UR5e vs RealMan RM75-B: 5 kg Cobot Comparison of Axes, Reach and Weight
Updated: 9 hours ago
IN A NUTSHELL
🔎 THE KEY DIFFERENCE Both are compared at 5 kg. Universal Robots UR5e has the longer stated reach, which may help reach separated fixtures; it does not guarantee access at every tool angle. Universal Robots UR5e has 6 axes, compared with 7 axes for RealMan RM75-B. |
→ CONSIDER Universal Robots UR5e Consider it when extra reach is useful while the compared load capacity is the same. This article compares 5 kg with a published reach of 850 mm; include the gripper and part in the load. |
→ CONSIDER RealMan RM75-B Consider it when its stated load and reach already cover your task and its controls fit your equipment. This article compares 5 kg with a published reach of 610 mm; include the gripper and part in the load. |
💡 THE TAKEAWAY Check the required tool angles and approach path: different axis counts change movement options. Choose only after both suppliers demonstrate the loaded task and quote the same complete installation. |
The Universal Robots UR5e and the RealMan RM75-B both carry 5 kg. The UR5e reaches 240 mm further, repeats more tightly and is fully industrial. The RM75-B adds a seventh axis, weighs 7.8 kg with its controller in the base and costs about 33% less.
Quick verdict. The UR5e is the better choice for production cells, with 850 mm reach, ±0.03 mm repeatability and a full industrial feature set. The RealMan RM75-B is the better choice for mobile, humanoid and research platforms that need redundant motion, with 7 axes, a 7.8 kg arm and a listed price about 33% lower.
UR5e and RealMan RM75-B at a glance
The UR5e carries 5 kg over 850 mm, repeats to ±0.03 mm and weighs 20.6 kg.
The RealMan RM75-B carries 5 kg over 610 mm with 7 axes, repeats to ±0.05 mm and weighs 7.8 kg with the controller inside its base.
Main specification comparison
Specification | Universal Robots UR5e | RealMan RM75-B |
Brand | Universal Robots | RealMan |
Listed price | $35,000 | $23,550 |
Payload | 5 kg | 5 kg |
Reach | 850 mm | 610 mm |
Repeatability | ±0.03 mm | ±0.05 mm |
Axes | 6 | 7 |
Speed | 180°/s maximum joint speed on all six joints | TCP up to 1.8 m/s; joints 1-2: 180°/s; joints 3-7: 225°/s |
Arm weight | 20.6 kg | 7.8 kg |
IP rating | IP54 | Not specified |
Controller | UR control box CB 5.2 / CB 5.5 | Integrated in the robot base |
Price comparison
UR5e: listed from $35,000
RealMan RM75-B: listed from $23,550
Difference: $11,450
The RM75-B costs roughly 33% less
Reach and precision
Both arms carry 5 kg. The UR5e reaches 850 mm, 240 mm more, and publishes ±0.03 mm repeatability against ±0.05 mm. Machine tending and packaging over a full workstation favor the UR5e.
Axes, weight and power
The RM75-B's seventh, redundant axis lets it reach around obstacles while holding the tool orientation. It weighs 7.8 kg, about 12.8 kg less than the UR5e, runs from 24 V DC at a typical 200 W and houses its controller in a 107 mm base.
Industrial features
The UR5e has a built-in 50 N / 10 Nm force/torque sensor, 17 configurable safety functions, IP54 and PROFINET with PROFIsafe, EtherNet/IP, Modbus TCP and ROS/ROS2, with UR+ accessories. RealMan publishes a 1.8 m/s tool speed for the RM75-B.
Best applications for the UR5e
Machine tending up to 5 kg
Force-controlled screwdriving
Packaging and kitting
Best applications for the RealMan RM75-B
Humanoid and mobile manipulation
Research needing redundant motion
Battery-powered platforms
UR5e advantages
850 mm reach
±0.03 mm repeatability
Full industrial feature set
UR5e limitations
About $11,450 higher listed price
6 axes
RealMan RM75-B advantages
7 axes
7.8 kg arm with integrated controller
About 33% lower listed price
RealMan RM75-B limitations
610 mm reach
±0.05 mm repeatability
Final verdict
Choose the UR5e for production cells. Choose the RealMan RM75-B for redundant motion on mobile and humanoid platforms.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR5e or the RealMan RM75-B?
The RM75-B is listed from $23,550 and the UR5e from $35,000, a difference of $11,450.
Do both robots carry 5 kg?
Yes. Both are rated for 5 kg.
How many axes do they have?
The RM75-B has 7 axes and the UR5e 6.
Which robot has the longer reach?
The UR5e reaches 850 mm and the RM75-B 610 mm.
Which robot is lighter?
The RM75-B weighs 7.8 kg and the UR5e 20.6 kg.
Which robot should I buy?
Choose the UR5e for production. Choose the RM75-B for mobile platforms.
