Characterized by outer ring raceway were spherical shape, with auto-Mind, compensation can be different and heart-axis deflection caused by the error, but inside, the outer ring relative inclination of not more than 3 degrees.
With the dust cover and seal with deep groove ball bearings when the assembly has been filled amount of grease, the heat should not be pre-installed do not have to clean, do not need to use lubrication, adapt to the operating temperature -30 degree to +120 degree of Between.
Applicable to precision instruments, low electrical noise, cars, motorcycles and general machinery, machine-building industry is the most widely used in a class of bearings.