Universal Robots' UR20 represents a step change in what a collaborative robot can lift and reach. While the UR5e and UR10e handle the majority of UK cobot deployments -- assembly, machine tending, light pick-and-place -- the UR20 opens up palletising, heavy machine tending, and large-component assembly to the cobot model without requiring full industrial safety fencing from day one.
Launched in 2022, the UR20 is younger than the e-Series range, which means used units are only recently becoming available in meaningful numbers. That creates an opportunity for buyers who move now: pricing is competitive, units tend to come from well-documented early-adopter deployments, and the UR ecosystem support infrastructure is as strong as any cobot brand in the UK.
This guide covers UR20 specifications, palletising and machine tending use cases, PolyScope 5, what to check when buying used, and how the UR20 compares to the UR16e, the UR30, and competing high-payload cobots from KUKA and FANUC.
> Quick answer: A used UR20 at £28,000 to £38,000 is the most cost-effective way to bring 20 kg collaborative payload capacity into a UK facility. The platform is well-supported by UK UR distributors and integrators. Check joint cycle counts, inspect the base and elbow joints for wear, and confirm the PolyScope version before buying. For palletising applications, compare total integration cost with the UR30 before committing.
UR20 Specifications
| Specification | Value |
|---|---|
| Payload | 20 kg |
| Maximum reach | 1,750 mm |
| Degrees of freedom | 6 |
| Repeatability | ±0.05 mm |
| Maximum TCP speed | 2.0 m/s |
| IP rating | IP65 |
| Weight | 64 kg |
| Controller | UR Control Box (CB5) |
| Interface | PolyScope 5 (PolyScope X) |
| Power supply | 200-240 V AC |
The 1,750 mm reach is the UR20's defining specification for palletising applications. A robot stacking cartons on a standard EUR pallet needs to reach from the infeed conveyor to the far corner of the pallet while lifting 20 kg -- a geometry that the UR20 satisfies without requiring complex cell layout. The IP65 rating means the arm can be cleaned down in food and beverage environments without ingress risk, which is relevant for many UK palletising deployments.
The ±0.05 mm repeatability is consistent with the broader UR e-Series range and adequate for palletising and machine tending. It is not designed for precision assembly at sub-0.1 mm tolerances -- for that, the UR5e with a force-torque sensor or a Franka FR3 is more appropriate.
Palletising with the UR20
Palletising is the UR20's primary commercial use case. The economics are compelling: a palletising cell built around a UR20 typically costs £60,000 to £90,000 fully integrated, against a manual operator cost of £25,000 to £35,000 per year including on-costs. Payback periods of two to four years are common in UK food, beverage, and consumer goods facilities.
The UR20's palletising workflow is supported by Universal Robots' own PolyScope palletising wizard, which generates pallet patterns, layer definitions, and pick-and-place trajectories without manual programming. Third-party URCaps from integrators such as Robotiq, OnRobot, and Schmalz add vacuum gripper control, force sensing, and conveyor integration.
For buyers considering a used UR20 for palletising, the key integration considerations are:
- Gripper. Palletising requires a gripper designed for the specific product being handled. Vacuum grippers are standard for cartons; clamps or forks are used for sacks, trays, and irregular loads. Confirm whether the used unit comes with a configured gripper and end-of-arm tooling.
- Conveyor integration. Most palletising cells include a feed conveyor with a sensor trigger. Check whether the existing PLC interface and I/O configuration is documented with the used unit -- this significantly reduces integration time.
- Pallet programme. If the seller is a production user, request the existing PolyScope programmes and pallet definitions. These are reusable and save significant commissioning time.
Machine Tending with the UR20
The UR20's combination of 20 kg payload and 1,750 mm reach makes it suitable for loading and unloading machine tools handling large or heavy workpieces. Applications include:
- CNC machining centres processing large castings or forgings
- Press loading for sheet metal components
- Injection moulding machines with heavy tooling inserts
- Grinding and finishing for large components
In machine tending applications, the UR20's collaborative certification is particularly valuable: it allows the robot to share the machine tending area with an operator for part inspection and programme changes without requiring the full cell to be stopped. This reduces cycle interruption compared to a full industrial robot installation.
PolyScope 5
The UR20 introduced PolyScope 5, a significant update to Universal Robots' programming environment. Key changes from PolyScope 3 (which runs on the CB3 and e-Series robots):
- Revised graphical interface with a more logical programme structure
- Updated URScript interpreter
- Improved simulation and offline programming support
- Enhanced system log and diagnostics access
For buyers familiar with PolyScope 3, the core programming model is preserved -- waypoints, move commands, and conditionals work in the same way -- but the interface layout is different and some menu paths have changed. UK integrators with PolyScope experience adapt quickly, and Universal Robots provides PolyScope 5 training through its Academy platform.
URCaps (Universal Robots application add-ins) compatibility is important to check. Some URCaps designed for PolyScope 3 are not directly compatible with PolyScope 5 and require updated versions from the developer. Before buying a used UR20 with existing programmes and URCaps configurations, confirm that the specific URCaps used in those programmes have PolyScope 5 compatible versions available.
What to Inspect on a Used UR20
Joint cycle count. The UR20's six joints each have a cycle life rated for millions of cycles under normal operating conditions. Access the system log and check total joint cycle counts for each joint. Universal Robots considers joint replacement advisable above approximately 15 to 20 million cycles, though actual wear varies with load profile and operating environment.
Joint health. With the robot powered, run a slow sweep through the full range of motion of each joint. The joints should move smoothly with no grinding, clicking, or irregular resistance. The UR20's heavier joints make any bearing wear more perceptible than on lighter UR models.
