[3.760 inches Bore Diameter |  3  & 4 inches Flange OD]

[2.760 inches Bore Diameter |  5  & 8 inches Flange OD]

This Boston Gear BOSTonE Nylatron GS roll end bearing is suitable for use in conveyor applications. Roll end bearings are press fit into the end of steel tubes, converting them to conveyor rollers. This bearing is made of Nylatron GS (molybdenum disulfide filled nylon) for greater strength, rigidity, and resistance to abrasion than nylon, and requires no lubrication. It has a maximum load value of 500 psi (pounds per square inch), a maximum velocity value of 300 sfpm (surface feet per minute), and a maximum pressure velocity (PV) value of 4,000. This roll end bearing has a maximum operating temperature of 225 degrees F (107 degrees C), and is suitable for use in material handling conveyers and other applications that use tubular rollers.

Plain bearings provide low-friction sliding contact for relative motion between parts of a machine. They are the simplest type of bearing, with no rolling elements, and there are three basic types of plain bearings: radial plain bearings (also called sleeve bearings or bushings) to support rotating or reciprocating shafts, thrust bearings (also called washers) to support axial loads on shafts, and linear bearings to support and guide the motion of parts in a straight line. Flanged sleeve bearings have a flange on one end to support axial loads. Spherical plain bearings are radial bearings that allow for angular misalignment of the shaft. Plain bearings are made from durable, low-friction materials such as sintered or cast bronze alloys, plastic, or a combination of a metal shell and a plastic bearing surface. They can be lubricated externally or by a lubricant embedded in the bearing material. Plain bearings are used in automobiles, construction and mining equipment, textile manufacturing equipment, and robotics, among others.

Boston Gear manufactures gear drives, variable speed drives, clutches, and components such as sprockets and bearings. The company, founded in 1877 and headquartered in Charlotte, NC, meets International Organization for Standardization (ISO) standard 9001 for quality assurance.