Linderoth, L. Sigfred, Jr. Department of Mechanical Engineering, Duke University, Durham, North Carolina.
- Additional Reading
A form of spring used principally as a fastener. Piston rings are a form of snap ring used as seals. The ring is elastically deformed, put in place, and allowed to snap back toward its unstressed position into a groove or recess. The snap ring may be used externally to provide a shoulder that retains a wheel or a bearing race on a shaft, or it may be used internally to provide a construction that confines a bearing race in the bore of a machine frame (see illustration). The size of the ring and its recess determines its strength under load. Sufficient clearance and play is needed in the machine so that the ring can be inserted and seated. See also: Antifriction bearing; Internal combustion engine; Spring (machines)
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