Countersinks (chamferers)

Countersinks (chamfering) Bohre

According to the official terminology adopted in the system of technical regulation, countersinking is "an axial cutting tool to increase the accuracy of the shape of the hole and increase its diameter" (GOST 25751-83). The difference between countersinks and countersinks is the teeth on the end of the working part and the guiding pins for precise entry of the tool into the machined hole.

Advantages of Bohre countersinks

A countersink consists of a working part and a shank. Shanks can be cylindrical and conical, the structure of the working part is determined by the purpose of the tool.

Bohre tapered countersinks are used for machining holes in order to chamfer and form conical recesses for fasteners. Countersinks (chamfering tools) consist of a working part and a shank. Working parts of Bohre countersinks are cone-shaped with an apex angle of 90° and are equipped with three cutting teeth. The countersinks are available with shanks in two versions - Weldon 19.05 mm and cylindrical, with diameters from 8 to 16 mm. Translated with www.DeepL.com/Translator (free version)

Edge geometry

Bohre™ aligned end-face sharpening geometry allows for extended countersinking life without loss of countersinking efficiency

Sharpening of blades

Unique blade sharpening and bohre™ chip groove geometry ensure efficient and accurate countersinking

Weldon universal shank

Fits Weldon 19.05 spindle magnet machines from all manufacturers

  • Edge geometry

    Bohre™ aligned end-face sharpening geometry allows for extended countersinking life without loss of countersinking efficiency

  • Sharpening of blades

    Unique blade sharpening and bohre™ chip groove geometry ensure efficient and accurate countersinking

  • Weldon universal shank

    Fits Weldon 19.05 spindle magnet machines from all manufacturers

  • The bohre™ aligned geometry of the end faces allows for increased countersinking life without loss of countersinking efficiency.

  • Blade Sharpening. Unique blade sharpening and bohre™ chip groove geometry ensure efficient and accurate countersinking

  • Universal Weldon shank. Fits any manufacturer's magnetic machine tools with Weldon 19.05 spindle

In mechanical engineering, conical countersinks are used to solve the technological problem of creating high-quality bearing surfaces for fasteners (bolts, screws, nuts, etc.). Spiral drills are ineffective in this area due to the peculiarities of their design. When machining conical holes for fasteners, tools with two main cutting edges do not allow obtaining quality results. Countersinks due to their design successfully cope with this task.

Bohre countersinks with Weldon shank

Item number Product name
00006090 Chamfer 3-25*45*90°
К0006275 Chamfer 3-30*47*90°
К0006170 Chamfer 3-40*52*90°
К0006670 Chamfer 3-50*57*90°
К0006671 Chamfer 3-55*60*90°

The designation of a countersink (chamfer) with Weldon shank includes four symbols:

  1. symbol (number) identifying the number of teeth;
  2. symbol (number) identifying the diameter of the working part;
  3. character (number) identifying the total length;
  4. symbol (number) identifying the angle of the cone;

Bohre chasers with cylindrical shank

Item number Product name
К0006673 Chamfer 8 3-12,4*56*90°
К0006674 Chamfer 10 3-16,5*60*90°
К0006675 Chamfer 10 3-20,5*63*90°
К0006676 Chamfer 10 3-25*67*90°
К0006677 Chamfer 12 3-31*71*90°
К0006678 Chamfer 16 3-40*100*90°

The designation of a countersink (chamfering) with c/r includes five symbols:

  1. symbol (number) identifying the diameter of the cylindrical shank;
  2. symbol (number) identifying the number of teeth;
  3. symbol (number) identifying the diameter of the working part;
  4. character (number) identifying the total length;
  5. symbol (number) identifying the angle of the cone;

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