2 Answers

Milan Jaros · Answer 1 · 2023-03-05T20:46:48+0000

bearings reduce friction by means of rolling motion (reduces friction more than the « plain bearing »). sliding motion allows a greater decrease in the amount of energy consumption during rotation.

Motti Shneor · Answer 2 · 2023-03-08T22:08:02+0000

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Bearings are constrained elements used to reduce the friction of certain moving parts in a machine or device.
This is done by replacing sliding friction with rolling friction.
Bearings are used to provide better linear motion or rotation around a fixed axis.
Roller bearings are typically cylinders similar to free rollers, except that they are constrained in their motion.
Ball bearings are spheres that are held in a track.

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