:
Form HB and HE supplied at the same price as HA.
Form
HB: order with
No. 122790 + 129100HB .
Form
HE: order with
No. 122790 + 129100HE.
Flute length L
C = L
2 + 1.5 × D
C.
Solid carbide precision fit drills for machining aluminium available on request.