Case Studies

Deburring Bores on Hard-to-Reach Irregular Surfaces

Posted on: February 12, 2018
Tags: COFA, Automotive, Steel, Deburring
cross bore with irregular surface

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This manufacturer machines V-8 crankshafts that consist of a main bore that breaks out into seven different surfaces, some which are angled/irregular cast surfaces. They needed a tool solution that was able to reach all of the large exit burrs on the part.

HEULE Cofa tool deburring a crankshaft

Application details:

•Machine: Custom, no coolant
•Material: steel

Cofa deburring a crankshaft


The solution from HEULE is a special C12 COFA with a 20° “M” blade and “S” spring.

Machining parameters:

Feed: 1.25 mm/s

Speed” 280 RPM

deburring tool for sloped surfaces


The COFA tool has a cutting blade which is able to pivot and successfully deburr all of the flat and angled/irregular surfaces by entering through the main bore to reach the seven different bores. The customer is pleased with the automated solution and the tool performance.



Interested in the COFA deburring tool? Visit the COFA 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.