What Problem Does It Solve?
The hardness of bearing rings and rolling elements is a key indicator for ensuring wear resistance and fatigue life, but the following limitations have long plagued production sites:
- Large workpieces cannot be sent for inspection: Large and extra-large bearing rings exceed the measuring range of bench-top Rockwell hardness testers. Traditional methods require destructive cutting sampling, which damages the workpiece and is inefficient.
- Insufficient accuracy of portable testing: Leeb hardness testers are portable but sensitive to surface finish, requiring calculation and being affected by many factors, making their accuracy difficult to meet bearing industry standards.
The Shenyang Tianxing PHR-4-3 Portable Rockwell Hardness Tester: It is designed based on the basic principles of Rockwell hardness testing. Using a C-frame support structure, bringing bench-top accuracy to the production site and completely solving the above problems.
Main Functions
- On-site Hardness Testing of Large Bearing Rings: Maximum opening size of 100 × 75 mm, it can clamp large rings with outer diameters exceeding 500mm and test directly on the end face or raceway without cutting samples.
- Alternative to Leeb Hardness Tester: Error ≤1.5HRC, accuracy far higher than Leeb hardness testers, low requirements for workpiece surface finish, no need for grinding to meet drawing standards, and easily recognized in international trade.
Key Parameters
| Brand / Model | Shenyang Tianxing / PHR-4-3 |
|---|---|
| Measuring Range (Opening Size) | 100 mm × 75 mm (Max Width × Max Depth) |
| Initial Test Force | 10 kgf |
| Indenter | 120° (HRC); Φ1.588 mm (HRB) |
| Indication Error | Compliant with GB/T 230.2, error ≤ ±1.5 HRC |
| Resolution | 0.5HR |
| Net Weight | Approx. 2.2 kg |
| Applicable Workpieces | Flat parts, can clamp various shaped workpieces within the C-frame |
| Applicable Standards | GB/T 230, ISO 6508, ASTM E18, ASTM E110 |
Typical Applications at Our Factory
Hardness testing of large bearing rings: Clamp the PHR-4-3 onto the end face of the bearing ring and directly measure the HRC hardness value without cutting or sampling.
Complementary to the Leeb hardness testers: Compensates for the wall-thickness limitations of Leeb hardness testers when measuring bearing rings.
Conclusion
The portable Rockwell hardness tester transforms hardness testing of large bearings from "destructive sampling and off-site inspection" to "on-site, instant testing". With its lightweight 2.2 kg design, 100 × 75 mm opening range, bench-top comparable accuracy (≤1.5 HRC), and simple, fast operation, the PHR-4-3 makes hardness testing more convenient and efficient.
Clamp it in place, test instantly, and get hardness results immediately.