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This SKF double-row self-aligning ball bearing is double-sealed, and has an optimized internal design, cylindrical bore, reinforced polyamide cage, and normal clearance rating. It is suitable for applications supporting moderate radial loads and moderate to low thrust loads. This bearing has concave sphered housing rings to compensate for static angular misalignments between the shaft and housing in applications subject to shaft deflections or mounting errors. Because this bearing type has the lowest operational friction of all rolling bearings, it runs cool at high speeds. The bearing is made of low-alloy, through-hardened chromium steel for durability and resistance to deformity under heavy loads. Due to its optimized internal design, an SKF bearing with an E suffix has a higher load rating than a standard SKF bearing of comparable size. This bearing has a straight bore for fitting on a conventional cylindrical shaft. Sheet-steel reinforced acrylonitrile-butadiene (NBR) rubber seals on both sides of the bearing keep out contaminants such as dirt and grime and hold in lubricant applied at manufacture. The permissible operating temperature range of NBR is from -40 to 120 degrees C (-40 to 250 degrees F). This bearing has an injection molded snap-type cage made of polyamide 66 to prevent the balls from coming into contact with each other during use, reducing friction, vibration, and noise. This cage type can be used at operating temperatures up to 120 degrees C (250 degrees F). The bearing has a normal radial internal clearance designation, making it suitable for applications where the load and speeds do not result in thermal expansion. This clearance provides latitude for self-realignment and compensates for static and dynamic alignment errors. Additionally, the bearing is manufactured to normal tolerances in accordance with International Organization for Standardization (ISO) 492:2002 specifications. This self-aligning ball bearing is for use