Reverse deburring tools

Through holes throw up burr both on the drill entry side and on the exit side. Removal of the burr on the front is generally possible using conventional means. The rear edge of the drill hole is generally difficult to access (e.g. transverse drill holes, forked elements), or the workpiece has to be laboriously turned and clamped again for repeat machining.

Reverse deburring tools remove the burr at the front and/or back of a through hole in a single work process – with the utmost precision and time savings. Using different cutting insert materials and cutting angles, they work with the utmost process reliability and efficiency. They can be used manually in drilling machines or also automatic CNC machines or machining centres.

A reverse deburring tool in a slotted configuration deburs the tool under spring pressure. The integrated cutting edges deburr the front and rear of the drill hole.

Using a reverse deburring tool with sprung cutter, the chamfer size of the drill hole can be influenced by altering the spring pressure. When it passes through the drill hole, the blade penetrates into the body. By emerging at the rear, the spring tension allows the cutter to extend again. Use of the right grade of cutting insert can affect the service life.


  • Boreholes with different diameters in the hydraulic industry and in general mechanical engineering
  • Control boreholes and valve block manufacture
  • Components for the automotive industry (leakage oil or throttle bores)
  • Small boreholes in supply parts (e.g. oil, lubrication or pressure relief boreholes)