Difference between ball and roller?

Replies

• 

  mechky

  Is it about bearings?
• 

  Siddhant Mukherjee

  this is quite simple a ball is a sphere while a roller is a cylinder. both can roll: a ball makes point contact while a roller maks line contact ideally. Speaking of bearings, you can easily visualize and differentiate a ball bearing with a roller bearing by seeing the rolling object in it. generally roller bearings are used in heavy loading conditions to reduce the stresses developed in the bearing.
• 

  The myth buster

  type of contact explains the difference..ball has a point contact whereas roller has a line contact..A ball is a sphere whereas a roller is usually a cylinder or a frustum(a tapered roller)..!!
• 

  zaveri

  maybe this question is about the types of bearings.
  
  it has already been discussed about the type of contacts, balls and rollers , make with flat surfaces.
  
  another point is that balls can easily change their direction of rolling. but a roller on the other hand which is cylindrical (and makes line contact) cannot do so that easily.