Step drill for metal 4-20mm HSS-XE TiN with straight slot, Karnasch

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

Range: 4-20mm
Diameters: 4 - 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 mm
Number of edges: 2

Shank diameter: 8 mm, with three faces against rotation in the chuck
Total length(vč. shank): 75mm

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

Cutting conditions - steel: 1600 to 320 rpm
Cutting conditions - stainless steel: 800 to 160 rpm
Smaller diameters can be drilled at at higher speeds, with increasing drilling diameter, the cutting speed and speed need to 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.

The straight groove drill is ideal for drilling in hand and cordless drills. Also suitable for thin sheets. Holes up to a diameter of 40 mm can be drilled in the hand in this way.