Master Setting Discs

Master Setting Discs
Master Setting Discs
Master Setting Discs

*Size
 Inch Metric

*Style
 1 2 3


*Required Fields

  • Master setting discs are used to calibrate and set comparators, snap gages, and other precision measuring instruments.
  • Master setting discs are manufactured per ANSI/ASME B47.1
  • Master setting discs are available in 3 styles
  • Inch master setting discs are furnished with black insulators
  • Metric master setting discs are furnished with yellow insulators
  • Roundness and taper of master setting discs does not exceed 50% of the gagemakers size tolerance and is non cumulative
  • Master setting discs are supplied with insulator grips to prevent heat distortion.
  • Precision hand lapped and polished to ensure superior accuracy
  • Manufactured to the highest end of the ANSI specifications to ensure maximum wearability
  • Master setting discs are available in Class XX, X and Z
  • Master setting discs are supplied in steel and chrome
  • Free NIST certificate of accuracy

Master setting discs are used to calibrate and set comparators, adjustable snap gages, automated electronic, pneumatic, microprocessor based gages and other precision measuring instruments that are used to check parts. Master disc are specified sometimes as setting discs. Master Setting Discs are designed to satisfy quality control traceability requirements. Cylindrical master setting discs gages come in different designs based on size.

Master setting discs are available in 3 styles. Style 1 and 3 - Tolerances are applied bilaterally; Style 2 - tolerances are applied unilaterally to the sections; minus on the "GO" section and plus on the "NOGO. Above 1.510 cylindrical master setting discs are manufactured with a through hole. Larger sizes are manufactured with lightning holes. The removal of excess material from the web diameter lightens up the weight for easier use by the operator. WESTport Gage will always manufacture master discs larger than 8.010 using the trilock style and not the annular style described in B47.1

Discs below 1.510 are manufactured with nibs on both ends that are used in manufacturing and later used to glue on an insulating grip as pictured below. The roundness and taper of master setting discs does not exceed 50% of the gagemakers size tolerance and is non cumulative.

All master setting discs are supplied with insulator grips to prevent heat distortion. Style #3 master setting are separated by an A.G.D. separator plate and linked together with a tie rod and insulators. Master setting discs are manufactured per ANSI/ASME B47.1 and are ring lapped to size and hand polished providing for superior accuracy and ensuring maximum gage wearability.

Master setting discs are available in Class XX, X and Z. Master setting discs are supplied in steel, chrome or carbide. Master setting discs are available up to 23” in style #3. Master setting discs above 8.010 are trilock design Sizes above 1.510” to and including 8.510” (AGD standards call for style #3 in place of style #2). Style #3 master setting discs are separated by an (AGD) separator plate and linked together with a tie rod and insulators. XXX and Carbide Master Setting Discs are priced on request. All master discs are traceable to NIST (National Institute of Standards and Technology) and