Twist drill made of high-speed steel (4241) with hardness 62°HRc (+/-2°) and with point angle 118°,
straight cut without thinning, good for hand grinding.
Spiral dextrorotatory drill, spiral type N, hot rolled forged, with a high flexibility and torsional strength,
ground edges. Diameter tolerance h8
Cylindrical shank matching drill's diameter.
The drill's surface is coated with oxide layer, what ensures small friction factor and reduces the danger
of chips sticking to drill, what enlarges drilling capacity.
xxx - Suitable for general purposes, for alloy and carbon steels treatment with hardness up to 250Bhn,
for grey cast iron, non-ferrous metals as well as hardened plastics.
According to DIN-338.
xxx - Use it together with coolant.
Recommended coolants: drilling emulsion, cutting fluid, ester based oil.
xxx - While using right coolant drill's durability quadruples.
xxx - Selection of right coolant depends on kind of materials treatment.