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General use of rolling bearings is high carbon steel GCr15, is commonly known as the bearing steel. Else bearing carburizing steel, stainless steel, carbon impact resistance in high temperature bearing steels, bearing steel, now the latest INA bearings material is ceramic
Overall, INA bearing materials-there are six requirements
1, the rolling contact fatigue strength
2, high material purity
3, obtained by heat treatment even with high hardness
4, high wear resistance
5, has good resistance to corrosion and chemical stability
As bearing materials using chromium steel, chromium-molybdenum steel, Nickel-chromium-molybdenum steel, with permeability and charcoal quenching, keeping to the right there is a hardened layer depth from the surface. Organizations with the appropriate hardening depths, sophisticated, suitable hardness of surface and core hardness of seepage INA bearing carbon, than the use of bearings with bearing steel with excellent impact resistance, permeability and chemical composition of carbon bearing steel in General.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-27880/27820 NTN | 38.1 | 80.035 | 23.698 |
| 4T-28150/28315 NTN | 38.1 | 80 | 20.94 |