SIASUN SR50A-70/2.15 (SR50A-70/2.15)

Most medium-payload cells ask one robot to be two things: stiff enough to lean into a workpiece, and quick enough not to hold up the line. The SIASUN SR50A-70/2.15 (SR50A-70/2.15) is designed around that tension, pairing a rigid, efficient transmission with a lighter body and a faster cycle than the generation before it.

The product is available through this page, by quotation.

Background

The SIASUN brand and the SR50A line

SIASUN builds industrial robots, and the SR50A-70/2.15 sits in that range as a machine specially designed for medium-payload applications. The model code carries its own information: the SR50A series name, then the 70 and 2.15 figures that distinguish this version from its sibling, the SR50A-50/2.15. Because the two versions are named separately, every figure on this page belongs to the SR50A-70/2.15 alone.

For buyers across the islands who are building out a first or second automated cell, the practical point is placement. This is not a light-duty arm for small parts, and it is not a heavy-duty giant. It is the middle class of industrial robot, where much of everyday manufacturing, finishing and logistics work actually happens. You can see the wider range in our Industrial Robots category.

Positioning and key technology

The SR50A-70/2.15 offers high rigidity, high inertia and high transmission efficiency. Rigidity matters because a robot that flexes under load loses accuracy exactly when the tool meets the work. High transmission efficiency means more of the motor's effort reaches the arm.

Two further design choices stand out. The first is the J6 motor, which has full-body protection and an integrated spiral cable. That arrangement prevents interference between the robot's internal wiring and the user's external cables, which is a common source of wear and nuisance faults at the wrist. The second is the drive and control package: advanced servo drive technology and a high-precision control system keep the arm stable and positioned precisely even during high-speed operation.

The high-rigidity transmission design works together with a variable acceleration algorithm. The result is faster overall cycle times, with significantly increased axis speeds compared to the previous generation.

Technical Specifications

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

The manufacturer has not published the weight, the axis speeds, the axis motion ranges, the power supply, the controller model, the mounting options, the operating temperature, the wrist moment and inertia ratings or the package contents; they are confirmed at quotation.

What makes the SR50A-70/2.15 different from the previous generation?

Two comparisons stand out. The first is speed: the high-rigidity transmission and the variable acceleration algorithm bring faster cycle times and significantly higher axis speeds, which together deliver a 20% improvement in efficiency. In a cell where the robot is the pacing station, that kind of gain translates into more parts per shift without adding a second machine.

The second is mass. The robot body is lighter, with a 10% weight reduction compared to the previous generation. A lighter arm carries less of its own weight through every move, and this goes together with stability and precise positioning during high-speed operation. If your foundation or mounting design depends on the exact body weight, mention it when you request your quotation.

Neither gain comes at the cost of the qualities that matter for contact work. High rigidity and high inertia remain headline features, which is why the same robot is positioned for both fast handling and grinding.

Can the SR50A-70/2.15 handle grinding as well as material handling?

Yes: it excels in medium-scale material handling and grinding operations. For grinding there is a dedicated kit system. It pairs the SR50A-70/2.15 with a dual-head force-controlled tool and is intended for medium- to heavy-duty grinding scenarios.

Force control is what separates a grinding cell from a simple positioning cell. The tool responds to the pressure it meets rather than only following a fixed path, so the contact between abrasive and workpiece stays consistent. The robot's rigid structure supports that approach, and the IP65 rating at the wrist is relevant in an environment where dust is part of the process.

The robot is also capable of performing complex motions in three-dimensional space, which lets it adapt to workpieces of different shapes and sizes. That flexibility is useful for shops that run mixed batches instead of a single repeated part.

Who is the SR50A-70/2.15 for?

The first group is metalworking and fabrication shops that grind, deburr or finish parts and want to move that dusty, repetitive work away from people. The grinding kit system with its force-controlled tool is aimed squarely at them.

The second group is plants that move medium-weight workpieces between stations: loading and unloading machines, feeding lines, or transferring parts between fixtures. With a 70 kg payload and a 2158mm reach, the arm covers a generous working envelope for that kind of task.

The third group is integrators who build cells for local customers. A robot with an integrated spiral cable at the J6 motor and full-body motor protection simplifies tooling design and cable routing, and a single platform that serves both handling and grinding reduces the number of robot types an integrator must support. If your load is lighter, browse the Small Payload category instead; if you are considering the SR50A-50/2.15 sibling, ask us to compare the two with your quotation.

What is the SR50A-70/2.15 used for?

1. Material handling. Moving medium-weight workpieces between stations, machines and fixtures at the cycle speed the transmission design allows.
2. Grinding. Medium- to heavy-duty grinding with the kit system and its dual-head force-controlled tool.
3. Machine loading. Presenting parts to processing equipment, where precise positioning matters at every pick and place.
4. Workpieces of varied shape. Complex three-dimensional motions let one arm serve parts of different sizes and forms.
5. High-speed operation. Servo drive technology and a high-precision control system keep positioning stable when the cell runs fast.
6. Dust-exposed work. The IP65 wrist protection suits tasks where the end of the arm meets debris and dust.

Pricing and Availability

We do not publish prices on this page. Please request a quotation, and tell us your application, whether you need the grinding kit system, and where the robot will be installed. Delivery, customs and support are arranged together with the quotation, so you have the whole picture before you decide. The SIASUN SR50A-70/2.15 is available on this page.

Frequently Asked Questions

What payload does the SR50A-70/2.15 carry?

The payload is 70 kg (154.3 lbs). It is designed as an industrial robot for medium-payload applications.

How far can it reach?

The reach is 2158mm. Axis motion ranges are not listed on this page.

How precise is it?

Repeatability is ±0.05mm. The control system and servo drive technology are built to keep positioning precise even at high speed.

What protection rating does it have?

The wrist protection is IP65. The J6 motor also has full-body protection and an integrated spiral cable.

Is a grinding package available?

Yes. The SR50A-70/2.15 kit system uses a dual-head force-controlled tool for medium- to heavy-duty grinding. Ask us about its scope when you request a quotation.

How does it improve on the previous generation?

It offers a 20% improvement in efficiency, with significantly increased axis speeds, and a 10% weight reduction of the robot body.

Where can I buy the SR50A-70/2.15 and what does it cost?

You can buy it through this page by requesting a quotation. We do not list a price here; the cost depends on your configuration and delivery, and you receive it with the quotation.

Summary

The SIASUN SR50A-70/2.15 answers a familiar tension: a medium-payload robot has to be rigid enough for grinding and fast enough for handling. With a 70 kg payload, 2158mm reach, ±0.05mm repeatability, an IP65 wrist, a 20% efficiency gain and a 10% lighter body than the previous generation, it is built to do both. The remaining details, from weight to controller, come with the quotation. To discuss your application and receive a quotation, this page is the starting point.