SIASUN SR220A-220/2.66 (SR220A-220/2.66)

Weld spatter, metal dust and coolant mist are as much a part of a heavy production cell as the parts themselves, and a robot that works in that environment has to be judged as much on how well it is sealed and how stiff it stays as on what its datasheet promises. The SIASUN SR220A-220/2.66 (SR220A-220/2.66) is built with that environment in mind: a heavy-payload articulated arm that pairs a reworked, backlash-free gearbox with a sealed body and a protected wrist, so that a heavy tool can be moved quickly and placed precisely in conditions that wear lesser machines down.

Robots Middle East supplies the SIASUN SR220A-220/2.66 to manufacturers, integrators and research institutions across the Middle East. Robots Middle East prepares each quotation to the application in question, arranges delivery to the site, and remains the point of contact for technical questions and after-sales support once the robot is commissioned.

Background

SIASUN and its industrial robot range

SIASUN is a robotics manufacturer whose industrial range covers articulated robots for welding, handling and assembly across a wide spread of payload classes. Within its Industrial Robots line, the SR220A series sits among the heavy machines, and the series offers a range of load capacities and arm reaches, suited to diverse application scenarios. A notable aspect of the SR220A-220/2.66 is that its wrist is driven by a custom high-inertia motor from SIASUN's own brand, which means a key part of the drivetrain is designed in-house rather than bought in.

Positioning: heavy payload with a stiffer core

The SR220A-220/2.66 belongs to SIASUN's Large Payload family. Its defining engineering change is a forward-designed, all-new 220 five-axis backlash-free gearbox structure, which raises overall machine rigidity by 17%, and the high-rigidity structure as a whole improves rigidity by over 17%. That stiffness is combined with NURBS transition and variable-speed variable-acceleration motion planning, and with a sealed construction that protects the whole machine to IP54 and the wrist to IP67. The result is a robot positioned for cells where a heavy end-effector must move at pace without sacrificing placement accuracy.

Technical Specifications

Specifications are as published by the manufacturer and are confirmed against the datasheet at quotation.

SIASUN has not published the weight, dimensions, axis speeds, axis ranges of motion, power supply, controller model, mounting options, wrist moment and inertia ratings, operating temperature or the contents of the delivery, so these are confirmed at quotation.

What keeps the SIASUN SR220A-220/2.66 accurate under a heavy load?

A heavy-payload robot is only as accurate as its structure allows. When a large tool is carried at the end of a long arm, every source of compliance in the drivetrain shows up at the tool point as deflection, overshoot or a settling delay before the next operation can begin. Backlash in a gearbox is one of the most familiar of those sources, because it lets the output move slightly before the input takes up the load.

SIASUN's response in the SR220A-220/2.66 is the forward-designed, all-new 220 five-axis backlash-free gearbox structure, which raises overall machine rigidity by 17%. A stiffer machine holds its path more closely as it accelerates and decelerates, and that is what underpins a repeatability of ±0.06mm on a robot rated for 220 kg (485 lbs) at 2600mm of reach.

The wrist receives particular attention. Heavy tools rarely carry their mass neatly at the flange; welding guns, grippers and clamping tools often place a significant part of their mass away from the wrist centre, which increases the inertia the wrist must control. The custom high-inertia motor on the SR220A-220/2.66 increases the allowable end-effector inertia by 8%, giving tool designers more freedom in how they build the end-effector.

Speed is handled in the motion planning. NURBS transitions blend one path segment into the next smoothly rather than stopping at each point, and variable-speed variable-acceleration planning adjusts the motion profile to the move being made. Together they make operation faster and more stable, improving spot welding cycle time by over 11%. Stiffness and planning work together here: a smoother trajectory asks less of the structure, and a stiffer structure follows a faster trajectory more faithfully.

Why does the sealing of the SR220A-220/2.66 matter in a production cell?

In many heavy cells the threat to uptime is not the load but the environment. Spot welding produces spatter and fumes; machining and casting areas carry dust and coolant; washing and finishing stations bring water into the cell. Connectors and cable entries are typically where contamination finds its way in.

The SR220A-220/2.66 addresses this with a customised aviation plug sealed cover, achieving IP54 for the whole machine and IP67 for the wrist. The higher rating sits where it is needed most, since the wrist operates closest to the process and the tool. For plants in the Middle East, where fine dust is a constant presence on many shop floors, sealing of this kind is a practical consideration when planning maintenance intervals and long-term reliability.

