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1. Forging: forging process generated through burning, overheating, within fragmented into carbide network will reduce the toughness and strength of the ferrule. It must always be strictly control the processing temperature cycle heating and forging after heat conditions (such as spray cooling), and so on, especially the larger species ferrule final forging temperature above 700 ℃, shall not be piled placed.
Treatment: close monitoring of heat treatment equipment is an important task of the workshop.
The reliability of the monitoring equipment. Instrument, thermocouple temperature control appliances should be closely monitored to ensure accurate and reliable measurement data; excessive error must be promptly replaced prohibited ill run.
3 the grinding step of monitoring. Finished bearing rings are not allowed to have the grinding burn grinding cracks exist, in particular, the degree of the mating surfaces of the inner ring screwdriver no burns. Full inspection should be carried out in the ferrule if pickling excised burn products, severe burns can not repair or rework unqualified should be scrapped, and does not allow the grinding burn the ferrule into the assembly process.
Identity management, steel storage before to ferrule grinding, each process must be strictly managed, strictly distinguish GCr15 and GCr15SiMn different materials materials and products.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7921A5TYNP5 NSK | 105 | 145 | 20 |
| 7921CTYNP5 NSK | 105 | 145 | 20 |