# Universal Robots UR18

Hardware · `UR18` · verification: source checked

The UR18 is a six-axis collaborative industrial robot arm from Universal Robots. It has an 18 kg payload, a 950 mm reach, and a maximum TCP speed of 4 m/s. It is programmed through a 12-inch touchscreen with the PolyScope graphical user interface and provides 23 configurable safety functions.

## Specification

| Property | Value |
|---|---|
| Category | collaborative robot |
| Axes | 6 |
| Payload | 18 kg |
| Reach | 950 mm |
| Repeatability | 0.05 mm |
| Weight | 39.2 kg |
| Max TCP speed | 4000 mm/s |
| Power consumption | 0.57 kW |
| IP rating | IP65 |
| Operating temp min | 0 °C |
| Operating temp max | 50 °C |

### Joints

| Name | Range min (°) | Range max (°) | Max speed (°/s) |
|---|---|---|---|
| Base | -360 | 360 | 180 |
| Shoulder | -360 | 360 | 180 |
| Elbow | -360 | 360 | 240 |
| Wrist 1 | -360 | 360 | 300 |
| Wrist 2 | -360 | 360 | 300 |
| Wrist 3 | -360 | 360 | 300 |

## Connected

- Manufacturer: [Universal Robots](https://machineschema.com/manufacturer/universal-robots.md)
- Protocols: [EtherNet/IP](https://machineschema.com/protocol/ethernet-ip.md), [Modbus TCP](https://machineschema.com/protocol/modbus-tcp.md), [PROFINET](https://machineschema.com/protocol/profinet.md)

## Safety

- 23 configurable safety functions are provided.
- Compliance is stated with EN ISO 13849-1 (PLd Category 3), EN ISO 10218-1 and UL 1740.
- Operating ambient temperature range is 0 to 50 °C.
- Operating humidity limit is ≤90% RH non-condensing.
- Noise level is <67 dB(A).
- The LED light ring has three default configurations to comply with ISO 10218; the user can switch the light off.
- The tool connector is described as safety-ready architecture.

## Study notes

- Joint architecture is 2-1-3.
- Force sensing at the tool flange measures force x-y-z and torque x-y-z; range ±150.0 N and ±10.0 Nm, precision ±7.5 N and ±0.2 Nm, accuracy ±8.3 N and ±0.5 Nm.
- Programming is via a 12-inch touchscreen with PolyScope graphical user interface.
- Tool flange is EN ISO 9409-1-50-4-M6; connector is M8 8-pin female; robot arm cable length is 6 m.
- Control box provides 16 digital in, 16 digital out, 2 analog in, 2 analog out and 4 quadrature digital inputs; I/O supply is 24 V, 2 A.
- Control box weight is 12 kg; dimensions are 460 x 449 x 254 mm; power source is 100-240 VAC, 47-440 Hz.
- Control box is IP44; teach pendant is IP54.
- Teach pendant display resolution is 1280 x 800 pixels; cable length is 4.5 m; weight is 1.8 kg including 1 m of cable.
- The control box lists PROFIsafe and ROS/ROS2 among its industrial protocols.
- Robot arm footprint is Ø204 mm.

## Sources

1. [UR18 - The compact heavy-duty cobot](https://www.universal-robots.com/products/ur18-cb5/) (accessed 2026-10-25)
2. [https://www.universal-robots.com/manuals/latest/en/datasheets/ur18/](https://www.universal-robots.com/manuals/latest/en/datasheets/ur18/) (accessed 2026-10-25)

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