COFA-X – Deburring of 1:1 cross bores

The mechanical deburring tool for cross bores with a diameter ratio of 1:1.

Cross bores with almost identical diameters show a very high unevenness. With the new COFA-X technology, it is possible to mechanically remove the burrs completely from these uneven surfaces in an automated process. As a solution provider, we are making use of today's machine capabilities and combining them with a new tool, the COFA-X system, to solve the challenge of removing burrs from uneven surfaces. The defined cutting process using a carbide blade is responsible for a complete edge break. In other words the edge is burr-free.

Application situations

  • Intersecting bores up to a main bore - cross bore ratio of 1:1.
  • Crossing bores with center axis offset.
  • Bores with interfering edges that shield the surface (bore edge) to be deburred indirectly.

Function principle

Tool function
COFA-X is the first and only tooling system that removes the burrs from interior uneven bore edges in applications with large intersections. It works reliably in NC-operated applications. Its simple and mechanically-controlled function principle increases the process reliability and reduces your process costs remarkably at the same time.

The COFA-X application range starts with bore diameters of Ø5.0 mm and larger. In all cases, COFA-X tools are designed individually according to the customers' needs through a complete application description. With the right tool in place, the machining process using COFA-X does not allow any secondary burrs at all. Each specific tool machines one diameter only.

The machine requirements also play an important role for the reliable NC operation. The tool has to be entered into the bore with an offset.

Blade function
The blades possess special geometries. They are designed either for front or back cutting only. In addition, the blades are pre-loaded by the spring. Accordingly, the blade position is different. 


In comparison with the standard COFA system, COFA-X possesses a pre-loaded blade and the tip of the tool body shows a recess. This recess is necessary in order to enter the bore with an offset so that the blade does not suffer. The tool itself is characterized by its simple setup.

The exchangeable spring is held safely in the tool body by two split pins. It controls the movement of the blade and resets it to the inital position after machining.

The multiple use of blade and spring within a series is given. Only the tool body has to be selected according to the bore diameter.

COFA-X Product documentation

What's next?

Have you got an unsolved deburring issue you would like to resolve with us?

  • Any viable solution begins with a clear description of the application. Please define your demands and expectations in a comprehensive and detailed manner. Please focus therefor on the following important aspects:
  • Description of the present deburring process
  • Details of the bore and the application
  • Description of the environment: Machine, clamping, fixture, spatial conditions, interfering edges
  • Number of bores to be deburred
  • Cycle time? Present solution? Present time (Actual/Target)?
  • Is there any function assigned to the deburred surface?
  • Description of the desired final result / target description
  • What has to be observed imperatively when designing the new deburring process?
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