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Air Flow Rate as a Test For Gage Block Wringing
L A Guildner1, R L Anderson1, R E Edsinger1
1Institute for Basic Standards, National Bureau of Standards, Washington, D.C. 20234.
Abstract:
Gage blocks can be joined by "wringing" to produce a vacuum-tight joint. Hoke gage blocks have square gaging surfaces with a central hole connecting them. The quality of the joints between blocks can be tested by measuring the vacuum leak rates through the joints into the central hole. When two Hoke blocks are in contact at one edge but tilted at an angle ϕ, the vacuum leak rate into a chamber of 22 cm3 produces a rate of pressure increase which can be represented by the following polynomial:
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