Description

They are like arranging two single row angular contact ball bearings back to back, with inner & outer ring as one piece respectively ds & cage stresses, reducing bearing life & increasing running noise. There self-aligning capability is very limited.

Pressed steel cages are generally used. For high speed precision applications with a contact angle less then 30 degree, polyamide resin cages are used. Additives in lubricating oil or aged oil or higher temperature may reduce these cage life.

Generally the maximum attainable speed of rolling bearing is dictated by the permissible operating temperature which is turn depends upon in addition to frictional heat generated with in the bearing also on surrounding parts, environment, oil viscosity, load type etc.