The most common range of bearings in everyday use.
Rolling bearings normally comprise bearing rings, rolling elements and a cage.
Rolling elements are arranged between inner rings and outer rings with a cage, which retains the rolling elements in correct relative position, so they do not touch one another. With this structure, a smooth rolling motion is realised during operation.
Deep groove ball bearings are the most popular of all rolling bearings, available in a variety of sizes. These products, which are of simple design, robust in operation and easy to maintain can support radial loads and a certain degree of axial load in both directions. Due to their low frictional torque, deep groove ball bearings are suitable for high speeds.
Most sizes are available in pre-lubricated Metal Shielded (ZZ) or Rubber Sealed (2RS) versions, eliminating the need for greasing. Versions are also available with a Locating Snap Ring (NR), facilitating axial location. Extra small and miniature ball bearings often supplied as Open Type. Also available are Shielded/Sealed type and the Flanged Type; the latter easily positioned in the axial direction.
Many sizes are available in stainless steel, ceramic or hybrid versions.
Transpower Drives stock Metric and Imperial sizes.
Double row ball bearings are wider than single row of the same bore, but have significantly higher load carrying capacity. They are designed for high to very high speeds.
Single Row Angular Contact Ball Bearings are designed to accommodate combined loads i.e. simultaneously acting radial and axial loads. The higher the contact angle, the higher the capacity. They are suitable for applications requiring high accuracy and good high-speed performance. Since a single bearing can only carry thrust load in one direction they are usually found as a pair, unless the axial load is always in one direction. When used in high precision applications these are usually supplied as a matched pair.
Double Row Angular Contact Ball Bearings can support axial forces in both directions and high radial forces. They are particularly suitable for bearing arrangements where rigid axial guidance is required. They take up less space than a pair of single row bearings, where assembly could be difficult.
Self-Aligning Ball Bearings have two rows of balls and a common sphered raceway in the outer ring. Used principally where there is shaft deflection when the bearing is running but will also cope with initial misalignment.
Can be supplied with contact seals on both sides.
Also available taper bored to suit an adaptor sleeve, locknut and tab washer, so facilitating bearing mounting and dismounting.
Taper Roller Bearings comprise solid inner and outer rings with tapered raceways and tapered rollers with cages made from pressed steel sheet. The bearings are not self-retaining. As a result, the inner ring with the rollers can be fitted separately from the outer ring.
These bearings can support axial forces in one direction and high radial forces. They must be normally be axially adjusted against a second bearing fitted in a mirror image arrangement.
Tapered roller bearings are available in metric or inch sizes.
They are not normally sealed; they can be lubricated using oil or grease.
Spherical Roller Bearings feature a large load rating capacity and self-aligning capability. This type of bearing is suitable for low or medium speed applications that involve heavy or impact loading.
They can support axial forces in both directions and high radial forces. They are self-aligning and consequently insensitive to misalignment of the shaft relative to the housing and to shaft deflection or bending.
Spherical roller bearings are available in metric and imperial sizes.
They are also available with a tapered bore for use with an adaptor sleeve, locknut and tab washer.
Single Direction Thrust Ball Bearings can accommodate axial loads in one direction and thus locate a shaft axially in one direction. They must not be subjected to any radial load. The bearings are separable so that mounting is simple as the washers and the ball and cage assembly can be mounted separately.
Double Direction Thrust Ball Bearings can accommodate axial loads acting in both directions and can thus serve to axially locate a shaft in both directions. They must not be subject to any radial load.