Precision Lightweight Robot Swing Arm

This custom long aluminum connecting arm is processed by multi-axis CNC milling. It adopts an elongated integrated structure with multiple recessed cavities, through holes, counterbore holes and threaded holes distributed on the surface. The hollow pocket design effectively reduces the overall weight while maintaining sufficient structural rigidity, realizing lightweight optimization.
During machining, we strictly control the straightness, parallelism, hole position tolerance and surface flatness of the whole arm. All pockets, mounting holes and avoiding slots are completed in one clamping to reduce cumulative positioning error. Stable dimensional accuracy ensures smooth motion and reliable repeated positioning during high-speed reciprocating movement.
6061, 6063 and 7075 aluminum alloy are available for selection. 7075 aluminum is preferred for scenarios with higher strength requirements. Multiple surface treatments are optional, including anodizing, hard anodizing, sandblasting and polishing. Aluminum alloy features low density, high specific strength and good dynamic response, which perfectly fits the lightweight design of motion mechanisms.
This lightweight aluminum swing arm is widely used in industrial robot manipulators, automated pick-and-place modules, linear motion units, packaging machinery, testing jigs and sorting equipment. It serves as a key moving connecting part for transmission and displacement execution.