Back to deburring


Front and back deburring of even and slightly uneven bores in one single pass

  • Deburring of bore diameters from 1.0 mm – 2.1 mm
  • Maximum blade life thanks to integrated cooling of the cutting edge
  • Very short cycle time
  • Simple blade change 
DL2 | Catalogue
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Tool Selector


The demands on the deburring quality of the smallest bores are increasing all the time – such as in medical and electronic applications, the aircraft industry and the luxury watchmaking industry. 


The DL2 with its operating principle offers the appropriate solution with a wide range of workpiece materials such as steel, stainless steel, titanium, aluminium or composite materials.  The range includes tools for use on bore diameters from 1.0 mm to 2.1 mm. The working lengths range from 3.0 mm to 10.0 mm. The deburring size is approx. 0.15 mm radial. 


BoreMax. deburring sizeTool series
Ø1.00 – Ø2.10 mm0.15 – 0.20mmDL2

Should no standard tool solution be available for your application, HEULE can make a detailed application analysis. The result will be an application-specific solution. 


The DL2 deburring tool has a very simple design, consisting of only four components. The spring and the ground carbide blade have been integrated into a single unit. This simple construction is extremely advantageous, especially when changing the blade. The tiny blade can easily be replaced directly in the machine without the need for tweezers or a magnifying glass.


The mini deburring tool's main construction consists of the tool body and blade housing. The coolant sleeve, which directs the coolant into the blade window, guarantees that the blade edge is flushed at all times. The smaller the tool, the greater the importance of coolant for reliable operation.

Tool Concept
  1. Blade
  2. Blade housing
  3. Tool body
  4. Clamping screw
Arbeitsweise Entgratwerkzeug DL2

Process steps description

With working feed, the deburring tool DL2 moves into the bore and removes the burr from the bore’s front edge. Upon completion of deburring, the blade automatically retracts into the blade housing. The specially designed sliding surface of the blade prevents damage to the bore when passing through.


When exiting the bore, the spring-loaded blade returns to its neutral position and is ready to deburr the bore’s back edge. This is done without stopping the spindle or changing its rotational direction. The machining process creates a completely burr-free edge.


Are you interested in learning more about the DL2 technology? You can find additional information in our downloads centre.


How do you deburr mini-bores?

We reveal how in our 20-minute Online Seminar "Deburring down to a diameter of 1.0 mm". Feel free to watch by clicking on the link below. 

Application examples
Mini deburring tool in use
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Watch case | Process-reliable series deburring of the smallest bores.
Would you like to discuss your deburring requirements?

We are pleased to assist.

Thanks to our worldwide network of branch offices and approximately 50 sales partners in 35 countries, HEULE competence and know-how is always within quick and easy reach.

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