Payload
The maximum mass at the arm flange - including the tool (torch, gripper, sensor), not just the part. Nominal and maximum payload are given, and the actual value depends on extension (payload–reach curve).
Cobot arms in WS kits
Fairino cobot distributor
Fairino FR cobot arms - the base of WS kits
Every Welderstal WS cobot is built on a proven Fairino FR cobot arm - from the FR3 to the FR30. Here you can see the base models and their parameters, and clicking a model takes you to the ready-to-work WS cobot.
A cobot arm on its own is only a technical base. You buy a ready-made cell as a Welderstal WS kit - a deployment with tool, equipment, plugins, configuration, training and support.
Fairino FR cobot arm only
Series
Fairino FR
Models
FR3 – FR30
Payload
3 – 30 kg
Reach
622 – 1900 mm
Bare arm or WS cobot
How a Fairino FR cobot arm differs from a Welderstal WS kit
This page shows the Fairino FR cobot arms - the arm alone, i.e. the technical base. A ready-made cell comes into being only as a WS cobot, when the arm is joined by a tool, equipment, configuration, safety, training and support.
Fairino FR cobot arm only
Welderstal WS kit
Fairino FR cobot arm only
FR model selected for payload, reach, pace and workspace
No working tool
Torch, gripper, holder, fixturing, positioner or table selected for the process
Programming and integration on the buyer’s side
Process configuration, Welderstal plugins and handover to the operators
Safety assessed only on the shop floor
Assessment of the whole cell, commissioning, training and support after start-up
Fairino FR cobot arm only
Fairino FR cobot arm only
Welderstal WS kit
FR model selected for payload, reach, pace and workspace
Fairino FR cobot arm only
No working tool
Welderstal WS kit
Torch, gripper, holder, fixturing, positioner or table selected for the process
Fairino FR cobot arm only
Programming and integration on the buyer’s side
Welderstal WS kit
Process configuration, Welderstal plugins and handover to the operators
Fairino FR cobot arm only
Safety assessed only on the shop floor
Welderstal WS kit
Assessment of the whole cell, commissioning, training and support after start-up
Fairino FR models
Send your process for assessment Nine models - from the FR3 to the FR30
These are Fairino cobot arms - the technical base alone. Each card shows the parameters of the arm on its own. Clicking a model takes you to the ready-made Welderstal WS kit - a deployment built on that base.
Cobot arm only
FR3
6 axes from €4,600 net · indicative
3 kg
Payload
622 mm
Reach
Max. payload 5 kg · IP54 (IP65 option) · base 128 mm
Small parts, tight cells, light tools, testing and operator training.
See the WS cobot based on the FR3 Cobot arm only
FR3-WMS
6 axes from €6,490 net · indicative
3 kg
Payload
622 mm
Reach
Max. payload 5 kg · IP54 (IP65 option) · base 128 mm
Light, compact welding variant (Welding, short reach) - easy to move between changing workstations.
See the WS cobot based on the FR3-WMS Cobot arm only
FR3-WML
6 axes from €6,690 net · indicative
3 kg
Payload
922 mm
Reach
Max. payload 5 kg · IP54 (IP65 option) · base 128 mm
Welding variant of the FR3 with extended reach (Welding, long arm) for larger welds and structures.
See the WS cobot based on the FR3-WML Cobot arm only
FR5
6 axes from €4,900 net · indicative
5 kg
Payload
922 mm
Reach
Max. payload 7 kg · IP54 (IP65 option) · base 149 mm
Light production tasks, welding, placing and handling parts.
See the WS cobot based on the FR5 Cobot arm only
FR5-WML
6 axes from €10,888 net · indicative
5 kg
Payload
1900 mm
Reach
Max. payload 7 kg · IP54 (IP65 option) · base 149 mm
Welding variant of the FR5 with the longest reach in the family (Welding, long arm) for large structures and long welds.
See the WS cobot based on the FR5-WML Cobot arm only
FR10
6 axes from €10,388 net · indicative
10 kg
Payload
1400 mm
Reach
Max. payload 14 kg · IP54 (IP65 option) · base 190 mm
Versatile range: welding, packing and tending mid-size cells.
See the WS cobot based on the FR10 Cobot arm only
FR16
6 axes from €10,388 net · indicative
16 kg
Payload
1034 mm
Reach
Max. payload 20 kg · IP54 (IP65 option) · base 190 mm
Heavier tools and larger parts when you need payload headroom.
See the WS cobot based on the FR16 Cobot arm only
FR20
6 axes from €14,678 net · indicative
20 kg
Payload
1854 mm
Reach
Max. payload 25 kg · IP54 (IP65 option) · base 243 mm
Palletising, end of line, the longest reach and work with large structures.
See the WS cobot based on the FR20 Cobot arm only
FR30
6 axes from €14,678 net · indicative
30 kg
Payload
1403 mm
Reach
Max. payload 35 kg · IP54 (IP65 option) · base 243 mm
The heaviest tasks in the family, high payload and rigid mounting.
See the WS cobot based on the FR30The parameters are data for the Fairino FR arm alone. We make the final selection of the model for a WS cobot after analysing the process, tool, fixturing, pace and safety requirements.
Indicative net prices for the cobot arm only (without equipment, tool, deployment and transport) - they do not constitute an offer within the meaning of Art. 66 of the Polish Civil Code. The Welderstal WS kit is quoted individually after a process analysis.
