Universal joint
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A universal joint is a joint or coupling connecting rigid shafts whose axes are inclined to each other. It is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges locat
Universal joints in a driveshaft
Constant-velocity joint
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A constant-velocity joint is a mechanical connection between two rotating shafts, that keeps them rotating at the same speed, while allowing the shafts to be at an angle to each other as they rotate.
Universal joint
…motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft. The universal joint is not a constant-velocity joint. U-joints are also sometimes called by various eponymous names, as follows…
Tracta Joint
Rzeppa joint (compared to a 1 euro coin)
A diagram of a Thompson coupling