Representative of rolling bearings, a wide range of uses but withstanding the radial direction load and two-way axial load applicable to the high and low noise and low for the occasion with a steel dust cover or rubber seals of the sealing type of bearings with filling in advance within the modest level of the outer ring with the follow-up frame or flange bearing on housing and facilitate the installation of the maximum load for the size and standard bearings are the same, but in the outer ring with a slot, adding to the count and increase the load.