UR20 Collaborative Robotic Arm (Manipulator)
High-speed, heavy-duty collaborative robots
UR20 Specifications
The UR20 is the longest working radius model among Universal's heavy-duty collaborative robots. Thanks to its extremely small footprint, this industrial collaborative robot can achieve automated operations in applications requiring long-distance heavy loading, with a maximum payload of 25 kg and a working radius of 1750 mm.
Scaling on demand
While payload and operating range are certainly important factors when choosing collaborative robots, other features define modern collaborative robots: ease of operation, space usage, deployment options, software features, and sustainability. The UR20 meets all these standards while boasting the longest working radius and maximum payload capacity in the entire Universal Robot lineup. The UR20 is specifically designed to meet the requirements of lifting heavy loads over long distances. At higher speeds, the UR20 is equipped with outstanding motion control to ensure smooth and precise movement. To meet your needs for automating processes in your existing workplace, the UR20 features a lightweight design, takes up a small footprint, and can be installed almost anywhere. This collaborative robot is multifunctional, helping you automate operations across a wide range of applications, from material handling to welding.
UR20 Core Features
Process validation, workstation solutions, programming and teach-in and production ramp-up support, and turnkey delivery of robot applications.
Learn more → Sales of new industrial robotsAuthorized-style sales of brand-new mainstream robots with selection support for new production lines and capacity expansion.
Learn more → Research and development of automation equipmentResearch, development, integration, and delivery of end-effectors, conveyor positioning, safety peripherals, and complete control systems.
Learn more → Research and development of algorithms and control systemsMotion planning, machine vision, and PLC/SCADA system development to address takt-time bottlenecks, accuracy, and data interconnection.
Learn more → Robot rentalShort-term rental, long-term rental and lease-to-own for in-stock models, long-term rental, and lease-to-purchase transfer, including transportation, installation, commissioning, and lease-term maintenance.
Learn more → Software and hardware upgrade servicesController retrofits, software and firmware upgrades, mechanical refurbishment, and safety upgrades restoring performance to older equipment.
Learn more → Maintenance and repairOn-site inspection, fault diagnosis and repair, and annual maintenance contracts covering 1,310 models from 21 brands.
Learn more → Used & in-stock robot salesWe buy back used robots and handle inspection, refurbishment and resale; every unit ships with inspection records and a warranty, and trade-ins can offset new purchases.
Learn more →Practical application shots
Technical diagram
Load curve and footprint.
UR Series Collaborative Robots · Series technical features
Designed for applications requiring higher loads, longer arm reaches, faster cycle times, and enhanced environmental protection, it is suitable for heavy-duty collaborative scenarios such as machine tool handling, material handling, and palletizing, while maintaining collaboration capabilities and easy integration.
The UR series geometries, combined with updated joint structures, enable robots to lift heavy payloads at speeds typically found in traditional industrial robots, freeing skilled labor from repetitive heavy tasks and allowing them to focus on higher-value tasks.
With IP65 and cleanroom certification, the UR series can be used in a wider range of environments, including harsh conditions or those with strict cleanliness standards, and can be deployed even in regulated environments.
The new joint design uses fewer but higher-quality components, reducing complexity and improving durability, providing stronger and more efficient joints with lower failure risks and years of resistance to demanding repetitive tasks.
PolyScope software is enhanced with advanced algorithms, handling heavier payloads while maintaining Austra's renowned collaborative safety standards, making programming, deployment, and management straightforward.
Shared advantages
For untrained operators, the programming process for ready-to-use collaborative robots—from unpacking, installation, to completing the first simple task—usually takes less than an hour.
Collaborative robots occupy a small footprint and are ideal for performing automated tasks within existing production spaces, where space is often limited and space utilization is ideal.
After automating tasks, each task can run autonomously without the need for continuous employee monitoring. In addition, Universal Silicon collaborative robots are more energy-efficient than traditional industrial robots.
All Universal collaborative robots feature built-in safety features, including force sensing technology and collision detection, allowing them to work alongside employees without safety barriers or guardrails, boosting productivity and creating a safe working environment.
Contents of the kit
Standard orders include a robotic arm, control box, 3PE teach pendant (with integrated 3-speed safety enable device), a power cable, a cable connecting the robotic arm and control box, and documentation. Application kits or other options are not included in the standard packaging and must be ordered separately.
A default 3-speed safety enabler (3PE teach pendant) is included, featuring industry-leading PolyScope software for controlling collaborative robots and ensuring high safety when working near them.
The standard control box weighs only 12 kilograms, can be equipped with a teach pendant, and is easy to store, suitable for any environment. The controller serves as a centralized hub for power, safety functions, and communication, providing a compact and efficient solution for system operation.
In addition to the standard warranty, access to the myUR customer portal for 24×7 technical support. It is recommended to enroll in the core training courses at Universal Academy, fully leveraging the capabilities of collaborative robots.
