SIASUN Industrial Robot Arm (SR25A-25/1.80)

A robot arm earns its place in a cell by repeating the same motion the same way, shift after shift, and by working in the tight corner where a bulkier machine cannot go. The SIASUN Industrial Robot Arm (SR25A-25/1.80) is built around that idea: a hollow, stiff arm with generous wrist travel that can stand on the floor or hang from above.

This product is available through this page, by quotation.

Background

SIASUN and the lineage of the SR25A

SIASUN is one of the pioneers of industrial robot development in China. Its range runs from small machines with a payload of 4kg up to heavy models rated at 500kg, so a plant can often stay with one maker as its tasks grow or shrink. For buyers in the Caribbean, where a single maintenance team often looks after several kinds of equipment, a family of related robots is a practical advantage.

The SR25A-25/1.80 is an upgraded iteration of the 20 kg-class product from the same maker. The main change is a redesigned fourth-to-sixth axis structure, which lets the robot adapt to a broader range of application scenarios and industries. The wrist is where most of the day-to-day work of an arm happens, so reworking it is a meaningful step rather than a cosmetic one.

Key technology: hollow arm, cast aluminum and calibration grooves

The arm is hollow, and the cables run inside it. Routing the cables internally minimizes interference with fixtures, tooling and neighboring equipment, and it adds to the structural stiffness and safety of the arm. Loose cables are a common source of snags and wear in welding and handling cells, so keeping them inside the structure is a sensible choice.

The castings are made with a special casting process using automotive engine-grade aluminum alloy. Each joint also carries a zero-position calibration groove. With a dedicated tool, users can align each joint precisely to its zero position, which helps when a robot has been serviced, moved or recovered after a collision.

The robot keeps high-precision operation even at high cycle speeds, which suits demanding production conditions where time per part matters as much as accuracy.

Technical Specifications

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

The manufacturer has not published the weight, the power supply, the controller model, the axis speeds, the operating temperature, the mounting dimensions, what is in the box or the wrist moment limits; they are confirmed at quotation.

What makes the SR25A-25/1.80 suited to confined spaces?

Two features do most of the work here: the mounting options and the wrist. The arm can be floor-mounted or ceiling-hung, which makes it a good fit for tasks with small turning radii and in confined spaces. Hanging a robot from above frees floor area for conveyors, operators and fixtures, and it lets the arm reach down into a workstation from a position that stays out of the way.

The wrist adds to this. The J5 and J6 axes each offer a motion range of ±180°, which gives the tool more ways to approach a part and gives the programmer more freedom when planning a path around obstacles. Combined with a reach of 1803mm, the arm can serve a work area that is wider than its footprint suggests.

The hollow arm with internal cabling supports the same goal. With fewer cables outside the structure, there is less to catch on a fixture when the wrist turns through its full range.

How do precision and protection show up on the shop floor?

Repeatability is ±0.05mm. In practice that means the tool returns to a taught point with very little scatter, which matters for assembly, for consistent weld seams and for loading parts into machines with tight tolerances. The robot holds this kind of precision at high cycle speeds rather than only when moving slowly.

The wrist is protected to IP65. Grinding, polishing, cutting and welding all produce dust, spatter or fine debris, and a protected wrist is better prepared for that environment than an open one.

Who is the SR25A-25/1.80 for?

Integrators and plant engineers who need a robot in the 25 kg class, with a long reach and a flexible wrist, will find the most value here. Typical buyers include metal fabrication shops, workshops that handle heavy parts, and manufacturers who want to automate repetitive welding, grinding or loading work without rebuilding the whole cell.

Companies with limited floor space should look closely at the ceiling-hung option. Operations that must keep a robot close to a machine, a press or a conveyor benefit from its small turning radii.

If your parts are lighter and you need a different reach, the sibling version SR25A-12/2.01 may suit the task better; compare it before you decide. A third version, SR25A-35/1.80, belongs to the same family, and we can quote it on request. You can also browse the wider Robot Arms category to see the other models in the range.

What is the SR25A-25/1.80 used for?

1. Welding. A stiff arm and consistent repeatability help hold the torch steady along the seam.
2. Cutting. The wide wrist range lets the tool follow contours and approach the workpiece from different angles.
3. Handling. The 25 kg payload and long reach move parts between stations and conveyors.
4. Assembly. Repeatable positioning supports placing and joining components cycle after cycle.
5. Grinding and Polishing. The IP65 wrist protection suits work that produces dust and fine debris.
6. Loading and Unloading. The robot feeds machines and takes finished parts out, working from the floor or from above.

Pricing and Availability

No prices are listed on this page, because the right configuration depends on your application, your tooling and your site. Request a quotation and tell us what the robot will do, which version you are considering and where it will be installed. Delivery, customs and support are arranged with the quotation. The SIASUN Industrial Robot Arm (SR25A-25/1.80) is available on this page.

Frequently Asked Questions

What payload and reach does the SR25A-25/1.80 have?

The payload is 25 kg (55.1 lbs) and the reach is 1803mm.

How accurate is it?

The repeatability is ±0.05mm, and the robot keeps high-precision operation even at high cycle speeds.

Can it be mounted on the ceiling?

Yes. It can be floor-mounted or ceiling-hung, which makes it a good choice for tasks with small turning radii and in confined spaces.

What protection rating does it have?

The wrist is rated IP65. Ask us about the rest of the robot when you request your quotation.

Which applications is it designed for?

It is intended for welding, cutting, handling, assembly, grinding and polishing, and loading and unloading.

Are the weight, controller and power requirements available?

Those details are not listed on this page. Ask for them with your quotation request so that you have what you need for planning.

Where can I buy the SR25A-25/1.80 and what does it cost?

You can request it through this page, by quotation. We do not print prices here; the quotation covers your configuration, delivery, customs and support.

Summary

The SR25A-25/1.80 is a robot that does its best work where space is tight and the job repeats. It combines a 25 kg payload, an 1803mm reach, ±0.05mm repeatability, an IP65 wrist and ±180° on the J5 and J6 axes in a hollow, cast aluminum arm that can stand on the floor or hang from above. If that profile matches your cell, this page is the starting point.