Bearings • Roller Bearings
Roller bearings is a type of rolling element bearing. They use cylinders that are greater in length than the diameter. Relative to ball bearings, roller bearings have higher radial load capacity. They have low axial load capacity and higher friction. Also in comparison to ball bearings, the bearing capacity of roller bearings can decrease at a faster rate if the inner and outer races are not aligned properly. Common types of roller bearings include cylindrical, spherical, tapered, and needle. They are ideal for heavy-duty and moderate-speed functions. But cylindrical bearings have lower speed capabilities.
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The Timken Company are suppliers of roller bearings, offering single row caged cylindrical, double row cylindrical for better radial capacity, and four row cylindrical types with high radial capacity (but no thrust capacity). Timken spherical types come in one piece brass cage finger type, and two piece brass cage finger type (some with a stamped steel cage and metric sizes). Timken needle types support radial loads, offer a caged version and caged assemblies, and a heavy duty needle type with a small radial cross section. Tapered types manage both thrust and radial loads, come in single, double or four row type, used tapered rollers, and can handle high load capacities. Timken also manufactures the Fafnir line.
PSL's production offering includes more than 200 types of both standard and special roller bearings. Single row tapered designs handle both radial and axial loads. Double row tapered types are used in heavy duty applications. Four-row tapered designs are suitable for large radial forces. PSL's single row cylindrical roller bearings are suited for heavy radial loads operating under high rotational speeds. For high radial forces it is suitable to use multi-row cylindrical configurations. Crossed taper roller bearings consist of tapered rollers and can handle radial loads in high rigidity applications. Double row spherical types can simultaneously accommodate heavy radial loads and axial loads in both directions. Bearing rollers are also available.
Rotek offers their Series 5000 cross roller and Series 10000 3-row roller bearings. The Series 5000 features raceway diameters of 12" to 180" and thrust capacities from 80,000 to 2,700,000 lbs. The Series 10000 features the same raceway diameters as the Series 5000 but offers larger thrust capacities from 100,000 to 17,300,000 lbs.