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Swiss Precision Since 1961 

"Our production is up and tool cost is down.  The COFA tool made a big difference on this part."

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How Does It Work?

Controlled by a simple spring, the carbide cutting blade follows the contour of the hole’s surface removing all burrs while creating an even tapered corner break. The blade does not cut as it passes through the bore and will not damage the hole’s surface. The edge break begins only at the point where the blade makes contact with the material and then tapers the hole’s edge. This allows for faster feed rates since the tool slows itself down as it enters the through hole. 

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COFA

The Universal Deburring Tool

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  • Specifically designed for front and back deburring on even and uneven bore edges using CNC machinery
  • Perfect for a range of cross hole deburring applications including sloped bores
  • ID/OD deburring
  • No stopping or reversing the spindle
  • Even and consistent edge break
  • Suitable for all ranges of machine materials
  • Available in smaller sizes for micro-deburring applications
  • Coated carbide blades guarantee a long tool life and faster feeds and speeds
  • Typical applications include forks, yokes, common rails, castings, tubes with cross bores, and other work pieces with cross bores in main bores 

 

 Available from stock for immediate delivery in sizes
from 2 mm to 41 mm (0.090" to 1.614")
Cassette option available for larger hole sizes 

Cofa deburring tools catalog

How Do I Order a COFA Deburring Tool?

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1. Choose the tool that best fits the hole diameter. You can use our Tool Selector for assistance.
2. Choose the blade that best fits the hole geometry.
3. Choose the spring that best fits the material.

 View Application Data Sheet 

Questions? Contact Your Local Agent

 

COFA Case Study

Replacing Time-Consuming Manual Deburring for Cross Holes

 

Challenge:

A mechanical engineering company was deburring the bores in this bushing manually. What made the deburring difficult was the fact that the bores were located in the lubrication groove. The task was to deburr the outer and the inner bore edge of these cross bores automatically.

Picture of a brass bushing machined with a COFA deburring tool for brass

Application details

  • Outer diameter: Ø144.0 mm
  • Inner diameter: Ø130.0 mm
  • Crossbore diameter: Ø6.0 mm
  • Material: Brass
Picture of a through hole that has been deburred with a deburring tool for brass

Solution

Tool: COFA6/6.0/H
Blade: GH-C-M-0002

The difficulty to deburr the bores thouroughly lies in interior of the bushing. These grooves put high demands on the blade. This is why low cutting values have to be applied. The blade has to be given enough time to follow the bore edge.

 

 

Machining parameters:

Working speed: 500 rev./min.
Working feed: 0.1 mm/rev.
Coolant: external coolant

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Results

Time-consuming manual deburring was replaced with the HEULE COFA tool for time-saving results.

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