We control bearings’ quality from steel, spare parts, heat treatment, grinding, assembly to finished products on full process. Besides that we use designated raw material.
1:Sampling inspect raw material;
2:Full process inspect forging parts .；
3:Fully inspect raceway of turning parts ；
4:Fully inspect appearance dimension of turning parts ；
5:Heat treatment in-process inspection by batch；
6:Fully inspect grinding dimension in-process ;
7:Fully inspect super-finished raceway；
8:Sampling inspect steel balls, cages,seals, grease by batch；
9:Fully inspect dimension before assembly;
10:Fully inspect clearance,noise of finished products in process;
11:Sampling inspect finished products warehouse- out by batch.;
12: Continuous cooling grinding and ultrasonic cleaning on full process：（sampling inspection)
We give quality guarantee of 1 year under normal working conditions. Only if it is failed caused by bearing quality in a year, WWI would like to replace the failed bearing with new bearing one to one.