... 2. ABEC1, ABEC3, ABEC5 3. Z3,Z4 Deep Groove Ball Bearings, Deep Groove Ball Bearings) is the most common rolling bearing a type. Prototype ... a lot of high-speed operation conditions, deep groove ball bearing ratio thrust ball bearing is more superiority. Part of the model ... -R24, R156, R166, R168, R188 Other non standard deep groove ball bearings, with inner size over 10mmSealZZ, Z, 2RS, RS, OPEN, ...