What is ball bearing ?
Working principle for a ball bearing; red dots show direction of rotation.
A 4-point angular contact ball bearing
A ball bearing for skateboard wheels with a plastic cage
Wing quest’s self-aligning ball bearing
A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races.
The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least three races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other.
Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races
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Life is good. Here we are in the last couple months of summer with its warm weather, family activities, getting ready for the children.
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Here we are in the last couple months of summer with its warm weather, family activities, getting ready for the children.