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0322
HaoRui
0322
Si3N4 ring at the contact surface, steel body for structure - balanced cost and performance
Running surface ground concentric to the bore after fitting
Depending on design, ceramic rings replaceable without scrapping the steel body
Steel reinforcement supports loads beyond full-ceramic wheel limits
Existing wheel designs can be converted to hybrid versions
Interference fit selected per speed, temperature and load
Wire-drawing machines
Tube welding lines
Conveyor guide stations
| Property | Data | Unit |
|---|---|---|
| Color | Black / Grey | - |
| Density | 3.2 | g/cm³ |
| Bending strength | 750 | MPa |
| Compressive strength | 3,800 | MPa |
| Elastic modulus | 290 | GPa |
| Fracture toughness | 7 | MPa·m1/2 |
| Weber coefficient | 15 | m |
| Vickers hardness | 1,700 | HV0.5 |
| Coefficient of linear thermal expansion | 2 | 10⁻⁶ K⁻¹ |
| Thermal conductivity | 20 | W/mK |
| Thermal shock resistance (water quench) | 750 | ΔT °C |
| Max working temperature | 1,300 | °C |
| Volume resistance at 20 °C | >10¹⁴ | Ω·cm |
| Dielectric strength | 10 ×10⁶ | V/m |
Laboratory test data of the ceramic insert material (silicon nitride). Steel body grade and fit are selected per application. Tolerances, surface finish and part-specific dimensions are made to your drawing.
Send a drawing (STEP / DXF / PDF) or a sample - we quote from either.
Steel body grade, ceramic ring width and fit class selected per your operating conditions.
Tolerance: ±0.01 mm typical, down to ±0.005 mm on critical dimensions.
Finishing: ground after assembly for running-surface concentricity.
Prototype and small batch orders accepted; production quantities supplied with inspection report on request.
