Four Types Of Ball Bearing

What is ball bearings?

Ball bearings are used to provide smooth, low friction movement in rotating applications. Ball bearings can provide high performance and long life to transmit load from ball to inner race. Because of the spherical shape of the sphere, contact between the inner ring race and the outer race is minimized and it can rotate smoothly.

A disadvantage of ball bearings is that if too much pressure is exerted on the outer ring, the ball will flatten over time leading to the final breakage. Periodically monitoring the load rating and other parameters is very important.

Applications

Special applications for bearings include aerospace, military, instrument or miniature, airframe or aircraft control, agriculture, spindle or super

They consist of inner rings, outer rings, balls, and cages that occasionally contain and separate balls.

Angular contact

Angular Contact Ball Bearings are designed so that contact angles between the race and the balls are formed when the bearings are in use. The main design feature of this type of ball bearing is that one or both or one of the ring races has a higher shoulder than the other.

For these bearings to function properly, it is necessary to assemble with thrust load. This load (or preload) creates a contact line (or contact angle) between the inner ring, ball and outer ring.

Preload can be built into the bearing and is generated when the bearing is inserted into the assembly. The contact angle varies from 15 ° to 40 ° and is measured against a line running perpendicular to the bearing axis. Angular Contact Bearings are unidirectional thrust bearings that can withstand heavy thrust loads and moderate radial loads.

Thrust ball bearings

Thrust ball bearings are designed for pure thrust loading. These bearings can handle little or no radial load. The rolling element may be a ball, a needle, or a roller. Sleeve rings or turntable bearings can include axial, radial and moment

• The bearing with oil lubrication is higher than the rate speed for a bearing running with grease lubrication.

• Dynamic axial or thrust load is the calculated constant axial load. A group of identical bearings with a fixed outer ring can theoretically withstand the rated life of one million revolutions of the inner ring.

• The dynamic radial load is the calculated constant radial load and a group of identical bearings with stationary outer rings can theoretically withstand the rated life of one million revolutions of the inner ring.

Materials

• Special materials and plating options to consider for ball bearings include ceramic balls, plastics, plating, stainless steel and ceramic races.

• The ball bearing has a Rockwell minimum rating of 58 Rc and is mainly made of penetrating hardened material. 440C stainless steel and SAE 52100 steel are the most common materials for track and ball design but are not suitable for operating temperatures or friction temperatures above 350 ° F. The form of molybdenum steel is 1000 °