Silicon Nitride Ceramic Ball Bearings Miniature Deep Groove 627 626
Si3N4/ZrO2/SSiC Miniature Deep Groove Balls Bearings Of 630 Series Model
Why choose us:
At present, our company has abilities to produce fast all models of ceramic miniature ceramic bearings in material of silicon nitride, zirconium oxide or silicon carbide. Ceramic Bearing are anti strong acid, strong alkali,salt and other corrosive media erosion, high temperature resistance, wear resistance, light structure, high speed limit, low noise, electricity insulation, the dimension keep stable under high temperature, smaller startup torque, keep working under bad lubricant condition, having longer using lifespan, and common metal incomparable advantages. Our company has our own material recipe and abundant production experiences, welcome your inquiry.
Material properties of our ceramic material:
All th data is based on our own experiments.
| Material Properties | Units | SSiC | HIP-Si3N4 | GPS-Si3N4 | HIP-ZrO2 |
| Density | g/cm3 | 3.15-3.18 | 3.27-3.29 | 3.22-3.27 | 6.05-6.09 |
| Porosity | % | 0 | 0 | 0 | 0 |
| Fledural Strength | MPa | 550 | 830 | 689 | 900 |
| Elastic Modulus | GPa | 410 | 310 | 310 | 200 |
| Hardness | HV5 | 2800 | 1580 | 1450 | 1300 |
| Fracture Toughness KIC | MPa.m1/2 | 4.6 | 6.1 | 5.7 | 8-11 |
| Maximum Use Temperature | ℃ (℉) |
1650 (3000) |
1000 (1830) |
1000 (1830) |
380 (716) |
Reference data of 630 series Miniature Ceramic Deep Groove Balls Bearings:
| Bearings model | Form size d (mm) |
Form size D (mm) |
Form size B (mm) |
Load Cr (N) |
Load Cor (N) |
Max.Speed Grease (rpm) |
Max. Speed Oil (rpm) |
| 634CE | 4 | 16 | 5 | 1179 | 523 | 36000 | 43000 |
| 635CE | 5 | 19 | 6 | 2056 | 896 | 32000 | 40000 |
| 636CE | 6 | 22 | 7 | 2930 | 1423 | 30000 | 36000 |
| 637CE | 7 | 26 | 9 | 4015 | 1983 | 28000 | 34000 |
| 638CE | 8 | 28 | 9 | 4015 | 1983 | 28000 | 34000 |
| 639CE | 9 | 30 | 10 | 4100 | 2080 | 24000 | 30000 |
Products picture of 630 series Miniature Ceramic Deep Groove Balls Bearings:
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