Burr (cutter)
Burrs or burs (sometimes called rotary files)
Description
Burrs are a
To achieve optimal surface speed and cutting conditions, burrs are rapidly rotated at high speeds, often in the range of thousands or tens of thousands of RPM, which is typically the maximum speed supported by a given spindle. The cutters depicted in the image, being made of tungsten carbide, can withstand and operate at these elevated speeds. This allows them to function at higher velocities compared to equivalent "HSS" (High-Speed Steel) cutters, all the while retaining the sharpness of their cutting edges.
Because the cutting edges of burrs are so small, they can often be touched when spinning by a finger without cutting the skin, which flexes out of the way, although it would not be safe to pinch or grip them from two sides. Hard metal or ceramic workpieces cannot flex beyond the cutting edges, so the tools remove material from them. This characteristic makes burrs suitable for use in dentistry, as the tool will grind the hard enamel of teeth, yet leaves soft mouth tissues unharmed if the tool should unintentionally touch them.[4]
References
- ^ Customs Bulletin and Decisions: Regulations, Rulings, Decisions, and Notices Concerning Customs and Related Matters of the United States Court of Customs and Patent Appeals and the United States Customs Court. Department of the Treasury, U.S. Customs Service. 1976. Retrieved 2024-02-02.
- ISBN 978-0-412-99181-3. Retrieved 2024-02-02.
- ^ "Essential CNC Router Accessories". CNC Sourced. Retrieved 2024-02-02.
- ISBN 978-1-118-43215-0.