Polski 
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Description
Center drill protected designed to perform 60/120 st. nutation in a single procedure
Technical data of the protected nut Fi 3,15 mm
- working diameter D - 3.15 mm
- diameter D1 - 6.7 mm,
- shank diameter d - 11.2 mm,
- length l - 3.9 mm,
- total length L - 60 mm
Center drill protected fi 3,15 mm
Center drill inner fi 3,15 mm HSS NWRd for professional production of protected nuts, according to DIN 333-B. It is suitable for pre-drilling notches with a recess angle of 60 degrees and a diameter of 1 mm. It has two central blades with an angle of 118 degrees and special chip grooves for quick removal of the cut allowance from the workpiece. Protected caps are useful for pre-guidance of the drill bit, as well as when it is necessary to drill on sloping surfaces.
The drill bits offered in our store are made entirely by grinding method from special high-grade HSS - High Speed Steel. Thanks to it, the drill bits are very resistant to heavy cutting conditions, they allow machining of materials of class P1.2 - P1.3 (unalloyed steels, sheets, metals, non-ferrous metals, aluminum alloys, copper alloys, thermally hardened plastics. Blades center drillów are resistant to mechanical damage, such as fractures, cracks, chipping, chipping and others.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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