... , 24000, 23200, 22200, 22300, 23100,2410023900,etc. Ring MaterialChrome Steel ,Carbon steel,Stainless steel Tolerance gradeGB/T307.1 ... 100% L/C At Sight ApplicationHome appliances, low noise and high speed electric motors, automotive components, pumps, machinery. ... .1.Assembly2.Windage test3.Cleaning4.Rotary test5.Greasing and gland6.Noise inspection7.Appearance inspection8.Rust prevention9.Product ...