Fein HSS dura core bits are used where working conditions are permanently adverse or where coolant cannot be used.
Made from high-quality high-speed steel with a cobalt content of 5 per cent, the surface is covered by a titanium aluminium nitrate coating.
Best glide properties, increased heat resistance and outstanding service life in steel, stainless steel and cast iron; HSS core bits are available from 12mm to 80mm diameter.
High concentricity within 100 μm delivers consistently smooth cuts and reduced chatter; impacts are absorbed by tough tips and body, complimented by a tooth hardness of 65 HRC; in-house vacuum heat treated for optimum balance of performance and extended life
Narrow cutting width of 5.1 mm for low torque and reduced energy consumption; HSS cutters have wide flutes to evacuate chips easily while less contact between the cutter and hole surface facilitates lower torque and power consumption
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