Karnasch Step drills were developed to drill perfectly round and simultaneously deburring holes in sheet metal up to 4mm thickness.

Karnasch Professional Tools Step Drills & Tube and sheet drills are made of high-alloy steel called HSS-XE for reaching a surface hardness up to 68 HRC. These results in high wear resistance and service life.

All Step drills & Tube and sheet drills are available in the patented BLUE-DUR or TIN-GOLD coating. Coatings significantly increase the service life. Strongly recommended for difficult materials such as stainless steels and if drilling without/less coolant.

All Step drills & Tube and sheet drills comes with lasering the diameters inside the spiral/flute. Very convenient during the drilling process.

The user always sees the cutting depths reached. All Step drills & Tube and sheet drills are CBN ground from solid material.

All step drills & Tube and sheet drills available spiral fluted for:

smooth cutting behaviour

no sticking in the material

low cutting force

less burrs on the work piece

longer service life

Available in diameter 4-60mm.

For drilling and deburring in steel, stainless steels, non-ferrous metals such as alu, copper, brass as well as for plastics.