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	Partner with EIC Industry Group where we make offshore production simple. Bearing Basics There are many types of bearings each with a diffrent purpose. Below you will find a small sample and basic information about some of the diffrent types of bearings that are supplied by EIC Industry Group. Ball Bearings Ball bearings use spheres instead of cylinders. Clever use of surface tension allows balls of high accuracy to be made much more cheaply than comparable cylinders. Ball bearings can support both radial (perpendicular to the shaft) and axial loads (parallel to the shaft). For lightly-loaded bearings, balls offer lower friction than rollers. Ball bearings can operate when the bearing races are misaligned. Roller Bearings Common roller bearings use cylinders of slightly greater length than diameter. Roller bearings typically have higher radial load capacity than ball bearings, but a low axial capacity and higher friction under axial loads. If the inner and outer races are misaligned, the bearing capacity often drops quickly compared to either a ball bearing or a spherical roller bearing. Deep Groove Radial Bearings A deep-groove radial bearing is one in which the race dimensions are close to the dimensions of the balls that run in it. Deep-groove bearings have higher load ratings for their size than shallow-groove , but are also less tolerant of misalignment of the inner and outer races. A misaligned shallow-groove bearing may support a larger load than a similar deep-groove bearing with similar misalignment. Needle Bearings Needle bearings provide high radial load capacity in limited diametral space applications. Drawn cup full complement bearings with a maximum compliment of rollers for highest load capacity in mimnimum space. Tapered Roller Bearings Tapered roller bearings use conical rollers that run on conical races. Most roller bearings only take radial loads, but tapered roller bearings support both radial and axial loads, and generally can carry higher loads than ball bearings due to greater contact area. Taper roller bearings are used, for example, as the wheel bearings of most cars, trucks, buses, and so on. The downsides to this bearing is that due to manufacturing complexities, tapered roller bearings are usually more expensive than ball bearings; and additionally under heavy loads the tapered roller is like a wedge and bearing loads tend to try to eject the roller; the force from the collar which keeps the roller in the bearing adds to bearing friction compared to ball bearings. Spherical Roller Bearings Designed for heavy radial loads and misallignment conditions. self-aligning features allow considerable deflection and angular misallignment without appreciablereduction in rated capacity. Cylindrical Roller Bearings Cylindrical roller bearings are used on horizontal motors where high radial loads are present. Although equivalent in size to conrad ball bearings, cylindrical bearings have a lower speed limit and are only available as open type bearings. These bearings are not available for direct connected motors, and are provided upon special order only on motors with an overhung load. Thrust Bearings Thrust ball bearings support an axial load, typically to support a vertical shaft against gravitational loads. Spherical, conical or cylindrical rollers are used; and non rolling element bearings such as hydrostatic or magnetic bearings see some use where particularly heavy loads or low friction is needed. Angular Contact Bearings Angular contact ball bearings are particularly suitable for carrying combined axial and radial loads. They also can carry pure axial load and operate at higher speeds. Self-Aligning Bearings Double row self-aligning ball bearings have a sphered raceway in the outerring and a double raceway in the inner ring. ideal for applications where misalignment can arise from errors in mounting or from shaft deflection. Mounted Bearing Units A wide range of mounted units such as pillow blocks or flanged units with inserted bearings either metric or inch sizes.
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