Twist drill made of high-speed steel (M35) with hardness 66°HRc (+/-1°) and with point angle 135°,
cut with thinning, which gives self-centering features without necessity of punching or spot drilling.
Spiral dextrorotatory drill, spiral type N, fully ground edges, with high flexibility and torsional strength,
highly protected from fractures. Diameter tolerance h8.
Cylindrical shank matching drill's diameter.
The drill enables 40% quicker progress of drilling and 50% smaller feed force of cutting.
Structure of cutting material reinforced by 5% cobalt alloy (Co), ensures small friction factor and reduces
the danger of chips sticking to drill, what enlarges drilling capacity.
Chemical and thermal process of hardening and precisely sharpened split point reduce drill's wear
and enlarge durability on inside stresses which appear while using.
Suitable for industrial purposes, for alloy and carbon steels treatment with tensile strength up to 900 N/mm²,
stainless steel, heat and acid proof steel, grey cast iron, cast steels, titanium and its alloys.
According to DIN-1412 C.
Necessarily use it together with coolant. The drill is recommended for stationary usage with using drill stand,
drill presses, lathe chucks or face milling cutters.