Version:
Cutting chisel edge with high centring accuracy due to strong core and special point geometry. High roundness and alignment accuracy of the deep hole, thanks to 4 guide chamfers. Outstanding chip evacuation due to 4 internal cooling channels from ⌀ 3.8 mm. Up to 3.7 mm ⌀ with 2 internal cooling channels. Straight major cutting edges with honed edges and special flute profile for short chips, even on long chipping materials.
Note:
Flute length L
C = L
2 + 1.5 × D
C.
For process reliability when using the 12×D drill, an initial centre drilling with NC spotting drills No.
121068–
121130 is necessary.
Form HB and HE are supplied at the same price as HA.
Order form
HB: with
No. 123214.
Order form
HE: with
No. 123212 + 129100HE.