UR3e vs SIASUN SCR3: 3 kg Cobot Comparison of Precision, Axes and Price
The Universal Robots UR3e and the SIASUN SCR3 both carry 3 kg. The SCR3 adds a seventh axis, reaches 100 mm further, repeats more tightly and costs about 56% less. The UR3e is a current model with documented speed, weight and protection data.
Quick verdict. The UR3e is the better choice for production cells that need long-term support, with ±0.03 mm repeatability, a 3 m/s tool speed and a built-in force/torque sensor. The SIASUN SCR3 offers 7 axes and ±0.02 mm repeatability at a much lower price, but it is no longer part of the current SIASUN range.
UR3e and SIASUN SCR3 at a glance
The UR3e carries 3 kg over 500 mm, repeats to ±0.03 mm and weighs 11.2 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 UR3e | SIASUN SCR3 |
Brand | Universal Robots | SIASUN |
Listed price | $33,800 | $15,000 |
Payload | 3 kg | 3 kg |
Reach | 500 mm | 600 mm |
Repeatability | ±0.03 mm | ±0.02 mm |
Axes | 6 | 7 |
Speed | 3 m/s maximum TCP speed | Not specified |
Arm weight | 11.2 kg | Not specified |
IP rating | IP54 | Not specified |
Price comparison
UR3e: listed from $33,800
SIASUN SCR3: listed from $15,000
Difference: $18,800
The SCR3 costs roughly 56% less
Axes and precision
The SCR3 has 7 axes, and its redundant joint lets it reach around obstacles in compact cells. SIASUN publishes ±0.02 mm repeatability against ±0.03 mm for the UR3e. It is designed for precision assembly, packaging, polishing, testing and machine loading.
Availability and support
The SCR3 is no longer part of the current SIASUN product range, so spare parts and long-term support should be checked before buying. The UR3e is a current model with the UR+ ecosystem and wide integrator support.
Speed, weight and features
Universal Robots publishes a 3 m/s maximum tool speed and an 11.2 kg arm weight for the UR3e, with a built-in ±30 N / ±10 Nm force/torque sensor, IP54 and PROFINET, EtherNet/IP, Modbus TCP and ROS/ROS2 support. The reviewed SCR3 specification does not list speed, weight or IP rating.
Best applications for the UR3e
Production benchtop assembly
Force-controlled insertion
Robots inside machines
Best applications for the SIASUN SCR3
Precision assembly in compact cells
Polishing and testing
Budget lab or pilot setups
UR3e advantages
Current model with UR+ ecosystem
Documented speed, weight and IP data
Built-in force/torque sensor
UR3e limitations
About $18,800 higher listed price
6 axes
SIASUN SCR3 advantages
7 axes and ±0.02 mm repeatability
600 mm reach
About 56% lower listed price
SIASUN SCR3 limitations
No longer in the current SIASUN range
Final verdict
Choose the UR3e for production work with long-term support. Choose the SIASUN SCR3 for precision and a seventh axis on a tight budget where availability is not critical.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR3e or the SIASUN SCR3?
The SCR3 is listed from $15,000 and the UR3e from $33,800, a difference of $18,800.
Do both robots carry 3 kg?
Yes. Both are rated for 3 kg.
Which robot is more precise?
The SCR3 publishes ±0.02 mm repeatability and the UR3e ±0.03 mm.
How many axes do they have?
The SCR3 has 7 axes and the UR3e 6.
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 UR3e for production. Choose the SCR3 for precision on a budget.
