gage block

gage block

[′gāj ‚bläk]
(design engineering)
A chrome steel block having two flat, parallel surfaces with the parallel distance between them being the size marked on the block to a guaranteed accuracy of a few millionths of an inch; used as the standard of precise lineal measurement for most manufacturing processes. Also known as precision block; size block.
References in periodicals archive ?
InnoCal announced the launching of gage block calibrations, expanding its portfolio of services by commissioning new dimensional calibration standards.
Minimizing Error Sources in Gage Block Mechanical Comparison Measurements.
In the United States, they had become so important that when the gage block supply was cut off during World War I, the government relieved the problem by having the Bureau of Standards (now NIST) develop a method to mass produce blocks for industry.
To implement this approach, use a gage block equal to the dimension entered in the "specimen geometry" to determine the gap between the fixtures, and zero the LVDT with the gage block defining the opening.
Representing the state-of-the-art of precision gage block calibration is the expanded uncertainty of 10 nm to 30 nm on gage blocks of 10 mm to 1000 mm in length (12).
If we wanted to calculate the thermal expansion of a 4" steel piece or gage block that was being measured in a 76[degrees]F environment we'd use the CTE for steel (0.
The TESA UPD gage block comparators can be used for both direct and comparative measurement of gage blocks.
Edmunds Gages will demonstrate the CAG QCM computer amplifier, Accu-Setter microprocessor gaging column, Trendsetter analog column, 5 and 20 gage block comparators, air gage tooling and cylindrical gages--rings, plugs, and setting discs.
This was a leading factor in Micro's discovery that the gage block route and some plug gages for checking was too time-consuming.
Formerly we relied on gage block setups and digital height towers for our inch-metric accuracy assessments.
It's a good policy to keep a gage block or cylindrical plug handy to check a positive dimension also.
Eliminating the need to compare each block to a master, the system greatly improves speed and accuracy of gage block measurements.