Oldham Coupling
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The oldham coupling is a form of flexible coupling designed for applications that must be free from backlash.The oldham coupling consists of three discs. Two of the discs, typically made of aluminum or stainless steel, are connected to either side of the drive, while the third, made from one of several different plastics, is sandwiched in between with a tongue and groove design. The tongue and groove on one side is perpendicular to the tongue and groove on the other. Springs are often used to reduce the coupling’s backlash.
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