Metal-Polymer Plain Bearings and Bushings


Self-lubricating metal polymer plain bearings


This composite bearing structure comprised of a steel backing for mechanical strength and a porous sintered bronze interlayer impregnated with PTFE and lead for high wear resistance and extremely low friction properties.


This structure provides the following benefits:

  • Improved energy efficiency due to low friction of PTFE-enriched overlay

  • Extended service life with a strong wear-resistant bronze layer

  • Zero maintenance as self-lubricating bearings can operate perfectly dry

  • Greater reliability with lubricant to avoid potential shaft/bearing seizure under boundary conditions

  • Compact, lightweight designs with a thin-wall bearing construction

  • Reduced noise due to no metal-to-metal contact

  • Quick, simple assembly without expensive mounting tools


Since this development, TISEN Bearing has gained years of experience in polymer processing and compositional formulations which has led to a series of self-lubricating metal-polymer bearing products optimized for greater performance.


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These advances have resulted in a range of stronger, more durable and environmentally friendly lead-free bushings and bearings that perform excellently under extreme conditions in both dry and lubricated applications.

For example, originally developed for use in high performance automotive shock absorbers and other heavy duty hydraulic applications, DP4 and bronze-backed DP4B metal-polymer bushings are now used in a wide range of both automotive and for industrial applications. 

In addition to automotive shock absorbers, TSB-1D bushing are used in braking systems; clutches; gearboxes and transmissions;  door, hood and trunk hinges; convertible tops; pedal systems; pumps; seating mechanisms; steering systems; and wiper systems.Available in wide range of standard sizes and shapes (cylindrical and flanged bushings, thrust washers and sliding plates), industrial applications include aerospace, agricultural and construction equipment; food and beverage; marine; material handling; office equipment; packaging equipment; pneumatic and hydraulic cylinders; railroad and tramways, textile machinery; and valves.


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In lubricated applications TSB-1P bushings provide superior performance low friction and resistance to wear, fatigue, flow erosion and cavitation. Typical applications include fuel injection pumps, power steering pumps, compressors, engine valve-train bearings, struts and shock absorbers, hydraulic cylinders, transmission bearings, and hydraulic pumps and motors. 


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To find out more about how TSB’s products and solutions can offer additional value to your application, contact TSB directly.