Universal Robots UR18 Collaborative Robot Arm — 18 kg Payload, 950 mm Reach

Universal Robots UR Series  |  Collaborative Robot

Strength and Agility. Heavy Payload. Compact Reach.

18 kg Payload. Compact Footprint. Built for Fast-Paced Heavy Automation.

The UR18 combines strength and agility in one of the most compact heavy-payload cobots available. With an 18 kg payload, 950 mm reach, and speeds up to 4 m/s, it is purpose-built for fast-paced pick-and-place, palletizing, machine tending, and welding deployments where reducing cycle times is the primary goal — and where payload headroom over the UR16e is the constraint that matters.

At 39.2 kg arm weight with a Ø204 mm footprint, the UR18 is light enough for easy mounting on most standard gantry systems and compact enough to deploy in existing cells without major structural changes. Its IP65 arm rating makes it suitable for demanding industrial environments, and its 2-1-3 joint architecture delivers the reach envelope and agility needed for high-throughput production cycles.

The UR18 is available on both PolyScope 5 and PolyScope X platforms, making it compatible with existing UR fleets and future deployments alike. It is compliant with EN ISO 13849-1 (PLd Category 3), EN ISO 10218-1, and UL 1740, with 21 configurable safety functions across all variants.

At a Glance

Why the UR18

18 kg in a Compact Body
The UR18 delivers the highest payload of any cobot in its footprint class. At Ø204 mm — the same base diameter as the UR15 — it fits into existing cell layouts designed for lighter cobots, without requiring a larger base, a bigger control enclosure, or significant structural changes to the mounting surface.

Built for Fast-Paced Pick-and-Place
With 4 m/s maximum TCP speed and 18 kg payload, the UR18 handles high-throughput pick, transfer, and place cycles at weights that previously required a traditional industrial robot — and the safety fencing, integration complexity, and capital cost that comes with one. For palletizing, machine tending, and heavy packaging lines, throughput-per-hour improvements are direct and measurable.

Heavy End Effectors Without Payload Penalty
Heavy grippers, multi-part tooling plates, vacuum cups with manifolds, and welding torch assemblies all consume payload before the part weight is counted. The UR18's 18 kg headroom accommodates complex end-of-arm tooling at full rated payload — without the compromises required when running a lighter cobot near its limit.

IP65 for Demanding Environments
IP65 at the arm makes the UR18 deployable in applications with wash-down requirements, coolant exposure, metal particulate, and other environmental factors that degrade lighter-rated cobots over time. Welding, machining, food processing, and other harsh-environment applications all benefit from the higher IP classification.

PolyScope 5 and PolyScope X — Both Available
The UR18 supports both software platforms, giving buyers the choice of joining an existing PS5 fleet for consistency or deploying on PolyScope X for next-generation capabilities including OptiMove motion control, AI-readiness, and browser-based offline programming.

Eliminate Ergonomic Injury Risk
Heavy repetitive lifting over 18 kg is among the highest-risk manual handling tasks in manufacturing. The UR18 removes those tasks from your workforce permanently — reducing injury claims, downtime, and turnover while improving throughput consistency across all shifts.

Common Applications

The UR18 targets the upper end of collaborative automation — tasks where 16 kg is not enough payload headroom and where the UR20's additional reach is not required. It is the right cobot when heavy end effectors, multi-part grippers, or consistently heavy parts push a UR16e past its practical operating range.

Palletizing
18 kg payload handles standard case weights plus the gripper and tooling plate — covering the majority of palletizing configurations where a UR16e runs at or near its practical limit. At 4 m/s TCP speed, the UR18 delivers cycle times that make palletizing ROI calculations straightforward. IP65 rating makes it equally deployable in food, beverage, and pharmaceutical environments where wash-down or contamination control is a production requirement.

Welding
Heavy MIG and TIG torch assemblies, wire feeders, and multi-fixture tooling all consume payload before the weld begins. The UR18's 18 kg headroom supports complex welding end effectors at full rated capacity — without the speed and reach trade-offs required when running a lighter cobot near its limit. Consistent torch positioning at ±0.05 mm repeatability delivers weld quality that manual or inconsistent robotic processes cannot match.

CNC Machine Tending
Heavy fixtures, dual-part grippers, and large machined components routinely exceed 16 kg when gripper weight is included. The UR18 handles these load/unload cycles at full payload — with the embedded wrist force/torque sensor confirming part seating before the CNC cycle starts, eliminating mis-load scrap events. 950 mm reach accesses most CNC enclosure interiors without requiring the robot to be positioned awkwardly close to the machine door.

Heavy Material Handling
Transfer and positioning of heavy castings, forgings, fabricated components, and large sub-assemblies between workstations — eliminating repetitive heavy lifting injuries while improving throughput consistency across all shifts.

