Description
Version:
3-flute drill, specially developed for use at very high feed rates. Outstandingly suitable for machines with high installed power and stable operating conditions.
The sector-leading technology of the chisel edge guarantees optimum self-centring behaviour and permits spot drilling on irregular surfaces. 3 guide chamfers guarantee a stable exit from the hole and an exact roundness of the hole.
Note:
Flute length LC = L2 + 1.5 × DC.
Form HB and HE supplied at the same price as HA.
Form HB: order with No. 122726.
Form HE: order with No. 122725 + 129100HE.
Standard: DIN 6537 L
Tolerance nominal ?: h7
Number of cutting edges Z: 3
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 58 mm
Overall length L: 124 mm
Shank ? Ds: 14 mm
Feed f in steel < 1100 N/mm2: 0.56 mm/rev.
3-flute drill, specially developed for use at very high feed rates. Outstandingly suitable for machines with high installed power and stable operating conditions.
- Special cutter geometry with stable cutting edges and large clearance at the centre enables very high feed rates.
- The patented tip is optimised for chip flow and generates low cutting pressure with good chip breakage.
- With 145° tip angle for low burr formation when drilling through holes.
The sector-leading technology of the chisel edge guarantees optimum self-centring behaviour and permits spot drilling on irregular surfaces. 3 guide chamfers guarantee a stable exit from the hole and an exact roundness of the hole.
Note:
Flute length LC = L2 + 1.5 × DC.
Form HB and HE supplied at the same price as HA.
Form HB: order with No. 122726.
Form HE: order with No. 122725 + 129100HE.
Standard: DIN 6537 L
Tolerance nominal ?: h7
Number of cutting edges Z: 3
Tolerance nominal ?: h7
recommended maximum drilling depth L2: 58 mm
Overall length L: 124 mm
Shank ? Ds: 14 mm
Feed f in steel < 1100 N/mm2: 0.56 mm/rev.
