UR3e vs RealMan RM65-B: Lightweight Cobot Comparison of Payload and Price
Updated: 9 hours ago
IN A NUTSHELL
🔎 THE KEY DIFFERENCE RealMan RM65-B has the higher stated load capacity and longer stated reach. Those figures help shortlist it for heavier loads or wider layouts, but do not prove a faster production cycle. |
→ CONSIDER Universal Robots UR3e Consider it when its stated load and reach already cover your task and its controls fit your equipment. This article compares 3 kg with a published reach of 500 mm; include the gripper and part in the load. |
→ CONSIDER RealMan RM65-B Consider it when additional load capacity and reach matter. This article compares 5 kg with a published reach of 610 mm; include the gripper and part in the load. |
💡 THE TAKEAWAY Check the real tool, movement path and safety assessment before choosing. A collaborative label does not make every task safe without guarding; compare complete installation quotes. |
The Universal Robots UR3e and the RealMan RM65-B are light arms built for different users. The RM65-B carries 2 kg more, reaches 110 mm further, weighs 7.2 kg with the controller in its base and costs about 47% less. The UR3e is more precise, faster and fully industrial.
Quick verdict. The RealMan RM65-B is the better choice for mobile and humanoid platforms, with 5 kg payload, a 7.2 kg arm, a 24 V DC supply and a listed price about 47% lower. The UR3e is the better choice for production benchtop work, with ±0.03 mm repeatability, a 3 m/s tool speed and a built-in force/torque sensor.
UR3e and RealMan RM65-B at a glance
The UR3e carries 3 kg over 500 mm, repeats to ±0.03 mm and weighs 11.2 kg.
The RealMan RM65-B carries 5 kg over 610 mm, repeats to ±0.05 mm and weighs 7.2 kg with the controller inside its base.
Main specification comparison
Specification | Universal Robots UR3e | RealMan RM65-B |
Brand | Universal Robots | RealMan |
Listed price | $33,800 | $17,910 |
Payload | 3 kg | 5 kg |
Reach | 500 mm | 610 mm |
Repeatability | ±0.03 mm | ±0.05 mm |
Axes | 6 | 6 |
Speed | 3 m/s maximum TCP speed | TCP up to 1.8 m/s; joints 1-2: 180°/s; joints 3-6: 225°/s |
Arm weight | 11.2 kg | 7.2 kg |
IP rating | IP54 | Not specified |
Controller | UR control box CB 5.5 / CB 5.6 | Integrated in the robot base |
Price comparison
UR3e: listed from $33,800
RealMan RM65-B: listed from $17,910
Difference: $15,890
The RM65-B costs roughly 47% less
Weight and power
The RM65-B weighs only 7.2 kg, runs from 24 V DC at a typical 150 W and houses its controller in a 107 mm base. That suits mobile bases, humanoid platforms and battery-powered robots, where every kilogram and watt counts.
Payload and reach
The RM65-B carries 5 kg against 3 kg and reaches 610 mm against 500 mm. Light handling and pick-and-place with slightly heavier grippers favor the RM65-B.
Precision, speed and industrial features
The UR3e publishes ±0.03 mm repeatability and a 3 m/s maximum tool speed, against ±0.05 mm and 1.8 m/s for the RM65-B. It has a built-in ±30 N / ±10 Nm force/torque sensor, IP54 and PROFINET with PROFIsafe, EtherNet/IP, Modbus TCP and ROS/ROS2.
Best applications for the UR3e
Production benchtop assembly
Force-controlled insertion
Robots inside machines
Best applications for the RealMan RM65-B
Mobile and humanoid platforms
Battery-powered robots
Low-cost light handling
UR3e advantages
±0.03 mm repeatability
3 m/s maximum tool speed
Built-in force/torque sensor
UR3e limitations
About $15,890 higher listed price
3 kg payload
RealMan RM65-B advantages
5 kg payload
7.2 kg arm with integrated controller
About 47% lower listed price
RealMan RM65-B limitations
±0.05 mm repeatability
1.8 m/s tool speed
Final verdict
Choose the RealMan RM65-B for mobile and humanoid platforms. Choose the UR3e for precise production work.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR3e or the RealMan RM65-B?
The RM65-B is listed from $17,910 and the UR3e from $33,800, a difference of $15,890.
Which robot carries more?
The RM65-B carries 5 kg and the UR3e 3 kg.
Which robot is lighter?
The RM65-B weighs 7.2 kg and the UR3e 11.2 kg.
Which robot is more precise?
The UR3e publishes ±0.03 mm repeatability and the RM65-B ±0.05 mm.
How is the RM65-B powered?
It runs from 24 V DC at a typical 150 W, with the controller in its base.
Which robot should I buy?
Choose the RM65-B for mobile platforms. Choose the UR3e for production.
