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sprag clutch

Glossary “sprag clutch” Definition:
1). Device containing numerous oblong parts, called sprags, that operate by tilting between an inner and outer race to lock up when the outer race is turned in one direction and to slip when it is turned in the opposite direction. 2). One-way clutch having cam-profiled locking elements that engage cylindrical outer and inner races.

spot weld

Glossary “spot weld” Definition:
Weld made between or upon overlapping members in which bonding may start and occur on the mating surfaces or may proceed from the outer surface of one member.