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[levent123456]

Hello everyone,

I analyzed a ball bearing and roller bearing.I have to explain boundary conditions for my report so can someone help me about that?

1)Why we appl?ed fixed support?

2) Why we applied rotational velocity for inner ring?

3) Why we applied force fro inner ring ?

4) What is the difference between force and load bearing ?

Thank you so much.

[Chinmay]

 Hi,

Bearings are used for relative motion between two bodies (rotational relative motion), thus one body is supposed to be stationary while other one must be rotating. As shown in your picture, there are two rings i.e. outer ring and inner ring. In most of the cases the outer ring is supposed to be stationary (its mounted inside a body that is why its fixed support) and a shaft which is press fitted into the inner ring rotates at some angular velocity (rotational velocity). In order to produce a rotational motion we need to apply Torque to the body (which is either provided by a motor or a gear assembly), in this case I am assuming it's shaft The shaft is generally mounted on two bearings, one at each end. Various gears are mounted on the shaft which produce tangential as well as constant radial force on the shaft which is transferred to the bearings (this is that constant force). Load bearing is the capacity of bearing to sustain particular load (radial or axial) till its failure.

[levent123456]

Thank you so much

[levent123456]

in some articles they applied load bearing to roller bearing's inner ring isntead of applying force.Is there any reason for that?

[Chinmay]

Hi,

No problem, happy to help.

No. Every bearing has load bearing capacity irrespective of type of bearing while the force value totally depends on what is mounted on the shaft supported by the bearings.

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