FD-20 flexible ball bearings
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FD-20 flexible ball bearings
Metric Dimensions (mm)
| Bore d | 35.56 | mm | Bearing inner bore |
| Outer Dia. D | 49.073 | mm | Bearing outer diameter |
| Width B | 5.2 | mm | Bearing width |
Structural Dimensions (mm)
| C‑outer | 5.2 | mm | Outer ring width |
| Ball Diameter | 4.763 | mm | Rolling element ball diameter |
| Ball Quantity | 23 | Pc. | Quantity of rolling elements |
| Max Radial Deformation | 0.3 | mm | Maximum radial deformation |
Radial Load (KN)
| Dynamic Load Cr | 9.93 | KN | Basic dynamic radial load rating |
| Static Load C0r | 8.36 | KN | Basic static radial load rating |
Speed & Torque
| Input Speed | 3000 | rpm | Input rotational speed |
| Output Torque | 30 | N·m | Output torque |
FD‑20 FD‑series modified flexible ball bearing is custom‑adapted for medium‑size special harmonic reducers. Optimized thin‑wall balances deformation flexibility and fatigue‑resistance. Runs stable under cyclic alternating‑stress‑load, fits modified‑spec robot joints and special‑purpose precision harmonic‑driving devices.
Flexible ball bearings feature thin-walled flexible rings that undergo controlled elastic deformation during operation, enabling precise motion transmission through wave generator assemblies. Available in standard, ultra-thin, and high-fatigue designs, with bore diameters ranging from 20mm to 300mm. These bearings deliver high torsional stiffness, zero backlash, and exceptional positional accuracy, making them ideal for harmonic drive reducers, robotics joints, aerospace actuators, and precision positioning systems.
