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It is shown that, unlike other means of measuring linear dimensions, coating thickness gauges do not have a regulatory framework governing their accuracy (error). It is noted that a number of external factors influence the reliability of the results of coating thickness measurements. Using the example of coating thickness gauges, the difference in the measurement results for two-point and zero calibration is shown.

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It is shown that normalizing the thickness of coatings in the design of products and finding the actual value of the thickness of the coating layer with a given accuracy in manufacturing is a pressing task. An analysis of the regulatory documentation was carried out, which showed that there are recommendations for normalizing the thickness of the coating to select only the minimum thickness of the coating. The maximum thickness of the coatings is not regulated, which leads to unnecessary over expenditure of the coating material, energy and other costs and does not allow selecting the means of measuring the thickness of the coatings depending on accuracy.

The relevance and advantages of hydrostatic supports in test and measuring equipment are shown. Structural and operational features are given when using hydrostatic supports as hydrostatic guides in vibration bars, vibration systems and measuring devices, ensuring minimum friction and smooth movement. The use of spherical hydrostatic bearings in ball joints allowing to create high-frequency pulse systems is shown. Examples of application of hydrostatic bearings in actuators, drives and spindle assemblies of test and measuring equipment are given.