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[[Category:Parts]]
[[Category:Motion parts]]

=Introduction=
A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. 

=Challenges=

=Approaches=
==Rigid couplers==

==Flexible couplers==
===Schmidt offset couplers===
===Spider couplers===
===Spring couplers===
===Universal joints===

=References=
* [https://en.wikipedia.org/wiki/Coupling Wikipedia: Coupling]
* [https://www.surpluscenter.com/Power-Transmission/Shaft-Couplers/Keyed-Splined-Hex-1-Piece-Solid-Couplers/1-Shaft-Coupler-1-1563-E.axd Keyed shaft coupler]