SIASUN SR360A-280/3.20 (SR360A-280/3.20)

Reach and precision tend to pull against each other. The further an arm stretches, the more every joint, gear and casting must resist the bending that a heavy tool or part imposes at the wrist, and the harder it becomes to return that tool to exactly the same point, cycle after cycle. The SIASUN SR360A-280/3.20 (SR360A-280/3.20) addresses that tension directly. It carries 280 kg across a reach of 3200mm while holding a repeatability of ±0.01mm, which places it among the large payload machines intended for body shops, heavy fabrication and handling cells where a long, stiff arm is the entire point of the investment.

Robots Middle East sells the SR360A-280/3.20 and supplies it to manufacturers, system integrators and technical institutions across the Middle East. Our team prepares each quotation around the specific cell you are planning, coordinates delivery to your site and remains your point of contact for support once the robot is in production, so that a single partner answers for the arm from the first enquiry to the working line.

Background

SIASUN and its research lineage

SIASUN belongs to the China Academy of Sciences and was founded in 2000 by Qu Daokui, who is still its chief executive. That origin within a national research institution helps to explain the company's approach to industrial robotics: core components such as the motors fitted to this arm are developed by SIASUN itself rather than sourced as standard parts. The SR360A-280/3.20 belongs to the family that SIASUN groups under its large payload robots, the heavier end of its industrial range, where structural stiffness and dependable drives matter more than compactness.

Rigidity, speed and serviceability by design

SIASUN describes the SR360A-280/3.20 as combining high rigidity, high speed, easy maintenance and easy deployment, and each of those qualities is tied to a specific engineering decision. The J5 axis uses a backlash-free gearbox, which raises the overall rigidity of the arm and reduces vibration when the robot starts and stops. Self-developed high-torque motors increase spot welding rhythm by more than 10%. The robot body has no counterweight, a design choice intended to lower the failure rate by removing components that would otherwise need attention. Finally, the control cabinet supports mainstream communication protocols and reserves both expansion space and room for an external axis driver, which simplifies system integration and deployment on a production line.

Technical Specifications

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

SIASUN has not published the robot's weight, axis speeds, axis motion ranges, mounting options, power supply, controller model, wrist moment and inertia ratings, operating temperature range or package contents; Robots Middle East confirms these details with you at quotation.

What makes the SR360A-280/3.20 suited to spot welding?

Spot welding is a discipline of short, repeated movements under load. A servo gun is heavy, its cables add drag, and the robot must move it from one weld point to the next, settle, clamp and release many times on every car body or assembly. Two characteristics therefore determine productivity: how quickly the arm can travel between points, and how quickly it stops oscillating once it arrives. The SR360A-280/3.20 answers both. Its self-developed high-torque motors raise spot welding rhythm by more than 10%, while the backlash-free gearbox on the J5 axis stiffens the wrist region and reduces the vibration that would otherwise delay each weld.

Precision matters as much as pace. A repeatability of ±0.01mm means the arm returns to a programmed weld point with very tight consistency, which supports uniform weld quality across long production runs. The IP67 rating on the wrist is relevant as well, since the wrist is the part of the arm closest to spatter, coolant and the general contamination of a welding environment.

The no-counterweight body supports the same objective from a different direction. Welding lines run long shifts, and any stoppage for maintenance stops every station downstream. By lowering the failure rate, the design helps to keep the cell running, which is ultimately the measure that matters to a production manager.

How does the SR360A-280/3.20 compare with its related versions?

SIASUN offers this platform alongside related versions, including the SR360A-360/2.83 and the SR270A-270/2.70. The information available to us for this page carries figures for the SR360A-280/3.20 only, so we do not attribute any payload or reach to the related models here; their datasheets should be compared side by side before a choice is made. What can be said is that the SR360A-280/3.20 combines a 280 kg payload with a 3200mm reach, a pairing that favours applications where the arm must cover a large working envelope, such as reaching across a wide car body or a long fixture. Robots Middle East will set the relevant datasheets next to one another as part of your quotation, so that the selection is based on confirmed figures rather than assumptions.

