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2. Gauge block - Wikipedia

   en.wikipedia.org/wiki/Gauge_block

   Metric gauge block set, 112 pcs Another set with 8 pcs, 125 mm - 500 mm Trolley model. Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge ...

3. Micrometer (device) - Wikipedia

   en.wikipedia.org/wiki/Micrometer_(device)

   If the gauge block is known to be 0.75000 ± 0.00005 inch ("seven-fifty plus or minus fifty millionths", that is, "seven hundred fifty thou plus or minus half a tenth"), then the micrometer should measure it as 0.7500 inch. If the micrometer measures 0.7503 inch, then it is out of calibration.

4. Gauge (instrument) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(instrument)

   Gauge block, (also known as a gage block, Johansson gauge, slip gauge, or Jo block) a precision ground and lapped length measuring standard. It is used as a reference for the setting of measuring equipment used in machine shops, such as micrometers, sine bars, calipers, and dial indicators (when used in an inspection role).

5. Length measurement - Wikipedia

   en.wikipedia.org/wiki/Length_measurement

   Gauge blocks are a common method for precise measurement or calibration of measurement tools. For small or microscopic objects, microphotography where the length is calibrated using a graticule can be used. A graticule is a piece that has lines for precise lengths etched into it.

6. Standard (metrology) - Wikipedia

   en.wikipedia.org/wiki/Standard_(metrology)

   A set of gauge blocks are used as a working standard to check the calibration of measurement tools such as micrometers.. An example of a primary standard was the international prototype of the kilogram (IPK) which was the master kilogram and the primary mass standard for the International System of Units (SI).

7. Bore gauge - Wikipedia

   en.wikipedia.org/wiki/Bore_gauge

   The more accurate setting options include ring gauges (also called master rings) and designated bore gauge setting equipment that utilize gauge blocks or other standards. When using a micrometer to set a dial bore gauge, the accuracy of the measurement will be 0.002 inches or 0.0508 millimeters.

8. Snap gauge - Wikipedia

   en.wikipedia.org/wiki/Snap_gauge

   Often, snap gauges will be calibrated by skilled workers and used by semi-skilled workers; the snap gauge is faster than a micrometer and requires less skill to use correctly. Some vendors who resell a different measuring instrument, bore gauge , muddy the waters by referring to them as snap gauges, [ 9 ] [ 10 ] unlike the manufacturer who uses ...

9. Ring gauge - Wikipedia

   en.wikipedia.org/wiki/Ring_gauge

   A ring gauge, or ring gage, is a cylindrical ring of a thermally stable material, often steel, whose inside diameter is finished to gauge tolerance and is used for checking the external diameter of a cylindrical object. [1] Ring gauges are used for comparative gauging as well as for checking, calibrating, or setting of gauges or other standards ...