UR3e vs ROKAE xMate SR4: Cobot Comparison of Price, Reach and Availability
The Universal Robots UR3e and the ROKAE xMate SR4 are light cobots with the same IP54 rating. The SR4 carries 1 kg more, reaches 419 mm further and costs about half as much. The UR3e is faster, lighter, publishes its repeatability and is still in production.
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 an 11.2 kg arm. The ROKAE xMate SR4 offers more reach for about half the price, but it is no longer part of the current ROKAE range.
UR3e and xMate SR4 at a glance
The UR3e carries 3 kg over 500 mm, repeats to ±0.03 mm and weighs 11.2 kg.
The ROKAE xMate SR4 carries 4 kg over 919 mm, weighs 16.5 kg and is rated IP54.
Main specification comparison
Specification | Universal Robots UR3e | ROKAE xMate SR4 |
Brand | Universal Robots | ROKAE |
Listed price | $33,800 | $16,400 |
Payload | 3 kg | 4 kg |
Reach | 500 mm | 919 mm |
Repeatability | ±0.03 mm | Not specified |
Axes | 6 | 6 |
Speed | 3 m/s maximum TCP speed | 2 m/s (tool end) |
Arm weight | 11.2 kg | 16.5 kg |
IP rating | IP54 | IP54 |
Price comparison
UR3e: listed from $33,800
ROKAE xMate SR4: listed from $16,400
Difference: $17,400
The xMate SR4 costs roughly 51% less
Payload and reach
The SR4 carries 4 kg against 3 kg and reaches 919 mm against 500 mm. Light assembly, inspection and small-part handling over a wider area favor the SR4, which mounts in any orientation.
Speed, precision and weight
Universal Robots publishes ±0.03 mm repeatability and a 3 m/s maximum tool speed for the UR3e. ROKAE publishes a 2 m/s tool-end speed for the SR4; the reviewed specification lists no repeatability figure. The UR3e weighs 11.2 kg, about 5.3 kg less.
Availability and support
The xMate SR4 is no longer part of the current ROKAE product range, so spare parts and long-term support should be checked before buying. The UR3e is a current model with a built-in ±30 N / ±10 Nm force/torque sensor and the UR+ ecosystem.
Best applications for the UR3e
Production benchtop assembly
Fast pick-and-place
Robots inside machines
Best applications for the xMate SR4
Light assembly and inspection
Small-part handling over 919 mm
Budget lab or pilot setups
UR3e advantages
Current model with UR+ ecosystem
±0.03 mm published repeatability
3 m/s maximum tool speed
UR3e limitations
About $17,400 higher listed price
500 mm reach
xMate SR4 advantages
About 51% lower listed price
4 kg payload and 919 mm reach
Any-orientation mounting
xMate SR4 limitations
No longer in the current ROKAE range
Final verdict
Choose the UR3e for production work with long-term support. Choose the ROKAE xMate SR4 for reach on a tight budget where availability is not critical.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR3e or the ROKAE xMate SR4?
The xMate SR4 is listed from $16,400 and the UR3e from $33,800, a difference of $17,400.
Which robot carries more?
The xMate SR4 carries 4 kg and the UR3e 3 kg.
Which robot has the longer reach?
The xMate SR4 reaches 919 mm and the UR3e 500 mm.
Is the ROKAE xMate SR4 still in production?
The xMate SR4 is no longer part of the current ROKAE product range.
Which robot is faster?
The UR3e publishes 3 m/s and the xMate SR4 2 m/s.
Which robot should I buy?
Choose the UR3e for production. Choose the xMate SR4 for reach on a budget.
