... ,N,NR bearing 3.material:Chrome steel 4.less coefficient of friction 5.wide varieties 1.6000, 6200, 6300, 6400, 6800 ... , 6900 and 16000 series2.inner packing:plastic bag,tube in carton3.less coefficient of friction, high limiting speed,4.large size range ... , motorcycles, and other common machinery, as a widely used type of bearings in machinery industry6.Deep groove ball bearings mainly take radial load ...