6902rs 6902 Ceramic Bearing Si3N4 ABEC 3 15x28x7mm
6902 Ceramic Bearing Of Si3N4 races and balls + cage With P6/ABEC3 Precision
Description of 6902 Ceramic Bearing:
1. Si3N4 races and balls: Are made of highly purified, submicron silicon nitride powder with an alpha phase of more than 92%, and is processed after HIP (Hot Isostatic Pressure) sintering technology. So the porosity, wear resistance, crushing value and fatigue contact life have been greatly improved.
2. cage: has resistance to many kinds of acid and alkali and high temperature resistance.
Performance advantages of 6902 Ceramic Bearing:
Ceamic bearing 6902 in material of silicon nitride possesses light weight structure have good resistance to dry friction, low coefficient of linear expansion(3.3 10 -6/℃), self-lubrication, high fatigue life. They have high hardness (1580 HV5), high electrical and magnetic insulation and are wear-resistant, resistant to a variety of strong acid, strong alkali, salt corrosion (in addition to hydrofluoric acid, nitric acid). Its max work temperature can reach to about 1000 ℃, its service life is far beyond the same metal bearings several times to dozens of times, etc.
| Ceramic | Bearings | Dimension | Reference | |
| Bearings Model | Load Rating (Ref.) | Load Rating (Ref.) | Max Speed (Ref.) | Max Speed (Ref.) |
| Cr(N) | Cor(N) | Grease (rpm) | Oil (rpm) | |
| 61902CE | 3225 | 2250 | 26000 | 34100 |
Application of 6902 Ceramic Bearing:
Silicon nitride bearings are suitable for high-speed, alternating load environment, so are usually use ashigh-speed spindle, electric spindle, CNC machine tool and motorized spindle bearings.
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