The shape of the master usually duplicates the manufactured part and they are used for the zero-setting of measuring instruments (with electronic sensors or dial gauges).

Masters are available in the following types of materials:

Standard steel for ARNE gauges (61÷63 HRC)
- C 0.95 Mn 1.1 Cr 0.6 W 0.6 V 0.1
Super-fast steel (HSS) S 600 (64÷65 HRC)
- X82 WMo 0605
Stainless steel AISI 440 C (60÷62 HRC)
Surface coatings to increase hardness, wear resistance, and/or to reduce the friction coefficient are available upon request.
They are supplied with Calibration Reports.

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