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What is a shrinkage Allowances?

Updated: 9/20/2023
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12y ago

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When heat treating a metal... it will shrink. You must make a part larger than needed so when treated it shrinks to size. The difference between these two sizes is the shrinkage allowance.

Example... a 1/4-20 threaded hole should be .003 bigger before heat treat so when done it will fit.

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12y ago
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