A four-point contact ball bearing has a unique ball path geometry that enables it to handle radial, thrust and moment loads simultaneously. This makes a second bearing unnecessary, simplifying designs while saving space, weight and cost. Four-point bearings are generally used in slow-speed to moderate-speed applications, or where oscillatory movement is sufficient to cause the balls to make one or more revolutions. A new white paper from Kaydon Bearings explains how four-point contact bearings work, their advantages, and design considerations when using them.