High-temperature resistant, bidirectional IKO THK needle roller bearings (NA6911, NA6912, NA6913) are designed for automotive gearbox applications. These bearings ensure smooth operation under extreme temperatures and bidirectional loads, enhancing gearbox durability and performance.
Reference.
[1] BEARING (device for inner and outer seating rings, rows of steel balls, etc.) - wikipedia
| Model | Inner Diameter (mm) | Outer Diameter (mm) | Width (mm) | Dynamic Load Rating (kN) | Static Load Rating (kN) | Max Temp (°C) |
|---|---|---|---|---|---|---|
| NA6911 | 55 | 72 | 17 | 32.5 | 24.8 | 220 |
| NA6912 | 60 | 80 | 18 | 38.6 | 29.3 | 230 |
| NA6913 | 65 | 85 | 19 | 42.1 | 33.7 | 240 |
Key differentiation: NA6913 series features enhanced thermal stability for continuous high-RPM applications [1].
Non-automotive uses: Industrial kiln conveyor systems, wind turbine pitch control mechanisms.
| Test Condition | NA6911 | NA6912 | NA6913 |
|---|---|---|---|
| 200°C/500hrs | 0.03mm wear | 0.02mm wear | 0.01mm wear |
| 250°C thermal shock | Structural deformation 0.12% | Deformation 0.08% | Deformation 0.05% |
Aftermarket gearbox retrofit in 40-ton mining trucks showed 18-month service life extension compared to standard bearings.
| Client | Industry | Application | Result |
|---|---|---|---|
| Shanghai Heavy Machinery Co. | Construction Equipment | Crane Rotation Mechanism | 28% reduction in downtime |
| Guangzhou EV Motors Ltd. | Electric Vehicles | Multi-speed Reduction Gearbox | Passed 100,000km endurance test |
Email engineering sketches to info@vivalr.com or call (86) 15866781826 for load analysis.
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