Karnasch premium step drills & tube and sheet drills

One of the most comprehensive stock ranges of step drills and tube and sheet drills

Karnasch step drills are designed to produce perfect circular and simultaneously deburred holes in sheets up to 4 mm. The transition from one step to the other is used for chamfering or deburring the drill hole.

The Karnasch tube and sheet drills are designed for drilling thin sheets up to 4 mm. They are ideal for enlarging existing holes, drilling oblique holes and creating interlocking holes. The peeling cut produces almost burr-free holes on both sides.

1

Steel <1100N, stainless steel, aluminum, copper, plastics, gray cast iron, hardox and rails

2

Steel <900N, stainless steel, aluminum, copper, plastics and gray cast iron

Step drills & tube and sheet drills for machining of steel <1100N, stainless steel, aluminum, copper, plastics, gray cast iron, hardox and rails

  • From Ø 4 mm to 60 mm
  • 2 or 3 cutting edges
  • Spiral fluted or straight fluted
  • CBN-grinded
  • Specially adjusted coating

Stufenbohrer & Blechschälbohrer für die Bearbeitung von Stahl <900N, Edelstahl, Alu, Kupfer, Kunststoffe und Grauguss

  • From Ø 4 mm to 60 mm
  • 2 or 3 cutting edges
  • Spiral fluted or straight fluted
  • CBN-grinded
  • Specially adjusted coating
Premium step drills

Also available in a kit!

Karnasch step drils are also available in a kit with three different step drills. Choose between different sep drill kits the one that is best suited for your project.

Discover our kits

HSS-XE step drills & tube and sheet drills

Karnasch HSS-XE step drills and HSS-XE tube and sheet drills are available in spiral or straight fluted versions. The special 3 surface shank provides excellent torque transmission, no slipping in the chuck and thus enables a significantly higher cutting performance.

All step drills and tube and sheet drills are available in the patented BLUE-DUR coating or in TiN-GOLD coating. Coatings significantly increase tool life and are highly recommended for difficult materials such as stainless steels and for drilling without lubricants.

All step drills and tube and sheet drills come with lasered diameters in the spiral and are made of high alloy HSS-XE steel - for a hardness up to 68 HRC.

Karnasch step drills and tube and sheet drills guarantee smooth cutting, no getting caught in the material, low cutting forces, less burr formation and longer tool life.

step drills / tube and sheet drills - product overview

Step drill / tube and sheet drill characteristics
 
  1. Diameter range from 4 mm to 60 mm 
  2. 2 and 3 cutting edges
  3. Spiral fluted or straight fluted
  4. CBN-ground
  5. BLUE-DUR or TiN-GOLD coated
Step drill / tube and sheet drill applications
 
  1. Steel  
  2. Stainless steel
  3. Aluminum
  4. Copper
  5. Plastics
  6. Gray cast iron
  7. Hardox
  8. Rails

Karnasch step drills / tube and sheet drills –  PREMIUM QUALITY FOR PROFESSIONAL APPLICATIONS



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Special 3 surface shank

Best results

The special 3 surface shank provides excellent torque transmission and no slipping in the chuck.

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Significantly higher cutting performance

First-class finishings

The step drills and tube and sheet drills are available in spiral or straight fluted versions. The 3 surface shank and the excellent processing enable a significantly higher cutting performance.

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Diameter range

From 4 mm to 60 mm

Highest precision for perfect results due to narrow engineering tolerances. 

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Specially adjusted coatings

Patented BLUE-DUR coating or TiN-GOLD coating

All step drills and tube and sheet drills are available in the patented BLUE-DUR coating or in TiN-GOLD coating. These coatings significantly increase tool life and are highly recommended for difficult materials such as stainless steels and for drilling without lubricants.


KARNASCH COATINGS

Tool coatings
for longer tool lives

Karnasch tool coatings - keeping cool even under extreme conditions

Karnasch high precision tools are available with heat-resistant high performance coatings for longer tool lives. The various coatings are adjusted to the materials that are to be processed.

Tool coatings
for longer tool lives

Karnasch tool coatings in highest quality

Professionals rely on tool coatings! Achieve optimal results with the premium coatings by Karnasch. Each of our coatings is adjusted to the materials that are to be processed. Choose between ten special coatings: from droplet-free nanocrystalline diamond coating over BLACK-TEC, BLUE-TEC, BLUE-DUR and DURABLUE up to HXC-Nano3, Tcx3, NHC-7000, Kx, DMC-X2, TiN and TiN-GOLD.

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