UR5e vs SIASUN SCR3: Cobot Comparison of Payload, Precision and Price
The Universal Robots UR5e and the SIASUN SCR3 serve light automation at different scales. The UR5e carries 2 kg more and reaches 250 mm further. The SCR3 adds a seventh axis, repeats more tightly and costs about 57% less, but it has left the SIASUN range.
Quick verdict. The UR5e is the better choice for production cells, with 5 kg payload, 850 mm reach, a force/torque sensor and long-term support. The SIASUN SCR3 offers 7 axes and ±0.02 mm repeatability at a much lower price for precise light work where availability is not critical.
UR5e and SIASUN SCR3 at a glance
The UR5e carries 5 kg over 850 mm, repeats to ±0.03 mm and weighs 20.6 kg.
The SIASUN SCR3 carries 3 kg over 600 mm with 7 axes and repeats to ±0.02 mm.
Main specification comparison
Specification | Universal Robots UR5e | SIASUN SCR3 |
Brand | Universal Robots | SIASUN |
Listed price | $35,000 | $15,000 |
Payload | 5 kg | 3 kg |
Reach | 850 mm | 600 mm |
Repeatability | ±0.03 mm | ±0.02 mm |
Axes | 6 | 7 |
Speed | 180°/s maximum joint speed on all six joints | Not specified |
Arm weight | 20.6 kg | Not specified |
IP rating | IP54 | Not specified |
Price comparison
UR5e: listed from $35,000
SIASUN SCR3: listed from $15,000
Difference: $20,000
The SCR3 costs roughly 57% less
Payload and reach
The UR5e carries 5 kg, 2 kg more, and reaches 850 mm, 250 mm more than the SCR3. Machine tending and packaging with heavier grippers need the UR5e.
Axes and precision
The SCR3 has 7 axes and publishes ±0.02 mm repeatability against ±0.03 mm for the UR5e. Its redundant joint lets it reach around obstacles in compact cells for precision assembly, polishing and testing.
Availability and features
The SCR3 is no longer part of the current SIASUN product range, so spare parts and support should be checked before buying. The UR5e is a current model with a built-in 50 N / 10 Nm force/torque sensor, 17 configurable safety functions, IP54 and UR+ accessories.
Best applications for the UR5e
Machine tending up to 5 kg
Force-controlled screwdriving
Packaging and kitting
Best applications for the SIASUN SCR3
Precision assembly in compact cells
Polishing and testing
Budget lab or pilot setups
UR5e advantages
5 kg payload and 850 mm reach
Current model with UR+ ecosystem
Built-in force/torque sensor
UR5e limitations
About $20,000 higher listed price
SIASUN SCR3 advantages
7 axes and ±0.02 mm repeatability
About 57% lower listed price
SIASUN SCR3 limitations
3 kg payload and 600 mm reach
No longer in the current SIASUN range
Final verdict
Choose the UR5e for production work with long-term support. Choose the SIASUN SCR3 for precise light work on a tight budget.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR5e or the SIASUN SCR3?
The SCR3 is listed from $15,000 and the UR5e from $35,000, a difference of $20,000.
Which robot carries more?
The UR5e carries 5 kg and the SCR3 3 kg.
Which robot has the longer reach?
The UR5e reaches 850 mm and the SCR3 600 mm.
Which robot is more precise?
The SCR3 publishes ±0.02 mm repeatability and the UR5e ±0.03 mm.
Is the SIASUN SCR3 still in production?
The SCR3 is no longer part of the current SIASUN product range.
Which robot should I buy?
Choose the UR5e for production. Choose the SCR3 for precise light work on a budget.
