Version:
Strong core and special point geometry −ensure the cutting chisel edges maintain high self-centring accuracy.
Straight cutting edges with slight edge hone and a special flute profile produce short chips.
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 or HOLEX Pro Steel No.
122501 is necessary.
Form HB and HE supplied at the same price as HA.
Form
HB: order with
No. 123307.
Form
HE: order with
No. 123308.
NEW GENERATION AVAILABLE!
Recommended successor product is No. 123303.