Applicable industries
Typical applications of this model in the following industries (click to view industry solutions).
High-speed and precise handling of larger fixtures and pallets, suitable for automation at the end of production lines and in test units.
Long-span welding, machine tool watching, and palletizing enable faster handling of heavier parts across multiple stations.
High-speed welding and CNC machine care, with a long boom providing stable movement and faster beats.
The extended reach enables rapid stacking and material handling, improving throughput and saving space.
UR20 application scenarios
This model is commonly used in the following applications.
Using collaborative robots to improve the efficiency, consistency, and reliability of palletizing operations.
View details → Machine careCollaborative robots handle loading, unloading, and monitoring operations for CNC, injection molding machines, and other equipment.
View details → Arc weldingCollaborative robots deliver consistent, high-quality, repeatable welds in welding tasks.
View details → DispensingProvides precise and repeatable fluid control in scenarios such as dispensing, laminating, and gluing.
View details → Grinding and polishingAutomating surface treatment operations improves consistency and protects operator safety.
View details → Material handlingAchieve stable and flexible material flow during component handling and loading/unloading.
View details → Subtractive manufacturingAchieve precise force control and consistency in processes such as deburring, milling, and trimming.
View details → Quality inspectionAutomated inspection, measurement, and quality analysis are completed in conjunction with vision systems.
View details → AssemblyAchieve repeatable and precise component assembly and positioning on the assembly line.
View details →
OEM systems
This model is also available as an OEM system, suitable for system integrators, OEM partners, or users who wish to create custom designs.
Unleash the full potential of your robotics team
By integrating your robot with our fully connected platform, you will be able to boost productivity, minimize downtime, and achieve efficient device group management—no matter where you are, you can conveniently accomplish all of this in the office.
Advanced motion control technology
The UR20 has been improved in software to minimize the pressure on the robotic arm and the new joint structure. Even when the reach and load reach maximum, it can maintain full-speed operation and ultra-high acceleration.
Make the most of your robot
The academy provides a series of step-by-step programming examples and tutorials for troubleshooting and repair tasks.
Learn how to set up the tool center point (TCP) and how to properly adjust payload and center of gravity.
Watch the video → Safety planeLearn how to create and configure the safety plane to prevent robots from moving outside the safe plane in normal or reduced mode, and can also trigger the reduction mode.
Watch the video → More informationVisit Universal Robots Academy to browse our popular topics and resource catalog to learn key programming points for Universal Robots.
Watch the video → Ensuring ultra-long uptimeWith Universal Care Services, you can rest assured that our commitment to excellence ensures ultra-long uptime through 24×7 support, remote connectivity, and on-site on-site service (for rapid faults/repairs).
Watch the video →Typical application scenarios
Common application processes for this model (click to view process details):
UR Series Collaborative Robots · Other models in the same series
Compare load and reach to choose the model that best suits your process.
UR20 model positioning and working condition adaptation
UR20 It belongs to the Universal Arson collaborative robot model, with a rated load of 20kg, a motion radius of 1750mm, and a repeatability of ±0.1mm. Universal's technical foundation is that it is a pioneer of collaborative robots, with the richest UR+ certification ecosystem and industry benchmarks for deployment and redeployment efficiency; The control platform is the UR control box (CB3 / e-Series), and the program ecosystem is Polyscope graphical programming + URScript.
From the perspective of working condition adaptation, the typical use for medium-duty load (20kg) positioning is:Welding, machine tool wiring, medium-sized palletizing, and die-casting part removalCommon application processes for this model include machine tool maintenance, material handling, and palletizing. The long reach (1750mm) covers multiple stations and large pallets, reducing robot movement or coordination with ground track expansion. ± 0.1mm repeatability meets handling and palletizing conditions; For precision assembly applications, it is recommended to use visual guidance for a closed-loop position. This level is the main stage for welding and loading; when selecting a positioner or dual stations, pay attention to the total cycle time and interference zone planning.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load capacity: 20kg | It is recommended to reserve a load margin of 20%–30%; Verification is made by combining end self-weight + workpiece + imbalanced load inertia, especially sensitive to high-speed conditions |
| Movement radius: 1750mm | Determine the radius of the workcell layout: bins, tooling, and fences are bounded by maximum arm span + safety distance; Verify the accessibility of each pick-and-place point during cross-station service |
| Repeatability: ±0.1mm | Repeatability ≠ absolute accuracy: Precision assembly requires external measurement closed-loop or visual guidance; Long-term accuracy trends rely on annual retest management |
| Main body weight: 64kg | Installation base and foundation load-bearing check based on weight + dynamic load; Floor slab installation requires structural calculation, with heavy-duty models serving as independent foundations |
| Controller: UR control box (CB3 / e-Series) | Decide on the process ecosystem, spare parts channels, and second-hand residual value; Currently, spare parts channels are smooth, and repair and upgrade paths are mature |
| Body weight: 64kg | Source: official UR product page |
Control systems and common failure modes
The UR control box (CB3 / e-Series) controller accompanying the UR20 uses Polyscope graphical programming + URScript programming language and development environment. Maintenance of this generation of control platforms focuses on three basic components: power, storage, and cooling—most "sudden downtime" can be detected in advance when preventive maintenance is in place.
