What Problem Does It Solve?
After quenching and tempering of bearing rolling elements and bearing rings, hardness is the core indicator for verifying wear resistance and contact fatigue life. However, production faces the following challenges:
- High inspection efficiency requirements: Mass production requires rapid and frequent hardness testing.
- High-variety and small-batch: Test conditions need to be frequently changed for rolling elements and rings of different specifications, requiring the equipment to be easy to operate and broad applicability.
The Shanghai Shidai HR150A-1 Rockwell Hardness Tester: It performs direct Rockwell hardness measurement with simple operation, stable indication, and convenient maintenance.
Main Functions
- Rolling Element Hardness Inspection: Used for hardness inspection of steel balls and rollers, rapidly measuring surface hardness using the HRC scale to ensure compliance with process requirements.
- Sampling Inspection of Hardness for Quenched Bearing Rings: After the initial surface grinding, conduct a spot check on the hardness of the bearing rings to verify if it meets the specifications.
Key Parameters
| Brand / Model | Shanghai Shidai / HR150A-1 |
|---|---|
| Measurement Scale | Rockwell Hardness: HRC |
| Test Force | Preliminary test force: 98.1 N (10 kgf) Total test force: 1471 N (150 kgf) |
| Hardness Resolution | 0.5HR |
| Indication Error | Compliant with GB/T 230.2 and JJG 112 standards: ≤ ±1.0 HR |
| Repeatability | ≤0.8HR |
| Max. Test Height | 200mm |
| Distance from the Center of The Press Head to Machine Wall | 160mm |
| Typical Applications | Rolling elements (steel balls, rollers) hardness, bearing ring hardness |
| Standards | GB/T 230.1, ISO 6508, ASTM E18 |
Environmental Requirements: Temperature 10°C–35°C, humidity ≤ 80%. The specimen surface shall be clean, flat, and free of oil stains; with thickness ≥ 10 times the indentation depth.
Typical Applications at Our Factory
Bearing ring hardness inspection: Hardness testing of bearing rings after heat treatment.
Rolling element re-inspection: Hardness re-inspection of rolling elements supplied by suppliers.
Conclusion
The Rockwell hardness tester serves as the “Sentinel” of bearing heat-treatment quality control. With simple operation and direct reading capability, the Shanghai Shidai HR150A-1 ensures reliable intrinsic quality of bearings.
Hardness represents strength, and inspection guarantees quality.