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Traceable Calibration of Master Gears at PTB
The PTB (Physikalisch-Technische Bundesanstalt) is able to measure (calibrate) master gears for industry traceable to national gear standards and in compliance with the International System of Units (SI). For this purpose primary gear standards and standard measuring devices for the reference values Fa, Fb, Fò (total profile deviation, total helix deviation, total cumulative pitch deviation) being available. To calibrate the master gears of industry, PTB mostly uses coordinate measuring machines (CMMs) which are traceable by instrument-specific calibration methods. In addition, with the aid of the PTB’s primary standards, a task specific uncertainty of measurement is determined for all gearing calibrations carried out for industry, which is taken into account as correction value when the transfer measurement uncertainty is stated.
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