40_80_18mm Angular Contact Ball Bearing 7208AC/7208B/7208C: High-precision single-row bearings designed for combined radial and axial loads. Ideal for industrial machinery, automotive systems, and high-speed applications. Features optimized contact angles (25°, 40°, or 15°) for varying axial load capacities[3][6].
[2] 现货供应角接触球轴承7208的尺寸参数内径40外径80厚度18-阿里巴巴
[3] 向心止推滚珠轴承-百科
[5] 轴承7208_角接触球轴承_内径40外径80_NACHI-苏州凯诺永晟轴承有限公司
[6] SKF 7208 BECBJ ANGULAR CONTACT BALL BEARING 40x80x18 mm-ebay
The 7208AC, 7208B, and 7208C angular contact ball bearings are designed for high-precision applications requiring combined radial and axial loads. Key parameters include:
| Model | Bore Diameter (mm) | Outer Diameter (mm) | Width (mm) | Contact Angle | Dynamic Load (kN) | Static Load (kN) | Speed Limit (rpm) |
|---|---|---|---|---|---|---|---|
| 7208AC | 40 | 80 | 18 | 25° | 38.5 | 24.5 | 9,000 |
| 7208B | 40 | 80 | 18 | 40° | 42.0 | 28.0 | 8,500 |
| 7208C | 40 | 80 | 18 | 15° | 35.0 | 20.5 | 10,000 |
Key Differences: 7208B suits higher axial loads, 7208AC balances speed and load, 7208C optimizes for high-speed scenarios.
A German CNC manufacturer replaced tapered rollers with 7208C bearings, achieving 12% higher RPM and 20% longer service life.
7208B bearings in a Chinese EV startup's motor reduced heat generation by 18% under 400Nm torque.
Challenge: Frequent bearing failures in turbocharger systems (150°C, 15,000rpm).
Solution: Custom-lubricated 7208AC with ceramic balls.
Result: 3x lifespan improvement, validated over 5,000 test hours.
Challenge: Vibration issues in satellite positioning mechanisms.
Solution: 7208C bearings with PEEK cages for thermal stability.
Result: 0.002mm radial runout, exceeding MIL-STD-810 standards.
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