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Bunting Bearings BU Sleeve Bearing, PTFE Composite, Metric

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Specifications for this item
Material Type
PTFE (Polytetrafluoroethylene)
Brand Name
Bunting Bearings
System of Measurement

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Key Features

  • Plain sleeve bearing for supporting radial loads
  • Steel backing with PTFE lining for strength and resistance to wear
  • PTFE lining requires no lubrication
  • Maximum load (P) value of 36,250 psi and maximum pressure velocity (PV) value of 51,000
  • Operating temperature range of -328 to 536 degrees F (-200 to 280 degrees C)

Product Description

This Bunting Bearings polytetrafluoroethylene (PTFE) composite sleeve bearing is suitable for applications with radial loads. It has a steel backing and a porous bronze intermediate layer that has been impregnated and lined with PTFE, and requires no lubrication. The bearing has a maximum load value of 36,250 psi (pounds per square inch), a maximum velocity value of 1,000 sfpm (surface feet per minute), and a maximum pressure velocity (PV) value of 51,000. It operates at temperatures from -328 to 536 degrees F (-200 to 280 degrees C). This PTFE composite sleeve bearing is for use in various applications such as automobiles, pumps, office machines, and home appliances, among others.

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.

Bunting Bearings LLC manufactures a variety of bearings that meet standards for quality assurance established by the Society of Automotive Engineers (SAE), ASTM International, and the International Organization for Standardization (ISO), among others. Founded in 1907, Bunting Bearings LLC is based in Holland, Ohio.

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