There are four types of links: rigid, flexible, fluid, and floating links.

Rigid link:- A rigid link is one that does not undergo any deformation while transmitting motion. Links in general are elastic in nature. They are considered rigid if they do not undergo appreciable deformation while transmitting motion, for example connecting rod, crank, tappet rod, etc.

Flexible link:- A flexible link is one which while transmitting motion is partly deformed in a manner not to affect the transmission of motion, for example, belts, ropes, chains, springs, etc.

Fluid link:- A fluid link is one that is deformed by having fluid in a closed vessel and the motion is transmitted through the fluid by pressure, as in the case of a hydraulic press, hydraulic jack, and fluid brake.

Floating link:- This is a link that is not connected to the frame.