Burr (cutter)

Burr (cutter)
A selection of carbide burrs

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Overview

Burrs (sometimes called rotary files) are small cutters used in die grinders, rotary tools or dentist's drills. The name may be considered appropriate when their small sized head (3 mm diameter shaft) is compared to that of a seed of the burr (fruit)|burr fruit.

To maintain the correct surface speed and cutting conditions they are rotated at the highest speed possible, commensurate with their size and construction. The cutters shown in the image are made from tungsten carbide which allows them to run at higher speeds than similar High speed steel|HSS cutters, yet still maintain their cutting edges.

Burrs (the tools) are also used in Cnc|CNC machining centers for removing Burr (metal)|burrs (the small flakes of metal) after a machining process.

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