Who is the SIASUN SR220A-220/2.66 for?

The most obvious buyer is the automotive body shop or vehicle component supplier running resistance spot welding. SIASUN's own figures for this robot centre on spot welding cycle time, and the combination of payload, stiffness and wrist inertia suits heavy welding guns on dense weld schedules.

A second group is manufacturers and system integrators building heavy handling cells: lifting large castings, forgings, panels or assemblies between machines, fixtures and conveyors, where a substantial gripper must be carried with the part. Integrators in particular benefit from the increased allowable end-effector inertia when designing custom tooling.

A third group comprises plants working in dusty or wet conditions, such as foundries, fabrication shops and building-materials producers, for whom the IP54 body and IP67 wrist are as significant as the payload rating.

Universities, technical institutes and industrial research centres that study heavy-duty automation, welding processes or motion planning form a further segment, as the robot brings recognisable industrial-scale challenges into the laboratory.

Because the SR220A series spans a range of load capacities and arm reaches, buyers whose cell layout calls for a different balance of load and reach should also compare the SIASUN SR220A-125/3.10 (SR220A-125/3.10), the other version named in this series. Robots Middle East can set the two versions side by side against your application.

What is the SIASUN SR220A-220/2.66 used for?

1. Resistance spot welding — carrying heavy welding guns through dense weld sequences on body-in-white and chassis lines.
2. Heavy material handling — moving large, heavy parts between machines, fixtures and conveyors with a substantial gripper attached.
3. Machine tending — loading and unloading presses, machining centres and other equipment with heavy workpieces.
4. Palletising and depalletising — stacking and unstacking heavy goods or multi-part layers at the end of a line.
5. Foundry and casting cells — handling castings in dusty conditions where whole-machine sealing protects the robot.
6. Research and training — studying heavy-payload motion planning, welding processes and cell design at industrial scale.

Pricing and Availability

The SIASUN SR220A-220/2.66 is supplied on quotation, because the right configuration depends on your end-effector, cell layout and application. Share the tool you intend to carry, the process and the site conditions, and Robots Middle East will prepare a quotation that reflects them. Delivery, customs clearance and technical support are arranged together with the quotation. To begin, the request form for a quotation is available on this page.

Frequently Asked Questions

What payload and reach does the SIASUN SR220A-220/2.66 offer?

The SR220A-220/2.66 is rated for a payload of 220 kg (485 lbs) and has a reach of 2600mm.

How repeatable is the SR220A-220/2.66?

The robot has a repeatability of ±0.06mm. Its backlash-free gearbox structure and higher overall rigidity support that figure under heavy loads.

What protection ratings does the robot have?

The whole machine is protected to IP54 and the wrist to IP67, achieved with a customised aviation plug sealed cover.

Is the SR220A-220/2.66 suitable for spot welding?

Yes. Spot welding is the application SIASUN highlights: its NURBS transition and variable-speed variable-acceleration motion planning improve spot welding cycle time by over 11%.

Can it carry tooling with a large offset mass?

A custom high-inertia wrist motor increases the allowable end-effector inertia by 8%. Robots Middle East reviews your tool data with you when preparing the quotation.

Are there other versions in the SR220A series?

Yes. The series offers a range of load capacities and arm reaches, and the SIASUN SR220A-125/3.10 (SR220A-125/3.10) is the other version named alongside this model.

Where can I buy the SIASUN SR220A-220/2.66 and what does it cost?

The SIASUN SR220A-220/2.66 is available from Robots Middle East across the Middle East. Its cost depends on configuration and scope, so it is provided in a tailored quotation that you can request on this page.

Summary

The SIASUN SR220A-220/2.66 is designed for the conditions heavy cells actually face: dust, spatter and coolant around the machine, and a large tool on the end of a long arm. A forward-designed backlash-free gearbox raises rigidity by over 17%, refined motion planning shortens spot welding cycles by over 11%, a custom wrist motor allows 8% more end-effector inertia, and sealing to IP54 for the body and IP67 for the wrist keeps the robot working where the process is roughest. With 220 kg (485 lbs) of payload, 2600mm of reach and ±0.06mm repeatability, it is a serious candidate for welding and heavy handling. For a quotation tailored to your cell from Robots Middle East, this page is the starting point.