Angular contact bearings were created so that a contact angle in between the races and also the balls is formed once the bearing is in use. The main design feature of angular contact bearing is usually that one, or both of the ring races have one shoulder relieved, or higher compared to other. To ensure that angular contact bearings to operate properly, they ought to be assembled which has a thrust load. This loading (or preload) results in a line of contact (or contact angle) in between the inner race, the ball and also the outer race. The preload could be constructed into the bearing or created while the bearing is placed into an assembly. The contact angle differs from 15 degree to 40 degree and it is calculated relative to a line running perpendicular to the bearing axis. Angular contact bearings are unidirectional thrust bearings which could withstand heavy thrust loads and reasonable radial loads. Important dimensions to think about when looking for angular contact bearings consist of design units, bore, outside diameters, and outer ring width. Design and style units could be either in inches or metric units. Some suppliers might identify parts in both. The bearing industry utilizes a standard number system for bearings with metric diameter bores. For bore sizes 04 or over multiply by 5 to get the bore in millimeters. If the bore is a hex go into the dimension across the flats. If the bore is tapered go into the smaller diameter. The external diameter of the bearing consists of the housing in case a housed unit, but excludes the flange if a flanged bearing. Rolling function is provided by a ball. Low friction, high speed, light to medium loading. light and general machine applications. commonly found in fans, roller blades, and under hood applications on cars etc.