Masters and Setting Gages Information

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While similar to other gages in that they help to set and determine gauging standards, masters gages and setting gages are not used with other specific devices, instruments and sensors. Instead, masters gages and setting gages provide dimensional standards for calibrating other gages.  Masters gages and setting gages are designed to variety of tolerance grades in both metric and English dimensions. Gage blocks, end measuring rods, setting plugs, setting discs, setting rings, and thread standards are masters gages and setting gages that fit into this category. 

Gage blocks provide fixed length, thickness, or angle standards and are manufactured to specific flatness, parallelism, and dimensional standards.  End measuring rods or micrometer standards are fixed length setting gage or standards used for checking or calibrating micrometers or other length / thickness gages.  End measuring rods consist of long, ground bars manufactured to precise tolerances, and with a central insulating handle.  Precision gage balls are precisely manufactured spherically shapes for gaging spherical cavities, tapered holes, or machine tool set up.

Setting rings, setting pins, setting discs and other setting gages are used to calibrate production functional gages for go / no-go assessment compared to specified tolerance.  Setting plugs are used for assessment of hole and slot dimensions or locations compared to specified tolerances.  Similarly, setting ring gages are used for assessment of the attributes of pins, shafts, or threaded studs.  Setting discs, also known as annular plugs, are large plug gages (over

8" in diameter) use an annular disc design where the internal section is cut down to reduce weight and improve handling.  Setting discs have a similar design and are used to set or check micrometer or other OD gages.

Other types of masters gages and setting gages include master gage blocks, master or setting discs, and setting rings are types of master gages used to calibrate or set micrometers, comparators, or other gaging systems.  Working gages are used in the shop for dimensional inspection and periodically checked against a master gage.

Related Products & Services

  • Bore and ID Gages

    Bore and ID gages are designed for internal diameter dimensional measurement or assessment.

  • Calipers

    Calipers typically use a precise slide movement for inside, outside, depth or step measurements. Some caliper types are used for comparing or transferring dimensions.

  • Depth Gages

    Depth gages are used to measure of the depth of holes, cavities, or other component features.

  • Dimensional Indicators and Comparators

    Dimensional indicators and comparators measure where the linear movement of a precision spindle or probe is amplified.

  • Gage Blocks

    Gage blocks are manufactured to precise gagemaker tolerance grades for calibrating, checking, and setting fixed and comparative gages.

  • Micrometers

    Micrometers are instruments for precision dimensional gaging consisting of a ground spindle and anvil mounted in a C-shaped steel frame.  Noncontact laser micrometers are also available.

  • Snap Gages

    Snap gages are used in production settings where specific diametrical or thickness measurements must be repeated frequently with precision and accuracy.

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