Description
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 LC = L2 + 1.5 × DC.
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.
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.
Through-coolant: yes, with 25 bar
Standard: Manufacturer's standard
Tolerance nominal ?: h7
Number of cutting edges Z: 2
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 70.8 mm
Overall length L: 116 mm
Shank ? Ds: 6 mm
Feed f in steel < 1100 N/mm2: 0.1 mm/rev.
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 LC = L2 + 1.5 × DC.
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.
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.
Through-coolant: yes, with 25 bar
Standard: Manufacturer's standard
Tolerance nominal ?: h7
Number of cutting edges Z: 2
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 70.8 mm
Overall length L: 116 mm
Shank ? Ds: 6 mm
Feed f in steel < 1100 N/mm2: 0.1 mm/rev.