Base and elbow joints. Joints 1 (base rotation) and 3 (elbow) carry the highest mechanical loads in palletising applications. For a unit used in palletising, inspect these joints with particular care. If the seller can provide load profiles showing the percentage of time the robot operated at or near full payload, this helps interpret wear relative to hours.
Wrist joints. Check the three wrist joints (4, 5, 6) for smooth operation. Backlash in the wrist joints is detectable by gently attempting to rotate the wrist by hand with the robot braked -- any perceptible play indicates wear.
Controller. Inspect the CB5 controller for physical damage, check that the PolyScope interface loads and responds correctly, and verify that no persistent error states are present. Check the fan operation -- overheating from blocked fans is a common cause of controller failures in dusty production environments.
Teach pendant. The PolyScope 5 teach pendant uses a touchscreen. Check for screen responsiveness across the full touch surface and inspect the cable for damage near the connector.
IP65 sealing. The UR20 is IP65 rated. If the unit was deployed in a food or beverage environment involving regular washdown, check all seals, particularly at the joint housings and tool flange. Confirm no signs of moisture ingress at the electrical connectors.
UR20 vs UR16e vs UR30
| Feature | UR20 | UR16e | UR30 |
|---|---|---|---|
| Payload | 20 kg | 16 kg | 30 kg |
| Reach | 1,750 mm | 900 mm | 1,300 mm |
| IP rating | IP65 | IP54 | IP54 |
| Interface | PolyScope 5 | PolyScope 3 | PolyScope 5 |
| New price (approx.) | £55,000-£65,000 | £38,000-£45,000 | £75,000-£85,000 |
| Used price (UK) | £28,000-£38,000 | £18,000-£28,000 | Limited |
UR16e is the right choice when payload does not exceed 16 kg and reach does not need to exceed 900 mm. Its lower cost, PolyScope 3 compatibility, and smaller footprint make it preferable for machine tending of medium-weight components. For palletising, the UR16e's 900 mm reach is a significant constraint.
UR30 raises payload to 30 kg and is the choice for the heaviest cobot palletising and machine tending tasks. It is newer than the UR20 and used units are not yet common. New price is approximately £75,000 to £85,000.
UR20 vs KUKA LBR iisy vs FANUC CRX-25iA
| Feature | UR20 | KUKA LBR iisy 15 | FANUC CRX-25iA |
|---|---|---|---|
| Payload | 20 kg | 15 kg | 25 kg |
| Reach | 1,750 mm | 1,100 mm | 1,889 mm |
| UK integrator network | Very large | Large | Large |
| Interface | PolyScope 5 | KUKA Sunrise | iHMI |
| New price (approx.) | £55,000-£65,000 | £45,000-£55,000 | £60,000-£70,000 |
| Used price (UK) | £28,000-£38,000 | £20,000-£30,000 | £28,000-£40,000 |
KUKA LBR iisy 15 offers similar collaborative capability at a lower payload. For buyers already operating KUKA systems, the KUKA Sunrise programming environment reduces integration complexity. For new buyers, UR's UK ecosystem -- which is larger and more accessible than KUKA's cobot network -- generally favours the UR20.
FANUC CRX-25iA has a higher payload (25 kg) and longer reach (1,889 mm), making it better suited to the heaviest palletising applications. FANUC's tablet-based iHMI is simpler than PolyScope 5 for straightforward teach-pendant programming, but the ecosystem of third-party integrations and URCaps equivalents is smaller. For buyers committed to FANUC who need collaborative capacity, the CRX-25iA is a strong option.
UK Integrators and Support
The UR20 benefits from Universal Robots' extensive UK distributor and integrator network. UR-certified integrators are available nationwide, and the UK market has some of the deepest UR expertise in Europe. Key considerations for buyers:
- Authorised distributors. Universal Robots UK authorised distributors can provide PolyScope training, URCaps support, and spare parts. For used units, confirm that the unit's serial number can be registered with UR for support access.
- Independent integrators. Hundreds of independent UK integrators have PolyScope experience. For palletising and machine tending applications, engaging a specialist integrator typically reduces commissioning time and ensures the application is correctly designed.
- Spare parts. UR spare parts -- joint modules, teach pendants, controllers -- are available in the UK through authorised distributors. Lead times are typically shorter than for less common platforms.
Finding a Used UR20 in the UK
- UR distributors. Some UR distributors handle used equipment or can refer buyers to customers selling used units.
- Production facilities. Early-adopter UK manufacturers who installed UR20 units in 2022 to 2023 may be selling as they upgrade to UR30 or change application requirements.
- Industrial auction platforms. Surplex, TTC Remarketing, and similar industrial auction platforms list UR cobots with reasonable frequency.
- Robot AutoTrader. The browse listings and resale index cover UR cobot availability in the UK. The robot database includes full UR20 specifications.
Summary
The UR20 is the most capable cobot in the UR range for high-payload palletising and machine tending, and the UK used market is beginning to offer units at prices that represent compelling value. At £28,000 to £38,000, a well-maintained UR20 gives a UK manufacturer access to 20 kg collaborative payload, 1,750 mm reach, and Universal Robots' industry-leading UK integrator ecosystem at roughly half the new equipment cost.
For buyers approaching a purchase, the critical checks are joint cycle counts, base and elbow joint condition, PolyScope 5 version and URCaps compatibility, and IP65 seal integrity. With those boxes ticked, a used UR20 is as reliable as any new cobot at a significantly lower acquisition cost.