Bearings • Needle Bearings
Needle bearings use cylindrical rollers to reduce friction. They are structured with an inner race, a needle cage, needle rollers, and an outer race. Radial needle bearings are cylindrical with rollers parallel to the shaft's axis while the thrust needle bearings are flat with a radial pattern of needles. They need oil lubrication typically for high loads and speeds. Relative to its radial space, they have high load capacity but its bore diameter is limited to 10 inches. The full complement design has a full complement of needles and without a retainer. The caged needle design contains a retainer and spacing. Caged needle bearings have smaller roller parts and smaller load capacities than full-complement bearings.
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Accent is a distributor of needle roller bearings from IKO, Smith, Aetna, RBC, Torrington, SKF, Heim and others. IKO are high precision products with a low sectional height which install needle rollers as the rolling element. Smith products are engineered from high alloy steel and are case hardened for maximum longevity.
Grainger is a distributor of needle bearings from INA, including drawn cup, machined, and with inner races. There are dozens of bore sizes to choose from.