Difference between Knuckle joint and Cotter joint

A knuckle joint is a form of pin joint that is used to connect two tension-loaded components. Otherside,  A cotter joint, also known as a socket and spigot joint, is a way of connecting two coaxial rods temporarily.

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Difference between Knuckle joint and Cotter joint:

In the table below, you’ll find some essential distinctions between these joints:

S.NoKnuckle jointCotter Joint
01.The knuckle joint connects two rods whose axes either coincide or intersect and lie in the same plane and are subjected to axial tensile force transmission.The cotter joint connects two co-axial rods that are subjected to axial force.
02.When angular displacement is required, a knuckle joint is employed.When there is no angular displacement between two rods, a cotter joint is utilized.
03.The knuckle joint is designed to handle high-tensile loads.For minor tensile and compressive forces, cotter joints are utilized.
04.Allow for angular movement between the rods.Allowing angular movement between rods is not permitted.
05.Even when two shafts are in motion, a Knuckle joint is designed to enable certain mobility or angle between them.The cotter joint is designed to help aligned shafts rotate in the same direction.
06.There is no taper or clearance offered.Clearance and taper are included.
07.Bearing failure is a common incident.Bearing failure is not a problem
08.Part of the Knuckle Joints are the fork end, Rod end, Split pinPart of the Cotter Joints are the cotter, spigot, socket
09.A circular pin is used in the knuckle jointA rectangular pin is used in the cotter joint.
10.Used in tie bars, bicycle chain links, and all shifting mechanisms’ joints.Used to unite two rods with a pipe, and to join the piston rod to the crankshaft head in cotter foundation bolts.

Related Article- Cotter Joint: Definition, Types, Applications, Advantages, Disadvantages

Related Article- Knuckle Joint | Definition | Construction | Design | Applications and More

Related Also- Universal Joint: All you need to Know

Final Thoughts-

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