Who is the SIASUN SR360A-280/3.20 for?

The most natural buyers are automotive body shops and their suppliers, where spot welding rhythm translates directly into output and where the long reach helps a single robot cover more weld points. Heavy fabrication workshops are a second group: manufacturers of steel structures, agricultural machinery or large enclosures that need to manipulate substantial parts or heavy tooling with repeatable accuracy.

System integrators form a third segment. For them, the control cabinet's support for mainstream protocols, its reserved expansion space and its provision for an external axis driver reduce the engineering effort needed to link the robot with positioners, tracks, conveyors and line controllers. Plant engineering teams responsible for uptime will also value the no-counterweight body and its lower failure rate.

Where a project calls for a different balance of payload and reach, the related versions deserve consideration, among them the SIASUN SR270A-270/2.70 (SR270A-270/2.70). The full range of heavy machines can be browsed in the Large Payload category, and the wider SIASUN line-up is listed under Industrial Robots.

What is the SIASUN SR360A-280/3.20 used for?

1. Spot welding: carrying heavy servo guns between weld points at an increased rhythm on body-in-white lines.
2. Heavy part handling: lifting and positioning large components that are impractical or unsafe to move by hand.
3. Machine tending: loading and unloading substantial workpieces at presses, machine tools or casting cells.
4. Large assembly: presenting heavy sub-assemblies to fixtures with consistent, repeatable positioning.
5. Palletising and transfer: moving dense loads between conveyors, stations and pallets across a wide working envelope.
6. Integrated multi-axis cells: coordinating with positioners or tracks driven from the space reserved in the control cabinet.

Pricing and Availability

Robots Middle East supplies the SR360A-280/3.20 on a quotation basis, because the right configuration depends on the tooling, the cell layout and the integration your project requires. Send us a description of the application, the parts or tools the robot will carry and the equipment it must communicate with, and we will return a quotation prepared for that brief. Delivery, customs clearance and after-sales support are arranged together with the quotation. To begin, please use the quotation request available on this page.

Frequently Asked Questions

What payload does the SR360A-280/3.20 carry?

The SR360A-280/3.20 has a payload of 280 kg (617.3 lbs). Tooling and dress packs count towards that figure, so they should be included when sizing the application.

How far can the arm reach?

The reach is 3200mm. This long reach allows the robot to cover a large working envelope from a single position.

How accurate is it?

The repeatability is ±0.01mm, so the arm returns to a programmed point with very tight consistency.

Is the wrist protected against dust and liquids?

Yes, the wrist is rated IP67. A protection rating for the rest of the body is not stated in the information we hold, and we confirm it at quotation.

Why does the robot have no counterweight?

SIASUN uses a no-counterweight body to lower the failure rate. Fewer components to service supports higher uptime on long production shifts.

Will it integrate with our existing line?

The control cabinet supports mainstream communication protocols and reserves expansion space as well as space for an external axis driver. Robots Middle East reviews your line equipment as part of the quotation.

Where can I buy the SIASUN SR360A-280/3.20 and what does it cost?

You can buy the SR360A-280/3.20 from Robots Middle East, which supplies it across the Middle East. The cost depends on the configuration and integration required, so we provide it in a tailored quotation.

Summary

A long arm is only valuable if it stays stiff and precise at the end of its reach, and that is the balance the SIASUN SR360A-280/3.20 is engineered to hold. It pairs a 280 kg payload and a 3200mm reach with ±0.01mm repeatability, and supports them with a backlash-free J5 gearbox, self-developed high-torque motors that lift spot welding rhythm by more than 10%, a no-counterweight body and a control cabinet prepared for integration. For body shops, heavy fabricators and integrators across the Middle East who need reach without sacrificing accuracy, Robots Middle East provides the quotation, delivery and support, and this page is the starting point.