What's the model for deep groove ball bearings with an inner diameter of 20 and an outer diameter of 50?
Standard product, without this size.1., according to your size, that is non-standard, or a manufacturer for customers custom-made size (belongs to non-standard)2. size error, the outer diameter may be 52, and if it is 52mm, then the model is 6304 (the old code 304)
4752 of the outer diameter
There is no deep groove ball bearing with an inner diameter of 20 and an outer diameter of 50.Because the bearing is a standard part of national standardization and universalization of the deep groove ball bearing is 60000 lead,
