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.
For process reliability when using the 12×D deep-hole drill, an initial centre drilling with No. 121068 ?" 121130 or 3×D pilot drilling operation with No. 122736 is necessary.
Pilot drill required: yes, pilot drill
Standard: Manufacturer's standard
Tolerance nominal ?: h7
Number of cutting edges Z: 2
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 96 mm
Overall length L: 146 mm
Shank ? Ds: 8 mm
Feed f in steel < 1100 N/mm2: 0.15 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.
For process reliability when using the 12×D deep-hole drill, an initial centre drilling with No. 121068 ?" 121130 or 3×D pilot drilling operation with No. 122736 is necessary.
Pilot drill required: yes, pilot drill
Standard: Manufacturer's standard
Tolerance nominal ?: h7
Number of cutting edges Z: 2
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 96 mm
Overall length L: 146 mm
Shank ? Ds: 8 mm
Feed f in steel < 1100 N/mm2: 0.15 mm/rev.
