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Twist drill bit kwb COBALT HSS CO 1 piece right hand rotation
kwb COBALT HSS CO twist drill bit, right hand rotation, made from 5% cobalt-alloyed high-speed steel, precision ground and finished in a bronze colour. The drill has a 135° tip angle and is cross-ground to DIN 1412 C for self‑centering cylindrical performance, supplied as a single piece in blister packaging for professional and industrial use.
The cobalt-alloyed HSS construction provides increased heat resistance and longer life when drilling hard and abrasive materials. Precision grinding and cross-ground geometry ensure accurate centring and smooth cutting. The 135° tip angle reduces walking on the surface and improves performance in stainless and alloyed steels while the bronze finish offers corrosion resistance and easy identification.
Secure the drill bit in the tool’s chuck ensuring a firm, concentric fit. Use appropriate cutting speed and feed for the material being drilled and apply cutting fluid when working with stainless or alloyed steels to reduce heat and extend tool life. Start drilling at low speed to establish the centre, then increase speed as appropriate for the diameter and material. Clear chips frequently to avoid clogging and overheating.
For best results with A2/A4 stainless steels and other hard materials, use slower cutting speeds, steady feed, and suitable coolant; replace the bit when wear affects centring or cutting performance.
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