20x35x110mm Silicon Nitride Ball Bearing Thrust Type 51104
Silicon nitride ball Ceramic Thrust Bearing 51104 (ZrO2 Races+Si3N4 Balls+PTFE Cage)
Description of Si3N4 Ball Thrust Bearing 51104:
1. ZrO2 races: Are made by highly purified, sub-micron and after Y2O3 partially stabled zirconia powder material and are processed by AP (Atmospheric Pressure) sintering and HIP (Hot Isostatic Pressure) sintering technology.
2. Si3N4 Balls: Are made of highly purified, submicron silicon nitride powder with an alpha phase of more than 92%, and are processed by GPS (Gas Pressure) sintering and HIP (Hot Isostatic Pressure) sintering technology.
3. PTFE cage: Teflon has excellent resistance to molten metal sodium and liquid fluorine, to all kinds of acid and alkali corrosion and organic solvent,can work in +250℃ to -180℃ temperature for a long time.
Performance advantage of Si3N4 Ball Thrust Bearing 51104:
| 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) | |
| 51104CE | 11440 | 20995 | 5300 | 8000 |
Material properties of zirconia and silicon nitride:
| Material Properties | Units | HIP-Si3N4 | GPS-Si3N4 | HIP-ZrO2 |
| Density | g/cm3 | 3.27-3.29 | 3.22-3.27 | 6.05-6.09 |
| Porosity | % | 0 | 0 | 0 |
| Fledural Strength | MPa | 830 | 689 | 900 |
| Elastic Modulus | GPa | 310 | 310 | 200 |
| Hardness | HV5 | 1580 | 1450 | 1300 |
| Fracture Toughness KIC | MPa.m1/2 | 6.1 | 5.7 | 8-11 |
| Maximum Use Temperature | ℃ (℉) |
1000 (1830) |
1000 (1830) |
380 (716) |
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