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Brand: Universal Robots
Universal Robots UR3e 3 kg Collaborative Robot Arm
Description
A compact 3 kg cobot with an endlessly rotating wrist
The Universal Robots UR3e is the smallest arm in the UR family: a six-joint collaborative robot with a 3 kg payload and 500 mm reach on a 128 mm base, weighing 11.2 kg with its arm cable. Every joint turns 360 degrees in either direction and the last wrist joint rotates without limit, which suits continuous screwdriving, dispensing and polishing where an arm that has to unwind would waste cycle time.
It is built for benches and compact cells. Any mounting orientation is allowed, noise stays under 60 dB(A) and the maximum power draw is only 300 W, so the arm fits assembly stations, laboratory set-ups and machine-side positions that a larger cobot would crowd.
Technical specifications
| Parameter | Specification |
|---|---|
| Payload | 3 kg (6.6 lbs) |
| Reach | 500 mm (19.7 in) |
| Joints | 6 rotating joints; all travel 360 degrees each way, wrist 3 unlimited |
| Pose repeatability, ISO 9283 | 0.03 mm either direction |
| Maximum TCP speed | 3 m/s |
| Joint speed limits | 180 degrees/s at base, shoulder and elbow; 360 degrees/s at the three wrist joints |
| Tool-flange force/torque sensor | 30 N and 10 Nm range; 2.0 N and 0.1 Nm precision; 3.5 N and 0.1 Nm accuracy |
| Power draw | 300 W maximum |
| Protection and noise | IP54; under 60 dB(A) |
| Footprint and weight | Base 128 mm; 11.2 kg with 6 m arm cable |
| Tool flange | EN ISO 9409-1-50-4-M6 |
Safety, tool interface and controller
Universal Robots documents 23 configurable safety functions and lists compliance with EN ISO 13849-1 (PLd Category 3) and EN ISO 10218-1. The arm runs from 0 to 50 degrees C at up to 90% RH without condensation.
At the flange, an M8 8-pin female connector carries 12 or 24 V (600 mA), two digital I/O points and either two analog inputs or an RS-485 link, so a gripper, screwdriver or small sensor connects with one short cable.
The arm works with a control box and a teach pendant running PolyScope on a 12-inch touchscreen, 1280 x 800 pixels, IP54. The control box offers 16 digital inputs and 16 outputs, two analog inputs and two outputs and four quadrature inputs, plus Modbus TCP, EtherNet/IP, PROFINET and PROFIsafe.
A 3 kg arm suits a light tool such as a small screwdriver, a dispensing head or a compact gripper. Add the weight of every item mounted on the flange, including cables and brackets, before checking the 3 kg limit.
Universal Robots cobot models compared
The UR3e is the lightest of six current UR arms. Universal Robots also lists a UR3e-540, which pairs the same arm with the CB7 controller and TP7 Core pendant and states a 540 mm reach; confirm which controller generation your project needs.
| Model | Payload | Reach |
|---|---|---|
| UR3e | 3 kg | 500 mm |
| UR7e | 7.5 kg | 850 mm |
| UR12e | 12.5 kg | 1300 mm |
| UR16e | 16 kg | 900 mm |
| UR20 | 20 kg | 1750 mm |
| UR30 | 30 kg | 1300 mm |
Documents and quotation
The attached file is the one-page UR3e technical specification from the manufacturer. Before ordering, confirm the controller generation, the tool or gripper and its power demand, the mounting position and the supply at the control box. The arm is listed in our robotics category; please state quantity and delivery location with the request.
Datasheets & Documents
- Datasheet Universal Robots UR3e technical data sheet (1 page) Download
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About brand
Universal Robots is a Danish manufacturer of collaborative robots (cobots), founded in 2005 and headquartered in Odense, and part of Teradyne Robotics. Seven Star LLC, an independent supplier in Muscat, quotes Universal Robots cobot arms for machine tending, palletizing, screwdriving, welding and assembly cells.
Collaborative robot arms from 3 kg to 30 kg payload
The Universal Robots range covers six-joint arms from the 3 kg UR3e to the 30 kg UR30, programmed on a touchscreen teach pendant with the PolyScope software. Each catalogue page links the manufacturer data sheet, so payload, reach, weight and protection rating can be compared before a quotation is issued.
Typical cobot applications
Machine tending, material handling, palletizing, screwdriving, welding and assembly are application areas named for these arms. Final suitability depends on the tooling, the workpiece and the risk assessment of the complete cell.
Ordering Universal Robots products
Send the arm model, controller generation if known, tooling, quantity and delivery location with the inquiry, so the matching version can be checked against its data sheet before a quotation is issued.
Related products
Frequently Asked Questions
What payload and reach does the UR3e have?
The data sheet gives a 3 kg payload and a 500 mm reach.
Does the last joint rotate without limit?
Yes. Wrist 3 has an infinite working range and the other joints travel 360 degrees each way.
What is the repeatability?
Pose repeatability per ISO 9283 is plus or minus 0.03 mm.
What protection rating does it have?
The arm and the teach pendant are IP54; the control box is IP44.
Which protocols does the controller support?
Modbus TCP, EtherNet/IP adapter, PROFINET device with PROFIsafe, and ROS/ROS2.
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