SIASUN SR25A-35/1.80 (SR25A-35/1.80)

Light and strong rarely sit comfortably together in heavy industry. A frame built to carry more usually weighs more, and a heavier machine asks more of its mounting, its drives and the people who install it. The SIASUN SR25A-35/1.80 (SR25A-35/1.80) approaches that compromise from the casting floor upwards. Its body is cast in aluminium alloy with techniques taken from the automotive industry, yet the arm handles a 35 kg (77.2 lbs) payload across a reach of 1803mm and returns to position with a repeatability of ±0.05mm. That balance between a lean structure and a substantial working load is the thread running through everything this robot offers.

Robots Middle East sells the SIASUN SR25A-35/1.80 and supplies it to manufacturers, integrators and research facilities across the Middle East. Robots Middle East prepares each quotation, coordinates delivery to your site and provides support once the robot is in service, so that a single, accountable partner remains with you from the first enquiry to production.

Background

SIASUN and the SR25A series

SIASUN is a robotics manufacturer whose industrial range covers articulated arms from small-payload units through to heavy-duty machines. Within that range, the SR25A series is offered in three named versions: the SR25A-12/2.01, the SR25A-25/1.80 and the SR25A-35/1.80 described on this page. The series sits within SIASUN's Small Payload family, part of the wider Industrial Robots portfolio. Each version is a distinct model, and the figures on this page belong to the SR25A-35/1.80 alone.

An upgraded iteration of the 20 kg class

SIASUN positions the SR25A-35/1.80 as an upgraded iteration of its 20 kg-class product, developed to broaden the range of applications that platform can serve. Three design choices define that upgrade. First, an upgraded power system is intended to deliver high precision, speed and stability through demanding production cycles. Second, the arm and the J4 to J6 axes follow a hollow concept, with cables routed internally rather than draped along the outside of the structure. Third, the lightweight aluminium alloy body keeps the moving mass in check while the hollow arm adds structural stiffness. An integrated wire feeder and a zero-position calibration groove at every joint complete a design clearly aimed at production work, where uptime and repeatable setup matter as much as raw capability.

Technical Specifications

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

The manufacturer has not published the robot's weight, power supply, controller, axis speeds, wrist moment and inertia, operating temperature, package contents or footprint dimensions; these are confirmed with you at quotation.

What does the hollow design change in a welding or handling cell?

On many articulated robots, the cables and hoses that feed the tool run along the outside of the arm. They swing, snag and wear as the arm moves, and the cell layout has to leave room for them. The SR25A-35/1.80 takes a different route. Its hollow arm carries the cabling internally, which minimises interference with fixtures and nearby equipment while also increasing the structural stiffness and safety of the arm. The J4 to J6 axes follow the same hollow principle, so the services that reach the tool pass through the wrist rather than around it.

The practical consequence is greater freedom in planning the cell. With less external cabling to accommodate, fixtures can sit closer, the robot can work in tighter spaces and the risk of a cable catching on the workpiece is reduced. The wide ±180° motion range of the J5 and J6 axes adds to that flexibility, allowing the tool to be oriented across a broad envelope without repositioning the part.

For arc welding in particular, the integrated wire feeder matters. Wire feeding stability has a direct bearing on weld quality, and SIASUN has integrated the feeder to improve both that stability and overall operational efficiency. Combined with the IP65 rating at the wrist, the design suits the conditions in which welding and general handling robots normally operate.

How does the SR25A-35/1.80 build on the 20 kg-class product?

The SR25A-35/1.80 is not presented as a new platform but as an evolution of an established one. The upgraded power system is the core of that evolution: it is designed to hold precision, speed and stability through intensive production cycles and to meet stringent requirements. The stated aim is to extend the application fields the 20 kg-class product could address, and the 35 kg (77.2 lbs) payload at 1803mm reach is how that aim is expressed on the specification sheet.

Serviceability has also received attention. Every joint incorporates its own zero-position calibration groove, which allows a technician to restore precise zero-position alignment with a dedicated tool. For a production line, that translates into a more predictable recovery after maintenance or a collision, and less dependence on lengthy recalibration routines.

Who is the SIASUN SR25A-35/1.80 for?

The SR25A-35/1.80 is aimed first at manufacturers running arc welding cells, where the integrated wire feeder and internal cable routing address two familiar sources of downtime. Fabricators producing steel structures, frames, brackets and automotive sub-assemblies fall naturally into this group.

It also suits system integrators who design compact or densely equipped cells. The hollow arm and wrist reduce the space that must be reserved for external dress packs, which can make layout planning simpler and allow more equipment within a given footprint.

Plants handling parts or tooling of a substantial weight will find the 35 kg (77.2 lbs) payload relevant, particularly when combined with a reach of 1803mm and repeatability of ±0.05mm. Technical colleges, training centres and research laboratories that wish to work with production-grade hardware may also consider it.

Buyers whose requirements differ in payload or reach should compare the other members of the series, the SR25A-12/2.01 and the SR25A-25/1.80; Robots Middle East will advise on the version that best matches your application.

What is the SIASUN SR25A-35/1.80 used for?

1. Arc welding: the integrated wire feeder supports stable wire delivery for MIG and MAG welding cells.
2. Material handling: moving parts between conveyors, fixtures and stations within the robot's working envelope.
3. Machine tending: loading and unloading machine tools, presses or moulding machines in repetitive cycles.
4. Assembly support: positioning components precisely for joining, fastening or fitting operations.
5. Compact cell layouts: working close to fixtures and neighbouring equipment, helped by internal cable routing.
6. Training and research: giving engineers and students hands-on experience with an industrial articulated arm.

Pricing and Availability

Robots Middle East supplies the SIASUN SR25A-35/1.80 on a quotation basis, so that the configuration, tooling and integration requirements of your project are reflected accurately in what you receive. Delivery, customs clearance and after-sales support are arranged together with your quotation. To begin, simply tell us about your application, your site and the volumes you expect to run; the quotation request form is available on this page.

Frequently Asked Questions

What payload does the SIASUN SR25A-35/1.80 handle?

The SR25A-35/1.80 has a payload of 35 kg (77.2 lbs). This figure applies to this version; the other SR25A models have their own ratings.

What are the reach and repeatability?

The robot offers a reach of 1803mm and a repeatability of ±0.05mm.

Is the robot suitable for arc welding?

Yes. It integrates a wire feeder that improves wire feeding stability and operational efficiency, and its hollow arm keeps cabling inside the structure.

What ingress protection does it have?

The wrist is rated IP65, which suits the dust and spatter typical of welding and handling cells.

Why does the hollow wrist matter?

The J4 to J6 axes follow a hollow concept, which prevents interference from external cables and makes the cell layout easier to arrange.

How is the robot recalibrated after maintenance?

Each joint has a zero-position calibration groove, allowing precise zero-position alignment with a dedicated tool.

Where can I buy the SIASUN SR25A-35/1.80 and what does it cost?

You can buy the SIASUN SR25A-35/1.80 from Robots Middle East, which supplies it across the Middle East. The cost depends on your configuration and project scope, so please request a quotation and we will prepare one for you.

Summary

The SIASUN SR25A-35/1.80 resolves the familiar tension between lightness and capability by pairing an automotive-style cast aluminium alloy body with a 35 kg (77.2 lbs) payload, an 1803mm reach and ±0.05mm repeatability. Its hollow arm and wrist keep cables out of the way, its integrated wire feeder serves welding cells directly, and its calibration grooves keep maintenance predictable. For manufacturers and integrators who want a lean yet capable articulated arm, supplied and supported by Robots Middle East, this page is the starting point.