Swiss Precision Since 1961 

COFA-X cross hole deburring tool


The 1:1 Ratio Cross Hole Deburring Tool

  • The first and only tooling system for removing burrs consistently from interior uneven bore edges with large intersections, completely eliminating secondary burrs
  • Designed for cross holes with an identical or nearly identical diameter crossing each other; bores which merge into one another; and crossing bores with offset centers.
  • Effective on fittings, hydraulic manifolds, and other components with 1:1 ratio of holes.
  • Carbide blade gives a complete edge break that is completely burr-free
  • Reduces costs and improves cycle time for operations that were previously only possible by hand deburring
  • Pre-assembled with spring-loaded blade geometry for either front or back cutting 

Customized tooling available for a range of hole sizes starting at 4 mm



The New Solution for Complex Cross Bores on Extreme Uneven Surfaces

Driven by customer demand for more efficient solutions to complex cross bore applications, HEULE developed a new tool to help high-volume manufacturers produce better parts faster and keep up with their production demands. The COFA-X tool allows machine operators to eliminate tedious manual deburring of hard-to-reach cross bores and focus more attention on production. 

How Do I Order a COFA-X Tool? 

View COFA-X Brochure

COFA-X Tools are fully customized and built for your specific application. Please see the COFA-X brochure for more ordering information and Contact Your Local Agent for assistance.

COFA-X Case Study

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Automating Cross Hole Deburring on a Hydraulic Component


A manufacturer of hydraulic components and fittings was looking for a more efficient and safer deburring solution for the cross hole of a ball valve. The goal was to automate the process and eliminate the tedious and time-consuming work of removing the burrs of the bore edge by hand with a brush.

cross hole deburring a crosspiece of a hydraulic ball valve

Application Details

  • Cross bore / lateral bore: Ø10.4 mm
  • Main bore: Ø10.4 mm
  • Material: SS316
  • Machine: DOOSAN CNC Center
COFA-X tool deburring cross holes in a ball valve/hydraulic component


The deburring of crossbores with bore-Ø-ratio of 1:1 represented a particular challenge for HEULE. The solutions that were available so far could not cope with the extreme sloping of a 1:1 bore and a completely new approach was needed. HEULE found the answer to the problem by making use of new machine capabilities and by developing a special version of the COFA tool (the new COFA-X). 

Machining parameters:

  • Speed: 10 m/min
  • Feed: 0.06 mm/U
  • Coolant: external coolant
ball valve deburred with the COFA-X cross hole deburring tool by HEULE


The fact that the deburring could be carried out in an automated process together with a considerable improvement in reliability resulted in significant savings and product quality. After the initial pilot project, the manufacturer was able to continue with high volume production of more similar T pieces.

Need help selecting a tool? Visit our online Tool Selector and go to the Locate Agent page on our website to find your local technical sales representative. For more assistance, contact us at or 513-860-9900 and we'll be happy to point you in the right direction.