BURR
Burr is the excess material pushed up along the edges of a part during machining and cutting operations: drilling, Milling, cutting teeth, filing or blanking. It appears as a thin ridge or irregular edge that protrudes beyond the desired profile. In watchmaking, where tolerances are minuscule, burr is undesirable: it hinders assembly, disrupts the meshing of gear teeth, traps impurities, and can break off to contaminate the Movement. Its removal, called deburring, is therefore a systematic finishing step. It is carried out using files, burnishers, abrasives, or mechanical and chemical (tribological) processes suited to small parts. Beyond the functional aspect, the absence of burrs contributes to the perceived quality of a component and prepares the surfaces for decoration operations, such as Beveling / Angling. Inspecting and removing burrs is both a matter of manufacturing care and the demands of testing quality.
Useful links:
– Machines
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