Case Studies

Deburring 1:1 Ratio Oil Bores on a Crankshaft

Posted on: October 1, 2018
Tags: Automotive, Precision Machining, Steel, Cross Hole Deburring, COFA-X
cross bore deburring crankshaft

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A manufacturer was deburring the oil bores on these crankshafts by hand for a large automotive customer. After repeated complaints from the customer, the manufacturer set out to look for a more reliable process for producing higher quality parts. HEULE determined that the application was suitable for the newly-innovated COFA-X, currently the only automated solution available on the market for deburring 1:1 ratio cross bores. 


cross bore deburring crankshaft

Application Details: 

  • Bore diameter: Ø 8.0 mm intersecting with main bore Ø 8.5 mm
  • Material: 42CrMoA
  • Machining: horizontal
  • Volume: 1 Million bores per year
cross bore deburring tool


COFA C6X 8.0 S with blade C6X-M-0001-T: The COFA-X tool was designed for the deburring of cross bores with a bore diameter ratio of 1:1.

Machining parameters:

  • Cutting data: 
    Speed: 500 rev/min.
    Feed: 0.1 mm/rev
  • Machine: Shenyang CNC
  • Processing: horizontally


The customer was able to replace the manual work by an automated process. The deburring result is now stable and shows an improved quality, too. The customer appreciates the simple and safe handling of the tool that functions without pre-adjustments.

 Interested in the COFA-X tool for cross hole deburring? Visit the COFA-X product page for more info. 

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.