How to read the specs
What cobot arm data means
Before you compare models, it is worth knowing what the datasheet parameters really mean. This helps you avoid the most common mistake - choosing an arm by the part weight alone, without the tool and extension.
Reach
The distance from the base to the farthest working point. It decides how large an area the arm covers without repositioning the part and whether it reaches all points at the right angle.
Repeatability
How precisely the arm returns to the same point in a repeated move (e.g. ±0.02 mm). In repeatable tasks it matters more than absolute accuracy.
Number of axes (6)
6 rotary axes let you position the tool at almost any angle - important for welds, access to the part and difficult geometries.
TCP speed
The maximum speed of the tool centre point. It affects cycle time, but the real speed depends on the process and safety requirements.
IP rating
Resistance to dust and moisture. The FR series is IP54, optionally IP65 - important in dusty and humid workshops and during welding.
Mounting and base
The arm can be mounted on the floor, wall or ceiling. A small footprint makes integration easier in a tight cell without rebuilding it.
Payload–reach curve
The arm usually holds its full payload at a shorter extension. At maximum reach the permissible mass of tool plus part may be lower - which is why we select for the specific task.
Choosing a model
How to match an FR model to the task
A model is not chosen by its name. The order is the reverse: first the tool and the task, then mass and reach, and finally a specific FR model as the base of the WS cobot.
Send your process for assessment 1
1
Start with the tool
First define the working tool: torch with equipment, gripper, suction cup, sensor. It determines the rest of the selection.
2
2
Calculate the total mass
The payload must cover tool + part + cables, with a margin. That is why a 3 kg task often gets an arm with a higher payload.
3
3
Define the working reach
Measure the farthest and nearest working points and the angles at which the tool has to approach the part.
4
4
Check space and mounting
Footprint, operator access, wall or ceiling mounting options and possible collisions with the surroundings.
5
5
Match repeatability and environment
The higher the quality requirements, the more repeatability matters. Dust and moisture decide the IP rating.
In the end it is the whole WS cobot that counts - which is why we confirm the model selection after a process analysis, not from the parameter table alone.
Arm capabilities
What the bare Fairino FR arm can do
These are the capabilities of the base alone - programming, communication and safety. A WS cobot adds the tool, plugins that simplify operation and a full deployment.
Programming and control
10.1" touch panel or WebApp from a computer or tablet, hand-guided programming and SDKs: Python, C++, C#, Java, ROS and ROS 2.
Communication and integration
Modbus TCP/RTU, TCP/IP and digital inputs/outputs, and with an expansion card also Profinet, EtherNet/IP and CC-Link. EtherCAT architecture internally.
Safety and standards
A collaborative arm with joint sensors, force limiting and emergency stop. CE certificate, compliance with ISO 10218-1 and ISO/TS 15066, IP54 (IP65 option). Whether guarding is needed is decided by the cell assessment.
Data on the Fairino FR arm is for information only (source: Fairino materials). Welderstal is a Fairino cobot distributor and integrates them into WS cobots and ready-made kits.
FAQ
Frequently asked questions about Fairino FR cobot arms
What is a cobot, i.e. a collaborative arm? +
A cobot is a robot designed to work alongside people. It has sensors in its joints and force limiting, so it stops moving on contact. The arm alone is a technical base - a cell comes into being only with a tool, equipment and configuration.
Can I buy a bare FR arm without the whole kit? +
We advise in the form of a Welderstal WS kit, because an arm on its own does not do any work without a tool, configuration and a safety assessment. We match the scope of the kit - from full deployment to narrower integration - after a process description.
How many axes does an FR arm have and what does that give? +
FR models have 6 rotary axes. This lets you position the tool at almost any angle and reach difficult spots - important when welding seams with complex geometry and when handling parts.
How is a Fairino FR arm programmed? +
Programming is done via the 10.1" touch panel or the WebApp from a computer or tablet, and also by hand guiding (the operator shows the path). For integration there are SDKs in Python, C++, C#, Java, plus ROS and ROS 2.
Which communication protocols does the FR support? +
As standard Modbus TCP/RTU, TCP/IP and digital inputs/outputs. With an expansion card, Profinet, EtherNet/IP and CC-Link are added. This makes integration with the welding power source, PLC and the rest of the line easier.
Is the FR arm safe and which certificates does it have? +
The FR series are collaborative arms with joint sensors, force limiting and emergency stop, with a CE certificate and compliance with ISO 10218-1 and ISO/TS 15066. The protection rating is IP54 (IP65 optional). Whether the cell can work without guarding is determined after assessing the whole cell.
What is the difference between nominal and maximum payload? +
Nominal payload is the safe mass for typical work and maximum is the upper limit. In addition, full payload is usually held at a shorter extension - at maximum reach the permissible mass may be lower (payload–reach curve). Remember that the tool also counts towards the mass.
How does an FR arm differ from a Welderstal WS kit? +
The FR is the cobot arm alone - a technical base. A WS cobot is a commissioned cell built on that base: FR model selection, tool, equipment, Welderstal plugins, configuration, safety assessment, commissioning, training and support after start-up.
From a bare arm to a ready-made cell
Buy a Fairino arm as a Welderstal WS cobot
A complete WS cobot is a deployment: a selected Fairino FR arm, tool, equipment, Welderstal plugins, configuration, commissioning, training and support. Describe your process and we will select the model and deployment scope.