Silicon Nitride Bearing Rollers
Silicon Nitride is an ideal material for bearings. Silicon nitride bearing rollers have good wear and corrosion resistance, and great mechanical strength under high temperature.
Silicon Nitride Bearing Rollers, Si3N4 Ceramic Bearing Roller
Silicon nitride bearing rollers are an ideal alternative to traditional metal rollers, especially in applications that require extreme performance and durability. Their unique material properties such as high strength, wear resistance, corrosion resistance, and heat resistance enable them to perform well in high-speed, high-load, and high-temperature environments. These bearing rollers significantly improve the efficiency and reliability of the overall system by reducing energy consumption and extending the service life of equipment, meeting the pursuit and demand of modern industry for high-performance materials.
The sizes of ceramic rollers range from 0.8mm to 110mm, and their application areas include dental drill bearings of about 1mm; insulating bearings for new energy vehicle motors and machine tool spindle bearings of about 10mm; and insulating bearings for wind power generation of about 50.8mm.
Performance of Silicon Nitride Bearing Rollers
| item | Unit | Si3N4 |
| Physical Property | ||
| Color | \ | Gray Black |
| Density | g/cm3 | >3.2 |
| Mechanical properties | ||
| Rockwell hardness | HRA90 | |
| Vickers hardness (Hv50) | HV0.5 | >1550 |
| Elastic modulus (20℃) | Gpa | 290 |
| Bending strength(20℃) | Mpa | >600 |
| Compressive strength (20℃) | Mpa | 2500 |
| Fracture toughness (20℃) | Mpam1/2 | >6.0 |
| Thermal properties | ||
| Thermal conductivity | W/(m·K) | 15-20 |
| Coefficient of thermal expansion（20℃-1000℃） | 10-6K-1 | >3.1 |
| Thermal shock stability | △T℃ | 500 |
| Specific heat capacity | KJ/kg.K | 700 |
| Maximum operating temperature（in air） | ℃ | 1200 |
| Electrical properties | ||
| Dielectric strength (insulation strength) | KV/mm | 1 |
| Volume resistance (20℃) | Ω.cm | 10^12 |
* Tests under room temperature environment;
* The above information is offered for comparison only. Exact properties will vary depending on the manufacturing method.
Typical properties of silicon nitride ceramics
-High strength over a wide temperature range
-High fracture toughness
-High hardness
-Outstanding wear resistance
-Low thermal expansion and high thermal conductivity
-Good thermal shock resistance
-Good resistance to chemical and oxidation
Send inquiries to sales@edge-techind.com for more information or any questions.
Packing
As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our silicon nitride bearing rollers are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for Si3N4 products, vacuum packing is also engaged for some of the parts.
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