KUKA
KR 6 R1840-2 arc HW
Compact hollow-wrist continuous-path robot from KUKA's KR CYBERTECH nano ARC family, built for arc welding and adhesive/sealant application with a 6 kg payload and 1843 mm reach.
Full specifications
Performance
How much it lifts, how far it reaches, how precisely it repeats.
- Payload
Maximum mass the robot can carry at the wrist flange, including the gripper/tool. Higher means it can handle heavier parts.
- 6 kg 0th pct in class
- Reach
Maximum horizontal distance from the base axis to the wrist — defines the size of the work area. Higher means a larger envelope.
- 1,843 mm 44th pct in class
- Repeatability
How close the robot returns to the same taught point on repeated tries (ISO 9283, ±). Lower is better — tighter precision.
- 0.04 mm 11th pct in class
- Axes (DOF)
Number of independently driven joints / degrees of freedom. 6 is standard for articulated arms; 4 for SCARA/palletizers; 7 adds elbow redundancy.
- 6
Physical
Size, mass and how it mounts.
- Robot weight
Mass of the manipulator (arm) without controller. Lighter eases mounting and mobile use; heavier often means stiffer/higher payload.
- 175 kg
- Mounting
Orientations the robot can be installed in (floor, ceiling/inverted, wall, tilted, mobile base).
- floor, ceiling, wall, angle
Environment
Conditions it can operate in — dust, water, temperature, cleanliness.
- IP rating (arm)
Ingress protection of the body against dust/water (IEC 60529). First digit = dust, second = water. Higher resists harsher environments.
- IP54 0th pct in class
- IP rating (wrist)
Ingress protection at the wrist, often higher than the body for wet/washdown duty.
- IP65 0th pct in class
Safety
Standards met and collaborative-operation capability.
- Collaborative
Whether the robot is designed to work safely next to people without fencing (power-and-force-limited).
- No
Control & software
Programming, languages and ecosystem.
- Programming
How the robot is taught: pendant, hand-guiding (lead-through), block/flow-chart, scripting, offline simulation.
- teach-pendant, offline-programming
Specifications sourced from KUKA official datasheet ↗. Specs last verified 2026-08-03.
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Frequently asked questions
What is the payload of the KUKA KR 6 R1840-2 arc HW? +
The KUKA KR 6 R1840-2 arc HW has a maximum payload of 6 kg.
What is the reach of the KUKA KR 6 R1840-2 arc HW? +
The KUKA KR 6 R1840-2 arc HW has a maximum reach of 1,843 mm (1.84 m).
What is the repeatability of the KUKA KR 6 R1840-2 arc HW? +
The KUKA KR 6 R1840-2 arc HW has a pose repeatability of ±0.04 mm (ISO 9283), making it highly accurate for precision work.
How many axes does the KUKA KR 6 R1840-2 arc HW have? +
The KUKA KR 6 R1840-2 arc HW is a 6-axis welding robot.
What is the KUKA KR 6 R1840-2 arc HW used for? +
The KUKA KR 6 R1840-2 arc HW is typically used for welding, adhesive-dispensing.
What controller does the KUKA KR 6 R1840-2 arc HW use? +
The KUKA KR 6 R1840-2 arc HW runs on the KR C5 / KR C5-2 controller.
What is the IP rating of the KUKA KR 6 R1840-2 arc HW? +
The KUKA KR 6 R1840-2 arc HW arm carries an IP54 ingress-protection rating.
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