RUKO 101051H Step drill bit 4 - 20 mm HSS Total length 81 mm 1 pc(s)

Step drill bit HSS, spiral-grooved with cross-grinding

Size No. 1. Drilling range 4.0 - 20.0 mm.NEXT GENERATION - With this robust tool, sheets can be centered, drilled, drilled and deburred in one operation.The deep-ground and spiral-shaped clamping groove offers absolute smoothness and high cutting performance. In particular, chips that do not break are cleanly transported away as with a twist drill. This reduces the formation of surface-mounted cutting edges and cold welding on the cutting edges. The cone makes it easier to pull back on pierced sheets. HSS: High-performance high-speed working steel for drilling in well-machined materials with a strength of up to 900 N/mm².

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