SIASUN Industrial Robot Arm with 3053 mm Reach, 120kg Max Payload, 6 DOF (SR210-120/3.05)

The SIASUN Industrial Robot Arm with 3053 mm Reach, 120kg Max Payload, 6 DOF (SR210-120/3.05) is a heavy-duty six-axis articulated robot built around an unusual combination: a 120 kg nominal payload paired with a 3,053 mm maximum reach. With ±0.08 mm repeatability stated by the manufacturer and an IP65-rated wrist, the arm is intended to work accurately in shop-floor environments where dust, particulates, and coolant spray are routine. This page summarizes what is documented about the model, where it fits in a production cell, and how to move forward with a procurement enquiry.

Background

SIASUN and its high-payload six-axis series

SIASUN is a Chinese industrial robotics manufacturer whose portfolio spans articulated arms, mobile robots, and automation systems for factory environments. Within its industrial arm range, the company groups high-payload, long-reach models into a series that trades off span against carrying capacity: some variants prioritize payloads in the 165–210 kg class over shorter reaches, while others, like the SR210-120/3.05, extend the working envelope at a reduced payload rating. Company materials describe the SR210-120/3.05 as a "long-arm" configuration within its six-axis class, with structural design work aimed at cycle-time and energy-efficiency optimization. That series context matters for buyers, because the correct model choice usually comes down to whether reach or payload is the binding constraint in the target cell.

Why long-arm robots exist

Conventional six-axis robots often need external linear axes, gantries, or repositioned fixtures to cover wide conveyors, deep cells, or jigs spaced across large fixtures. Each added axis increases cost, programming complexity, floor space, and maintenance burden. A long-arm robot addresses the same coverage problem with standard six-axis kinematics: the extended arm sweeps a larger envelope from a single fixed base, whether that base is bolted to the floor or hung from a ceiling structure. SIASUN's literature for the SR210-120/3.05 emphasizes a lightweight, high-rigidity arm architecture intended to keep the end effector stable at full extension, so that the extra span does not come at the cost of accuracy or cycle time. For brown-field retrofits in particular, the ability to reach existing stations without re-laying out the line is often the deciding factor.

Technical Specifications

These figures are drawn from SIASUN product literature and current listing text; they should be confirmed against the latest official datasheet during quotation, as manufacturers periodically revise specifications and controller pairings.

How does a 3,053 mm reach change cell design?

A reach above three metres puts the SR210-120/3.05 in a small group of standard articulated robots that can service multiple stations, deep pallets, or wide infeed and outfeed zones without a seventh axis. In practice this means an integrator can position one robot between two machine tools and tend both, or place parts into fixtures located beyond guarding that a shorter arm could not clear. Ceiling mounting extends this further: an inverted installation over a production line frees floor space and lets the arm work downward into stations on either side. Tooling weight, offset, and inertia should always be checked against the manufacturer's wrist load diagrams during application engineering.

How accurate and robust is the SR210-120/3.05?

Manufacturer literature specifies ±0.08 mm repeatability, which SIASUN attributes to its drive technology and precision manufacturing processes intended to minimize backlash and thermal drift over long production cycles. Repeatability at that level supports precise pick-and-place, fixture loading, and multi-pass welding where the torch must return to the same seam position pass after pass. The wrist carries an IP65 rating, indicating protection against dust ingress and low-pressure water jets — relevant in cutting, grinding, and welding cells where particulates and coolant spray reach the end of the arm first.

Who is the SIASUN SR210-120/3.05 for?

This robot is aimed at manufacturers and system integrators whose applications are reach-constrained rather than purely payload-constrained. It also suits retrofit projects where adding an external linear axis is impractical because of floor space, pits, or existing utilities. Buyers whose parts exceed 120 kg with tooling, or whose cells are compact enough for a standard-reach arm, should evaluate the higher-payload, shorter-reach variants in the same SIASUN series instead — a comparison a distributor can prepare as part of a quotation.

What is the SIASUN SR210-120/3.05 used for?

1. Heavy material handling and palletizing — moving parts up to the rated payload across large infeed and outfeed areas and into deep pallets, using grippers, vacuum frames, or magnetic lifters selected by the integrator.
2. Arc and resistance welding — carrying welding torches or guns through complex orientations in body-in-white and heavy-fabrication cells, with the IP65 wrist resisting spatter-zone dust and spray.
3. Machine loading and unloading — tending one or more machine tools, presses, or casting machines from a single base, including deep-cell loading where parts must be placed beyond guarding.
4. Assembly and fastening support — positioning and holding large subassemblies while screws, rivets, or adhesive are applied, exploiting the stated repeatability for toleranced interfaces.
5. Thermal cutting and surface processes — presenting parts or tools for cutting, grinding, or deburring operations in environments with particulates and coolant.
6. Line-spanning transfer tasks — ceiling-mounted transfer of parts between stations or across a production line where floor space is unavailable.

Pricing and Availability

Industrial robots in this class are quoted rather than sold at a list price, because the final cost depends on the controller package, cabling, software options, end-of-arm tooling, safety equipment, delivery terms, and commissioning support required for a specific cell. Availability and lead time also vary with configuration and region. To receive current pricing and delivery information for the SR210-120/3.05, submit a request for quotation with a short description of your application — payload including tooling, required reach, process type, and installation country — and a tailored proposal can be prepared, including comparison against neighbouring models in the SIASUN high-payload series where appropriate.

Frequently Asked Questions

What is the SIASUN SR210-120/3.05?

It is a six-axis articulated industrial robot arm from SIASUN, rated in manufacturer literature at a 120 kg nominal payload and a 3,053 mm maximum reach, designed for heavy material handling, welding, machine tending, and assembly.

How accurate is the SR210-120/3.05?

Manufacturer literature specifies repeatability of ±0.08 mm, which supports precise fixture loading, pick-and-place, and multi-pass welding. Absolute accuracy for a specific cell depends on calibration and tooling and should be reviewed during application engineering.

Can it be ceiling mounted?

Yes. The model is documented as supporting both floor-mounted and ceiling-mounted installation, which allows integrators to maximize reach over production lines or in tight cells.

Is it suitable for welding environments?

The wrist carries an IP65 ingress protection rating, which indicates resistance to dust and low-pressure water spray of the kind encountered in welding, cutting, and grinding cells. Full-cell suitability still depends on the integrator's protective design.

How does it compare with other robots in the SIASUN series?

SIASUN's high-payload series includes variants oriented toward 165–210 kg payloads with shorter reaches. The SR210-120/3.05 trades payload for span, so the right choice depends on whether reach or carrying capacity is the binding constraint.

What is included with the robot?

Scope of supply — controller, cabling, software, teach pendant, and any process packages — is configuration-dependent and confirmed at quotation. End-of-arm tooling is normally specified separately for the application.

Where can I buy the SIASUN SR210-120/3.05 and what does it cost?

Purchase details, current pricing, and lead time are confirmed through a request for quotation. Submit an enquiry describing your application and destination country, and a formal quotation with configuration options will be prepared.

Summary

The SIASUN SR210-120/3.05 addresses a specific engineering problem: covering a large working envelope with standard six-axis kinematics instead of external axes, while retaining a 120 kg payload, ±0.08 mm stated repeatability, and an IP65-protected wrist. Documented strengths include its 3,053 mm reach, flexible floor or ceiling mounting, and positioning within a broader SIASUN series that lets buyers trade span against payload. Specifications summarized here come from manufacturer literature and should be validated against the current official datasheet during procurement. For configuration advice, series comparisons, and a formal quotation, this page is the starting point.