Narrow Thin Section Single Row Radial Ball Bearings with Shielded-Sealed Closures, Pre-Lubricated with Grease or Light Oil, these type Radial Ball Bearings are Excellent In High Speed applications but are very low in Load capacity.
Thin Section Ball Bearings were developed for applications where space limitations are of the utmost importance. As the name implies, the difference between the inside and outside diameters of the rings has been minimized or thinned out. Of course this comes at a price by compromising load capacities. However, these bearings can still accommodate a relatively light radial thrust or combined loads.