The SIASUN SR220A-220/2.66 is a six-axis heavy-payload industrial robot rated for a 220 kg payload across a 2,600 mm reach, with repeatability of ±0.06 mm. The structure is engineered for stiffness: a forward-designed, backlash-free five-axis gearbox raises overall machine rigidity by 17%, while a custom high-inertia motor from SIASUN's own brand strengthens wrist torque performance and increases the allowable end-effector inertia by 8%. Motion quality matches the mechanics — NURBS trajectory transitions combined with variable-speed, variable-acceleration planning produce smoother, faster movement and improve spot-welding cycle times by more than 11%. Sealed covers with customized aviation plugs protect the whole machine to IP54 and the wrist to IP67.

The SR220A-220/2.66 is built for heavy manufacturing duty, covering material handling, assembly, vision inspection, machine loading and unloading, and spot welding. It belongs to a SIASUN series offered in a range of load capacities and arm reaches, allowing production cells to standardize on a common platform. SIASUN case studies for the platform include automotive welding assembly lines, LCD TV manufacturing, automated carton palletizing, container-pallet flexible welding workstations, and intelligent welding systems for shipbuilding and engineering machinery — a strong fit for automotive plants, metal fabrication, and general heavy industry.