Article
Article
Allowance
Article By:
Black, Paul H. Department of Mechanical Engineering, Ohio University, Athens, Ohio.
Last reviewed:August 2019
DOI:https://doi.org/10.1036/1097-8542.024600
An intentional difference in sizes of two mating parts. With running or sliding fits, in which mating parts move relative to each other, allowance is a clearance, usually for a film of oil. In this sense, allowance is the space “allowed” for motion between parts. To avoid binding between parts, a minimum clearance is critical for a running fit.
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