Two-direction locating bearings may be self-contained or have a two-piece inner ring. They have a lower roller complement and lower roller capacity, but a much higher load capacity. They are rather complex bearings.

Full-complement Bearings use two snap rings in the non locating race to retain the rollers. They have a high load capacity, their disadvantage is low speed. The speed limitation results from the high rubbing velocity between adjacent rollers and limits the bearing to low-speed or oscillatory applications.

Double-row Bearings are used where alignment between shaft and housing is very good and high loads are to be handled at moderate speeds. The bearings are nonlocating. Another class of double-row bearings is the journal roller bearing, which has two non locating races.

 
Physical Characteristics

Although the rolling elements in cylindrical roller bearings are called "cylindrical," they are not true cylinders. True cylinders would produce stress concentrations at the ends of the roller-race contact, resulting in high wear and high sensitivity to misalignment. Instead, rollers are usually crowned or end relieved.

Application Of Cylindrical Roller Bearings

Cylindrical roller bearings are used in power generation, oilfield, mining and aggregate processing, gear drives, rolling mills, machine tools, transmissions, vibration machines and as wheel set bearings for rail vehicles.

Types of Cylindrical Roller Bearings

There are three basic types of cylindrical roller bearings:

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