Gears have a standardized geometry. Their measurement is carried out according to DIN 3962. Very small modules (approx. 0.03) can occur, especially with plastic gears. Profile form deviation, flank line deviation and pitch are measured. For micro gears, the tolerances are in the range of a few µm. While measurement time is considered, it is of secondary importance. A difficulty for the mostly contact measurement is the rigid holding of the workpieces.
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