| Failure mode | Typical performance | Disposal recommendations |
|---|---|---|
| Joint fault code | Joint fault codes (overheat/overcurrent, often related to collision history or high load rate) | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| Power box | Power supply failure | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| The teach pendant screen is aging with touch | The teach pendant screen is aging with touch | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| Terminal tool communication malfunction | Terminal tool communication abnormalities (UR+ third-party inconsistency) | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Joint health is regularly checked using official diagnostic tools | Periodically | Joint health is regularly checked using official diagnostic tools |
| Power box cooling and input voltage management | According to the manufacturer's manual cycle | Power box cooling and input voltage management |
| Program backup and version management | According to the manufacturer's manual cycle | Program backup and version management |
| Cable and drag chain inspection | every six months | Insulation, shielding, and bending radius inspection of power and encoder lines, as well as wear of cables inside the drag chain, are the main causes of intermittent faults |
| Zero point and accuracy retest | Every year | Repeatability measured by dial gauges or laser trackers, drift trend digitization—accuracy degradation can be seen six months in advance |
| Control cabinet dust removal and fans | Every quarter | Filter cleaning, fan speed and noise checks, cabinet temperature recording; Dust environments shorten the cycle |
Henghuan's service capabilities for UR20
This site is a third-party robotics technology service provider. The eight major business supports related to the UR20 are as follows (sorted by service frequency of each model):
- Maintenance and repair: For UR20's on-site diagnostics, board-level maintenance, and annual maintenance contract—including regular reading of joint health with official diagnostic tools, we follow SOPs and respond to Sichuan-Chongqing on the same day.
- Used & in-stock robot sales: There is a large circulation of second-hand products but refurbished parts are mixed in. Purchasers must check joint serial numbers and repair history. We provide full joint inspection reports; In-house UR20 or equivalent models come with a full-function test report and a 12-month warranty.
- Sales of new industrial robots: When adding new production lines or replacing entire batches, we conduct cross-brand selection comparisons based on process requirements (including models of the same class as Universal Universal), and provide configuration and pricing plans.
- Applied technology services:UR20's process programming, trajectory optimization, tap time potential, and reshaping formula management, with targeted commissioning according to machine tool maintenance, material handling, and palletizing conditions.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for UR20, with interfaces designed according to Universal flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, UR20 equivalent in-stock models can be rented, including transportation, installation, and commissioning, with flexible rental periods and flexible purchase options.
Common issues with this device
Is it easy to find UR20 spare parts?
Universal International's spare parts channels for this generation are smooth; we have in-stock or short-cycle channels for standard parts such as drivers, power modules, batteries, and teach pendant components; Joint health is monitored regularly with official diagnostic tools, and consumables are recommended to be configured according to the annual maintenance contract.
With a nominal load of 20kg, how much can it actually handle?
The rated load is the static load limit of the flange surface. In actual selection, three factors must be considered: the self-weight of the end fixture (vacuum suction cup groups or grippers often account for 2–5kg), the inertia generated by the workpiece offload (checked according to the inertia ratio when the center of gravity deviates from the flange center), and the dynamic load during high-speed movement. The conventional engineering practice is to keep the "end + workpiece" within 70%–80% of the rated value to ensure cycle time and service life.
If the equipment's accuracy deteriorates after several years of use, how can it be restored?
According to the inspection order: first check whether the zero point is drifting (common after collision or battery depletion), then perform zero calibration; Check the reducer's return error (actual measurement of forward and reverse positioning deviation; if exceeded, disassemble or replace); Then check the installation base fastening and foundation settlement; Finally, trajectory compensation parameter restructuring. Most accuracy issues can be mostly restored after calibration and maintenance, so there is no need to rush into major repairs—we first release the inspection data before deciding on the plan.
Is the used UR20 worth buying?
There is a large circulation of second-hand products, but refurbished parts are mixed in. Buyers must check joint serial numbers and repair history. We provide full joint inspection reports. Three essential items for second-hand procurement: comprehensive inspection reports (axial accuracy, driver status, insulation and battery), maintenance history and operating hours, controller generation, and software license integrity. Every used machine we sell comes with inspection records and a 12-month warranty, and we can also accept third-party inspections designated by customers.
Need technical support or procurement for this model?
Whether it's model selection comparison, installation and commissioning, or maintenance of in-use equipment, you can contact Henghuan. Tell us about your processes, loads, and equipment status, and we will provide third-party technical support and solution recommendations.
Contact Henghuan Back to the full series