SIASUN Medium-Payload Industrial Robot (SR25A-20/1.80)

SIASUN (also styled “SIASUN Robot & Automation”) is a Chinese robotics company founded in 2000 and known for industrial, mobile, and special-purpose robots, along with automation solutions across multiple application domains.

In typical deployments, a robot in the SR25A class is positioned as a general-purpose articulated arm for machine tending, pick-and-place, packaging, palletizing support, and light-to-medium process work. The SR25A-20/1.80 configuration is characterized by a 20 kg maximum rated payload and an approximately 1.8 m working reach, making it suitable for production cells that require a balance of reach, throughput, and integration flexibility.

Design and Features

Mechanical architecture

The SR25A-20/1.80 is an articulated 6-DOF (six degrees of freedom) robot, a common industrial architecture that uses multiple rotary joints to position a tool center point (TCP) in three-dimensional space with orientation control. This configuration enables:

• Flexible approach angles for parts in fixtures or conveyors

• Compact cell layouts compared with gantry-style automation

• Multi-step task chaining (e.g., pick → reorient → place → inspect)

Mounting and cell integration

The SR25A-20/1.80 is designed to support multiple installation orientations, allowing it to be integrated into different cell geometries, including floor mounting and alternative mounting positions such as inverted or side-wall configurations (where supported by the installation plan and safety design).

Environmental protection

For many factories, dust, splash, and general industrial contamination are practical constraints. The SR25A-20/1.80 is listed with an IP54 protection rating (commonly interpreted as limited dust ingress protection and resistance to splashing water), which can be relevant for typical shop-floor conditions when paired with appropriate safeguarding and maintenance practices.

Technology and Specifications

Core specifications (as commonly published)

The SR25A-20/1.80 is typically specified with the following key parameters:

• Axes / DOF: 6

• Rated payload: 20 kg

• Reach: 1800 mm

• Repeatability: ±0.05 mm

• Protection rating: IP54

• Robot mass: 295 kg

• Controller model: SRC5

These figures place the robot in a widely used industrial segment: 20 kg-class payload with extended reach, often used where a single arm must service multiple stations or work across wider conveyors, fixtures, or machine doors.

Control system

The SR25A-20/1.80 is listed as using the SIASUN SRC5 controller. In practice, industrial robot controllers typically provide:

• Motion planning and servo control for multi-axis coordination

• Digital and analog I/O integration for sensors, safety, and peripherals

• Communication interfaces for PLC integration (vendor- and configuration-dependent)

• Programming environments for point-to-point and path-based motion

(Exact interface options, fieldbus support, and software features generally depend on the controller configuration, software version, and regional package.)

Performance considerations

In manufacturing automation, the “best” robot is determined less by a single headline spec and more by how payload, reach, stiffness, and repeatability combine for the intended tool and process. For example:

• A 20 kg payload may be consumed quickly by a gripper, cabling, and a part—so end-of-arm tooling (EOAT) design is often crucial.

• A 1.8 m reach can reduce the number of robots needed in a cell by increasing the work envelope, but may require careful cycle-time planning and collision analysis.

• ±0.05 mm repeatability supports many handling and loading tasks; tighter processes (e.g., precision metrology or fine assembly) may demand higher accuracy calibration and/or external sensing.

Applications and Use Cases

Material handling and machine tending

A common use case is machine tending—loading and unloading CNC machines, presses, or other production equipment. The reach can be advantageous when the robot must service multiple machines or approach deep work areas (e.g., through machine doors) while keeping the base outside the tightest part of the cell.

Packaging and end-of-line operations

In packaging environments, 20 kg-class robots are often used for:

• Case packing (placing products into cartons)

• Tray loading

• End-of-line transfer to conveyors or staging areas

When combined with vision systems (where required), such systems can accommodate product mix changes and variable presentation.

General-purpose automation

The SR25A-20/1.80 class can be deployed as a general-purpose manipulator in mixed automation cells, including:

• Pick-and-place from conveyors

• Kitting and part presentation

• Simple deburring or tool presentation (where process forces remain within limits)

Advantages / Benefits

Balanced payload-to-reach class

The SR25A-20/1.80 occupies a practical “middle ground” between compact 10–12 kg arms and heavy-payload robots. The combination of 20 kg payload and 1800 mm reach is often selected to cover multiple tasks without moving to larger, higher-cost robot classes.

Repeatability suited to industrial handling

A listed repeatability of ±0.05 mm supports many routine industrial tasks such as consistent placement into fixtures, repeatable machine loading, and controlled approach to pallets or trays.

Integration flexibility

Support for multiple installation modes and a standard industrial controller platform (SRC5) can help integrators design cells that fit space constraints and production flow.

FAQ Section

What is the SIASUN SR25A-20/1.80?

The SIASUN SR25A-20/1.80 is a 6-axis industrial robot arm designed for factory automation tasks such as handling, machine tending, and general production support. It is commonly specified with 20 kg payload and 1800 mm reach.

How does the SR25A-20/1.80 work?

Like most articulated industrial robots, it uses six motor-driven rotary joints controlled by a dedicated robot controller (listed as SRC5) to move a tool (gripper or process tool) through programmed positions and paths.

Why is the SR25A-20/1.80 important in automation?

Robots in this class help manufacturers improve throughput, consistency, and safety by automating repetitive handling tasks. The 1.8 m reach can allow one robot to serve multiple stations, while the payload class supports a wide range of grippers and part sizes.

What are the benefits of the SR25A-20/1.80?

Common benefits include 20 kg rated payload, 1800 mm reach, and ±0.05 mm repeatability, which together support many mid-range industrial handling and loading applications.

Summary

The SIASUN SR25A-20/1.80 is a medium-payload, long-reach, 6-axis industrial robot positioned for general-purpose factory automation. With a commonly listed 20 kg payload, 1800 mm reach, ±0.05 mm repeatability, IP54 rating, and SRC5 controller, it fits a broad range of handling and machine-tending scenarios where reach and flexibility matter.