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What (who) is wrist-pin - definition
PIN THAT HOLDS CONNECTING ROD TO PISTON HEAD
Gudgeon Pin (Internal Combustion Engine); Gudgeon Pin; Wrist pin; Piston pin; Gudgeon pins
![Gudgeon pin connection at connecting rod. Gudgeon pin fits into [[gudgeon]]s inside piston.](https://commons.wikimedia.org/wiki/Special:FilePath/Gudgeon-pin-and-connecting-rod-drawing.svg?width=200 "Gudgeon pin connection at connecting rod. Gudgeon pin fits into [[gudgeon]]s inside piston.")
Gudgeon pin
In internal combustion engines, the gudgeon pin (UK, wrist pin or piston pin US) connects the piston to the connecting rod, and provides a bearing for the connecting rod to pivot upon as the piston moves.Nunney, Malcolm James (2007) "The Reciprocating Piston Petrol Engine: Gudgeon pins and their location" Light and heavy vehicle technology (4th ed.
gudgeon pin
¦ noun a pin holding a piston rod and a connecting rod together.
Spring pin
MECHANICAL FASTENER THAT SECURES THE POSITION OF TWO OR MORE PARTS RELATIVE TO EACH OTHER
Roll pin; Sellock pin; Coiled spring pins; Mills pin; Tension pin
A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the hole diameter, and a chamfer on either one or both ends to facilitate starting the pin into the hole.
Wikipedia
Gudgeon pin
In internal combustion engines, the gudgeon pin (UK, wrist pin or piston pin US) connects the piston to the connecting rod, and provides a bearing for the connecting rod to pivot upon as the piston moves. In very early engine designs, including those driven by steam, and many very large stationary or marine engines, the gudgeon pin is located in a sliding crosshead that connects to the piston via a rod. A gudgeon is a pivot or journal. The origin of the word gudgeon is the Middle English word gojoun, which originated from the Middle French word goujon. Its first known use was in the 15th century.
