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

The family code reads SR25A, yet the arm on this page is rated for 35 kg (77.2 lbs). In SIASUN's range, the platform designation and the payload tell two different stories. The SIASUN SR25A-35-1.80 (SR25A-35/1.80) takes a design that began in the 20 kg class and asks more of it: heavier tooling, a reach of 1803mm and a repeatability of ±0.05mm. A hollow wrist keeps cables and hoses clear of the work, so a single installation can carry a welding torch or a grinding head without the dress pack becoming the limiting factor.

Robots Europa, based in Dublin, supplies the SR25A-35/1.80 to manufacturers, system integrators and research facilities across the European Union and the DACH region. We prepare each quotation around the intended cell, arrange delivery to the installation site and remain your point of contact for technical support once the robot is in production.

Background

SIASUN and its industrial robot lineage

SIASUN is a Chinese robotics and automation manufacturer whose roots lie in national research in industrial automation. Its catalogue spans mobile robots, collaborative arms and a broad series of articulated industrial robots. That series ranges from compact arms for light assembly to heavy-duty machines for automotive body work. The SR designation covers these articulated robots, and the figures in each model code broadly identify the variant within a family. That convention is useful when comparing the SR25A-35/1.80 with its siblings in the same family. You will find the wider family in our Small Payload category and the complete line-up under Industrial Robots.

An upgraded 20 kg-class platform

SIASUN describes the SR25A-35/1.80 as an upgraded iteration of its 20 kg-class product, developed to widen the range of applications the platform can serve. The upgrade rests on several design choices. The structure is produced by a special casting process using automotive engine-grade aluminium alloy, which keeps the arm light for the load it handles. The J4 to J6 axes follow a hollow concept that prevents interference and simplifies cell layout. J5 and J6 each offer a motion range of ±180°. A wire feeder is integrated into the arm to improve feeding stability and operational efficiency in welding. Each joint carries a zero-position calibration groove, so that precise zero alignment can be restored with a dedicated tool.

Technical Specifications

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

The manufacturer has not published the robot weight, the power supply, the controller model, the axis speeds, the operating temperature, the mounting dimensions, the scope of delivery or the communication interfaces; Robots Europa confirms these with your quotation.

What does the SR25A-35/1.80 add over the 20 kg-class platform?

The most visible change is the load. A platform conceived for the 20 kg class is offered here with a 35 kg payload. That leaves room for heavier end-of-arm tooling, for grippers that carry a part together with its fixture, or for a process tool with sensors and a dress pack mounted alongside. For integrators this matters: tooling mass is often underestimated at the concept stage, and a robot with margin is easier to commission than one working at its limit.

The load is matched by precision and reach. A repeatability of ±0.05mm suits weld seams and finishing paths that must be revisited part after part. The 1803mm reach lets one robot serve a fixture, a positioner or a pair of stations from a single base position. The cast aluminium alloy structure keeps the moving mass in proportion, and the calibration groove on every joint means that zero positions can be re-established after maintenance without a lengthy recalibration exercise.

SIASUN also offers the SR25A-35/1.80 as a kit system for grinding. This configuration pairs the arm with a single-head force-controlled tool for light-duty applications. The arm can therefore be specified for welding or for surface finishing from the same model.

How does the hollow wrist help in welding and grinding cells?

In process applications the robot rarely fails on payload or reach. It fails on what hangs off the wrist. External cables and hoses snag on fixtures, wear against the arm and restrict the orientations the programmer can use. The SR25A-35/1.80 routes through hollow J4 to J6 axes, which prevents this interference and leaves the cell designer more freedom in placing clamps, positioners and safety guarding.

The ±180° range on J5 and J6 works in the same direction. It gives the torch or grinding head the wrist movement needed to reach awkward joints and contoured surfaces without reconfiguring the whole arm. With the wire feeder integrated, the feeding path in a welding cell stays short and stable, which supports consistent wire delivery over long shifts. IP65 protection at the wrist addresses the dust, spatter and coolant mist typical of these environments.

Who is the SIASUN SR25A-35/1.80 for?

The first group is welding integrators and fabricators who need a robot that can carry a full torch package with margin and keep a stable wire feed. The integrated feeder and hollow wrist were designed with exactly this work in mind. The second group is manufacturers of cast and machined components who want to automate deburring or light grinding. For them, the kit system with its force-controlled single-head tool offers a defined starting point rather than a blank sheet.

A third group is production engineers in general handling, palletising of mid-weight parts, or loading and unloading of machine tools. The 35 kg payload covers a gripper and workpiece that would overload a smaller arm. Research institutes and training centres that want an industrial-grade arm with straightforward recalibration also fit the profile.

Where the tooling and parts are lighter, buyers may find that a sibling suits the task better. The SIASUN SR25A-25/1.80 and the SIASUN SR25A-12/2.01 belong to the same family, and our team can advise which version fits your application. If you want a complete finishing package rather than a single arm, SIASUN's Polishing Expert System is worth comparing.

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

1. Arc welding – seam welding of fabricated parts, supported by the integrated wire feeder and hollow wrist.
2. Light-duty grinding – surface finishing with the kit system and its single-head force-controlled tool.
3. Deburring of castings – removing edges and flash where repeatable tool paths matter.
4. Material handling – moving mid-weight parts between conveyors, fixtures and storage.
5. Machine loading and unloading – tending machine tools and presses from a single base position.
6. Assembly – placing and joining components that call for both load capacity and precision.

Pricing and Availability

Robots Europa supplies the SIASUN SR25A-35/1.80 on quotation. Each robot cell has its own requirements for tooling, controller configuration and integration. A quotation lets us match the configuration to your application, whether that is the standard arm or the grinding kit system. Delivery, customs and support are arranged with the quotation. To receive a tailored offer for your project, use the quotation request available on this page.

Frequently Asked Questions

What payload and reach does the SIASUN SR25A-35/1.80 offer?

The arm carries a payload of 35 kg (77.2 lbs) and has a reach of 1803mm. Its repeatability is ±0.05mm.

What protection rating does the wrist have?

The wrist is rated IP65. This suits environments with dust, spatter and coolant mist.

Is the robot suited to welding?

Yes. The integrated wire feeder improves feeding stability and operational efficiency. The hollow J4 to J6 axes keep the welding package clear of fixtures and the arm.

Can the SR25A-35/1.80 be used for grinding?

SIASUN offers it as a kit system with a single-head force-controlled tool for light-duty grinding. We can specify this configuration with your quotation.

How is zero-position calibration carried out?

Each joint has a dedicated zero-position calibration groove. Precise zero alignment is achieved with a dedicated tool, which simplifies recovery after maintenance.

What material is the arm made of?

The arm is produced by a special casting process using automotive engine-grade aluminium alloy. This construction keeps the robot light for the load it carries.

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

You can buy it from Robots Europa, which supplies customers across the EU and the DACH region. The cost depends on configuration, tooling and integration scope. Please request a quotation through this page.

Summary

The SR25A family code points to a mid-weight platform, but the SIASUN SR25A-35/1.80 carries 35 kg. It combines that load with a reach of 1803mm, a repeatability of ±0.05mm and an IP65 wrist. Hollow J4 to J6 axes, a ±180° range on J5 and J6, an integrated wire feeder and calibration grooves on every joint make it a practical choice for welding, light grinding and mid-weight handling. A cast aluminium alloy structure keeps the arm light for its load. Robots Europa arranges delivery and support with your quotation. If your next cell needs more load than the platform name suggests, this page is the starting point.