HIGHE PRECISION AUTOMOTIVE TENSIONER BEARINGS Tension bearings used in automotive engine belt pulley tensioning mechanism, and manufactured with tri-lip type seal structure, high temperature resistant rubber seals, fully synthetic special grease, and high-quality bearings steel, which are characterized by high temperature, high limiting speed and long life, Suitable for automobile engines that contact with water vapor, dust, mud, and work with heat, cold or other complex conditions. APPLICATION FEATURES 1.High-speed running of bearing outer ring; 2.Temperature of operating environment above 100℃; 3.Surrounding of bearings with water vapor, dust; 4.Contact with mud frequently; 5.High rotation speed; 7.Operate of belt transmission; the rotation speed of bearings changes frequently during operation; force direction changes with belt swing; magnitude of load changes frequently--hearings have a greater impact of variable s…