... ball bearing: Suitable for precision instruments, low noise motors, automobiles, motorcycles and other machinery Deep groove ball ... , they are suitable for precision instruments, low noise motors, automobiles, motorcycles, and other common machinery, as ... lubrication CBADustproofCBAWaterproofDCBA.ExcelientB.Good C.Fair D.Poor Series:SeriesBore diameterVariant structure600010~120Z,2Z,RZ,2RZ,RS1 ...