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

In SIASUN’s industrial robot catalog, the SR25A-35/1.80 is listed with a 35 kg payload and 1803 mm reach, placing it among higher-payload options within SIASUN’s “small payload” grouping relative to very large payload arms. The model is positioned for a wide range of factory processes—including welding, cutting, handling, assembly, grinding/polishing, and loading/unloading—where an articulated arm can service multiple fixtures or stations from a single installation point.

Design and Features

Hollow-arm structure and internal cable routing

A core design theme of the SR25A-35/1.80 is a hollow arm concept with internal cable routing, which SIASUN states helps minimize interference and improve overall structural stiffness and safety. This approach is commonly used in industrial robotics to reduce snagging risk and simplify cell layout, especially in dense welding or handling setups.

J4–J6 hollow-axis concept for layout flexibility

SIASUN highlights the robot’s J4–J6 axis design as adhering to the hollow concept, intended to prevent interference and support more flexible layout arrangements—particularly when end-of-arm tools, dress packs, or process cables must move through tight work envelopes.

Wide motion range in the wrist axes

SIASUN states that the J5/J6 axes provide a wide motion range of ±180°, increasing applicability for complex approach angles and tool orientations (for example, multi-directional weld access, cut paths around obstructions, or flexible pick-and-place poses).

Lightweight construction and manufacturing methods

For weight reduction and mechanical performance, SIASUN notes the use of specialized casting techniques associated with the automotive industry and automotive engine-grade aluminum alloy, contributing to a lightweight body construction.

Integrated wire feeder and cable management

In applications where arc-welding or wire-fed processes are used, SIASUN notes that integration of a wire feeder improves wire feeding stability and operational efficiency, and that a designed cable management system improves overall flexibility.

Zero-position calibration groove design

SIASUN describes a joint design feature: each joint incorporates a zero-position calibration groove, enabling users to perform precise zero alignment using a dedicated tool—an implementation intended to simplify maintenance alignment workflows.

Technology and Specifications

SIASUN publishes key parameters for the SR25A-35/1.80 on its product page:

• Robot type: 6-axis articulated industrial robot

• Degrees of freedom (DOF): 6

• Rated payload: 35 kg

• Reach: 1803 mm

• Repeatability: ±0.05 mm

• Protection (wrist): IP65

SIASUN’s industrial robot listing also presents the SR25A-35/1.80 with 35 kg payload and 1803 mm reach, consistent with the model naming and its intended mid-payload role.

Applications and Use Cases

SIASUN lists the following application areas for the SR25A-35/1.80: welding, cutting, handling, assembly, grinding and polishing, and loading and unloading. In practice, the combination of ~1.8 m reach and 35 kg payload is often used to support:

Welding cells and smart welding workstations

SIASUN explicitly includes welding in the application scope and references welding-related case studies associated with this product family page (e.g., automotive welding assembly line and teach-free welding robot solutions). The integrated wire-feeder design focus suggests optimization for stable welding cable routing and process reliability.

Material handling and machine tending

For handling and loading/unloading, the SR25A-35/1.80 can be configured with grippers, vacuum tooling, or custom EOAT to transfer parts between conveyors, pallets, fixtures, or machines—especially where the tooling and part mass fit inside a 35 kg payload envelope.

Cutting and finishing operations

Cutting and grinding/polishing are listed as intended domains. In many factories, these tasks benefit from stable high-speed motion and flexible wrist orientation to maintain consistent tool contact angles and path quality across curved or irregular workpieces.

Assembly processes requiring reach and orientation freedom

Assembly tasks can benefit from the robot’s reach and wrist range, enabling insertion, fastening, and component placement across multi-fixture stations without relocating the base. SIASUN frames the robot as capable of maintaining precision and stability during intense production cycles.

Advantages / Benefits

High-performance motion under intensive cycles

SIASUN emphasizes that, with “outstanding dynamic performance,” the robot maintains high-precision operation even at high cycle speeds, supporting demanding production conditions.

Layout-friendly dress pack management

The hollow-arm and internal routing approach is explicitly presented as minimizing interference, improving stiffness, and supporting safer operation—benefits that typically reduce downtime from cable wear and simplify integration in tight workcells.

Broader process coverage from a mid-payload platform

By positioning the SR25A-35/1.80 as an upgrade expanding application scope, SIASUN frames the model as a flexible option for manufacturers that want one robot platform to cover multiple processes (welding, handling, finishing, and more) across different production lines.

Maintenance-oriented alignment design

The zero-position calibration groove feature is intended to support precise and repeatable zero alignment using a dedicated tool—useful for service workflows and restoring reference positions after maintenance.

FAQ Section 

What is the SIASUN SR25A-35/1.80?

The SIASUN SR25A-35/1.80 is a 6-axis industrial robot rated for 35 kg payload with 1803 mm reach, designed for applications including welding, cutting, handling, assembly, grinding/polishing, and loading/unloading.

How does the SR25A-35/1.80 work?

It executes programmed motion paths using a multi-joint articulated arm. SIASUN highlights a hollow-arm, internal cable routing structure and a wrist-axis design with wide motion range to reduce interference and support flexible tool orientations in production cells.

Why is the SR25A-35/1.80 important?

It targets manufacturers that need a mid-payload robot capable of maintaining precision, speed, and stability during intense production cycles, while supporting diverse processes from welding and cutting to handling and finishing.

What are the benefits of the SR25A-35/1.80?

SIASUN lists benefits including internal cable routing to reduce interference, high dynamic performance for high-cycle production, ±180° wrist-axis motion range, lightweight aluminum-alloy construction methods, and maintenance-friendly joint alignment features.

Summary

The SIASUN SR25A-35/1.80 is a mid-payload 6-axis industrial robot positioned for versatile factory automation across welding, cutting, handling, assembly, and finishing. SIASUN highlights engineering features such as a hollow-arm/internal cable routing concept, a wide ±180° wrist-axis motion range, lightweight aluminum-alloy casting methods, and maintenance-oriented calibration features. With published parameters of 35 kg payload, 1803 mm reach, ±0.05 mm repeatability, and IP65 wrist protection, the SR25A-35/1.80 is presented as a production-focused platform designed to deliver precision and stability under intensive cycle conditions.