Step drill for metal 6-36mm HSS-XE with spiral groove, Karnasch

Cobalt step drill for metal, steel, stainless steel, acrylic glass and non-ferrous metals

Range: 6-36mm
Diameters: 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 - 22 - 24 - 26 - 28 - 30 - 33(36 needling diameter) mm
Number of cutting edges: 2

Shank diameter: 10 mm, with three faces against rotation in the chuck
Total length(vč . shank): 92mm

Max. thickness of drilled material: 4mm
Material: HSS-XE - high-alloy cobalt high-speed HSSE steel(68 HRC)
Coating: BLUE-DUR, increases the life of the drill when drilling with very limited cooling(spray, paste), as well as for dry cutting

Cutting conditions - steel: 1100 to 180 rpm
Cutting conditions - stainless steel: 550 to 100 rpm
Smaller diameters can be drilled at higher speeds, with increasing with the drilling diameter, the cutting speed and speed must be reduced. Failure to speed up or overheat the drill may cause it to become dull.

At the same time, transitions to a larger diameter perfectly needle the drilled hole.

Thanks to the spiral groove, the drilling is smooth, the chips do not stick, low cutting forces, the drilled material has less burrs and the tool has a longer life.