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Plain Bearings Requiring Maintenance

INA Metal-Polymer Composite Plain Bearings

INA metal-polymer composite bearings are a cost-effective alternative for many industrial and automotive applications. All bearings are lead-free and, therefore, environmentally friendly. Different innovative material combinations ensure a large variety of maintenance-free or low-maintenance materials.

Low-maintenance plain bearing material E50

(1) Sliding layer
(2) Intermediate layer
(3) Steel backing
(4) Tin layer as surface protection
(5) Lubrication pocket


Low-maintenance E50

Bearings with sliding layer E50 require initial lubrication at the start of operation. This sliding layer comprises mainly polyoxymethylene (POM), a high-molecular thermoplastic that is distinguished by low friction values as well as chemical and thermal stability.


This layer also contains inert additives. The triple layer material comprises the steel backing, the intermediate layer and the sliding layer. The steel backing has a sintered porous tin-bronze intermediate layer with pores that are filled with the sliding layer.


Technical advantages:

  • Suitable for static contact pressures up to 140 N/mm2
  • Small design envelope
  • Sliding speed of up to 2.5 m/s.

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