Injection Moulding / Press Tending
Extracting heavy moulded parts, loading heavy inserts, and tending large stamping or hydraulic presses. The SPI AN-146 / Euromap-67 interface is available on OEM control box variants for direct injection moulding machine integration.

Screw Driving & Fastening
Heavy torque tooling on large assembly operations — automotive, appliance, and industrial equipment manufacturing — where torque reaction forces and tool weight combine to push lighter cobots past their limits.

Dispensing & Sanding / Polishing
Heavy dispensing heads and abrasive tooling for adhesive, sealant, and surface finishing applications on large or heavy components — with force-controlled contact via the integrated wrist sensor and configurable OptiMove motion profiles on PolyScope X variants.

Collaborative & Safe at Heavy Payload

The UR18 is built on Universal Robots' collaborative safety architecture — 21 configurable safety functions, an integrated wrist force/torque sensor, and full compliance with EN ISO 13849-1 (PLd Category 3), EN ISO 10218-1, and UL 1740. At 18 kg payload, the UR18 can operate in shared workspaces with appropriate risk assessment and safety configuration in place — subject to the site-specific risk assessment required for all cobot deployments under ISO/TS 15066 regardless of payload class.

UR18 vs. UR Series — Where It Fits

The UR18 sits between the UR16e and the UR20 — delivering more payload than any compact-footprint cobot in the lineup, at a reach that serves machine tending, palletizing, welding, and press tending without needing the UR20's longer arm.

If payload headroom and IP65 are the constraints — the UR18 is the right choice. If long reach at heavy payload is the requirement, step up to the UR20. Contact Automation Distribution to discuss your application: 1-888-600-3080.

Software Platforms

The UR18 is available with both PolyScope 5 and PolyScope X. Both platforms run on the same robot arm — the difference is the controller generation, software capabilities, and available cable lengths.

Full Technical Specifications

Robot Arm

Force Sensing — Tool Flange / Torque Sensor

Axis Movement

I/O — Tool Flange

I/O — Control Box

3-Position Enabling Teach Pendant (SKU 200648, 201181, 201231)

UR18 — Choose Your Configuration

The UR18 is available in nine configurations across two software platforms. Every variant uses the same robot arm — differences are in software platform, teach pendant, controller power type, and cable length.

Not sure which SKU to order?

• Expanding an existing PolyScope 5 fleet? → Choose SKU 200648 (PS5, 3PE TP, 6m)
• New PolyScope X deployment with enabling device required? → Choose SKU 201181 (PSX, 3PE TP, 6m) or 201231 (PSX, 3PE TP, 12m)
• Custom machine or injection moulding cell (AC power)? → Choose SKU 201178 (PSX OEM AC, 6m) or 201230 (PSX OEM AC, 12m)
• Mobile platform or DC-powered system? → Choose SKU 201177 (PSX OEM DC, 6m) or 201227 (PSX OEM DC, 12m)
• PS5 OEM fixed install? → Choose SKU 201174 (PS5 OEM AC) or 201173 (PS5 OEM DC)

All variants ship with the UR18 robot arm and the specified cable length. OEM variants include the SPI AN-146 / Euromap-67 injection moulding machine interface. Contact Automation Distribution to confirm availability and lead times: 1-888-600-3080.

Training & Support

UR Academy
Free online training with step-by-step programming tutorials, troubleshooting guides, and certification courses for both PolyScope 5 and PolyScope X. New users are typically productive within a single day.

UR Care Services
24/7 support, remote connectivity monitoring, and on-site field service. UR Care and UR Care Premium warranty extensions are available for the UR18 — contact Automation Distribution for pricing.

UR+ Marketplace
Certified third-party plugins and accessories — heavy-duty grippers, force/torque sensors, vision systems, welding packages, and more — all validated for UR Series compatibility.

Resources & Downloads

• → UR18 Official Product Page — universal-robots.com
• → UR18 User Manual — PolyScope 5 — universal-robots.com/manuals
• → UR18 User Manual — PolyScope X — universal-robots.com/manuals
• → UR18 Safety Functions Table — PolyScope 5 — universal-robots.com/manuals
• → UR18 Safety Functions Table — PolyScope X — universal-robots.com/manuals
• → UR Academy — Free Training & Certification
• → UR+ Marketplace — Certified Grippers, Vision & URCaps
• → UR Care Services

UR18 Product Family | SKU 200648, 201173, 201174, 201177, 201178, 201227, 201230, 201181, 201231. Specifications sourced from Universal Robots UR18 Technical Specification (April 2026). Verify all specifications against current Universal Robots documentation prior to installation. Specifications subject to change without notice. Automation Distribution — Authorized Universal Robots Distributor, Hatfield, PA.