SIASUN SR25A-25/1.80 (SR25A-25/1.80)

The 25 kg class is where many factories start with robots. It is enough for a vacuum gripper with a full layer of cartons, a double gripper for a machine tool or a screwdriving head with its feeder, without the size and cost of a heavy arm. What often decides the choice is how the robot fits into the space available. The SIASUN SR25A-25/1.80 is built to be easy to place: it can stand on the floor or hang from the ceiling, its cables run inside the arm, and its 1803 mm reach covers a wide area from a single position.

Background

SIASUN is a Chinese robotics manufacturer whose industrial range covers SCARA robots, six axis arms from small to ultra high payload, collaborative robots and mobile robots. The SR25A series is its compact six axis platform. SIASUN describes the SR25A-25/1.80 as an upgraded version of its 20 kg class robot, with a redesigned fourth to sixth axis structure that opens it to more applications and industries. The model name gives the series, payload in kilograms and reach in meters. For heavier tools, the SR25A-35/1.80 offers 35 kg with the same reach.

Key Specifications

Arm weight, J1 to J4 ranges and joint speeds should be confirmed on the current datasheet for your process.

Features

Floor or Ceiling Mounting

The SR25A-25/1.80 can be installed upright on the floor or inverted from the ceiling or a gantry. Ceiling mounting frees the floor beneath the robot for conveyors, fixtures and operator access, and lets the arm reach down into machines or across a line from above. In crowded plants, this flexibility can decide whether automation fits at all.

Hollow Arm, Fewer Snags

Cables run inside the arm and through the redesigned J4 to J6 wrist. With fewer lines on the outside, there is less to catch on parts or guarding, and SIASUN notes the design also improves stiffness and safety. Gripper air lines and sensor cables follow a predictable path as the wrist turns.

Light Body for Fast Cycles

The arm is cast from lightweight aluminum alloy. Lower moving mass lets the robot accelerate and stop quickly while holding ±0.05 mm repeatability, which keeps cycle times short in pick and place and assembly work.

Flexible Wrist

J5 and J6 each rotate ±180°, so the tool can approach parts from many angles and turn them over during handling without extra fixtures.

Simple Calibration

A zero position calibration groove on each joint works with a dedicated tool to restore reference positions quickly after maintenance, helping production restart sooner.

Applications

• Material handling. Moving parts, trays and cartons up to 25 kg including the gripper.
• Assembly. Placing, pressing and fastening components in automotive, appliance and electronics lines.
• Machine tending. Loading CNC machines, presses and molding machines, including from a ceiling mount above the machine.
• Welding and cutting. Lighter torch packages routed through the hollow wrist. See our welding robots.
• Grinding and polishing. Finishing smaller parts. SIASUN also offers a grinding and polishing system built on its SR25A and SR12A arms.

More options are in our factory robots and industrial robots ranges.

Which Should You Buy?

See the full lineup in SIASUN small and medium payload robots and all SIASUN industrial robots.

Before You Buy

• Calculate the tool load. Add the gripper, adapter, cables and the heaviest part, and check the load center and wrist inertia. If you are close to 25 kg, consider the 35 kg model.
• Choose the mounting. For ceiling or gantry mounting, confirm the structure's stiffness and load rating, and the reach envelope in the inverted position.
• Map the work area. Check that every point sits inside the 1803 mm reach with the correct tool angle.
• Confirm routing. Make sure your air and signal lines fit through the hollow arm and wrist.
• Plan integration and safety. Check PLC and vision communication, guarding and a risk assessment.

Pricing and Availability

The SIASUN SR25A-25/1.80 is supplied on a quotation basis. The final cost depends on controller options, mounting, tooling, shipping and any integration work. Request a quote from this page and our team will confirm the price, lead time, warranty and support for your location.

Frequently Asked Questions

What is the payload of the SIASUN SR25A-25/1.80?

25 kg at the wrist, including the tool and the part.

How far can it reach?

The maximum reach is 1803 mm.

How accurate is it?

Repeatability is ±0.05 mm.

Can it be mounted on the ceiling?

Yes. It supports floor and ceiling mounting, which helps in tight spaces and above machines or conveyors.

Should I choose the 25 kg or 35 kg version?

Both have the same reach. Choose the SR25A-35/1.80 if your gripper and part together approach 25 kg or if you need margin for heavier tools.

Where are the cables routed?

Inside the hollow arm and through the J4 to J6 wrist, which reduces interference with parts and fixtures.

Where can I buy the SIASUN SR25A-25/1.80?

You can request a quote directly on this page. Our team will confirm pricing, lead time and delivery for your region.

Summary

The SIASUN SR25A-25/1.80 is a versatile 25 kg robot that fits where space is tight. With 1803 mm reach, ±0.05 mm repeatability, floor or ceiling mounting, a hollow arm and wrist and a light aluminum body, it suits handling, assembly, machine tending and light welding. Request a quote on this page to check it against your application.