Silicon Nitride Ceramic Bearings
Silicon Nitride Ceramic Component
SKU: FWM/SN-BRG-001
- Material
- Silicon Nitride
- Size
- Custom by drawing
- MOQ
- By quotation
- Applications
- Precision Machinery
Silicon nitride bearing components for high-speed, wear-resistant, electrically insulating and precision rotating systems.
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Product Description
Silicon nitride bearings use ceramic rolling elements, or ceramic rings and rolling elements, to support rotation with low inertia and wear-resistant contact surfaces.
A hybrid bearing combines silicon nitride rolling elements with metal rings; a full ceramic bearing also uses ceramic rings. Silicon nitride's low density reduces rolling-element inertia, and its hardness and electrical insulation are useful in precision spindles, motors and other rotating equipment.
Product Features
- Low-density rolling elements to reduce inertia
- Hard rolling surfaces for wear resistance
- Electrical insulation from silicon nitride rolling elements
- High stiffness for precision rotating assemblies
Typical Applications
- Machine-tool spindles and precision rotating assemblies
- Electric motors requiring electrically insulating rolling elements
- Hybrid or full-ceramic bearing assemblies matched to the duty
95% Si₃N₄ Typical Properties
| Property | 95% Si₃N₄ | Condition / method |
|---|---|---|
| Density (g/cm³) | ≥3.2 | — |
| Young’s modulus (GPa) | 300 | — |
| Fracture toughness (MPa·m½) | 6.2 | — |
| Flexural strength (MPa) | >720 | 25°C |
| Compressive strength (MPa) | 2200 | 25°C |
| Thermal conductivity (W/(m·K)) | 15–20 | 25°C |
| Coefficient of thermal expansion (10⁻⁶/K) | 3.0–3.2 | 25–1000°C |
| Volume resistivity (Ω·cm) | >10¹⁴ | 25°C |
| Typical maximum material temperature (°C) | 1200 | — |
| Poisson’s ratio | 0.26 | — |
| Dielectric strength (kV/mm) | 16 | — |
| Relative permittivity | 8.2 | 1 MHz; 25°C |
| Dielectric loss tangent | 0.004 | 1 GHz; 25°C |
Available Forms
Representative forms are shown for selection; final geometry follows the approved drawing.
- Full ceramic bearings
- Hybrid ceramic bearings
- Custom bearing rings and rolling elements
Packaging & Shipping
Packing and shipment arrangements are selected for the confirmed component geometry and order requirements.
| Item | Details |
|---|---|
| Product protection | Protection method is selected for the component geometry, surface condition and quantity. |
| Other commercial terms | Confirmed in quotation |
| Payment terms | T/T / Western Union / PayPal; 50% advance payment, 50% balance before shipment |
| Shipping methods | Sea freight / Air freight / Door-to-door courier |
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