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Radial floating main shaft: the flexible heart of robotic end-effector grinding tools

2026-06-11 views:110

In the polishing of irregularly shaped workpieces and complex curved surfaces, rigid main shafts are prone to damaging the workpiece. The radial floating main shaft, as the core component of the robot’s end-effector polishing tool, employs a 360° radial floating design, allowing it to adapt to minute surface deformations and positional deviations of the workpiece.


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The radial compensation range is ±5°, enabling real-time absorption of errors up to 0.5 mm in size, ensuring smooth and gentle contact between the grinding tool and the workpiece. The high-rigidity structure supports high-speed operation at 3000–30000 rpm, with rotational jitter precision of ≤5μm, thereby enhancing surface smoothness to a Ra0.4μm level.


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Integrating a radial floating main shaft into a robot’s end-effector polishing tool can significantly improve polishing consistency and quality rates, reducing the need for manual intervention. It is compatible with various materials such as cast iron, aluminum alloy, and titanium alloy, and is widely used in precision polishing applications for automotive die-casting parts, aerospace blades, and 3C electronic enclosures.

The radial floating main shaft, with its characteristic of combining rigidity and flexibility, has become a crucial tool for tackling the challenges of polishing complex workpieces, driving the development of automated polishing towards higher precision and flexibility.