UR20 vs Rainbow Robotics RB20-1900: 20 kg Long-Reach Cobot Comparison
The Universal Robots UR20 and the Rainbow Robotics RB20-1900 are 20 kg cobots built for palletizing and heavy handling. The RB20-1900 reaches 150 mm further, repeats more tightly and costs about 28% less. The UR20 is faster, lighter and rated IP65.
Quick verdict. The Rainbow Robotics RB20-1900 is the value choice for palletizing, with 1900 mm reach, ±0.05 mm repeatability and a listed price about 28% lower. The UR20 is the better choice for high-throughput and harsh-environment lines, with a 5 m/s tool speed, a 64 kg arm and IP65.
UR20 and RB20-1900 at a glance
The UR20 carries 20 kg over 1750 mm, repeats to ±0.1 mm, weighs 64 kg and is rated IP65.
The Rainbow Robotics RB20-1900 carries 20 kg over 1900 mm, repeats to ±0.05 mm and weighs 75 kg.
Main specification comparison
Specification | Universal Robots UR20 | Rainbow Robotics RB20-1900 |
Brand | Universal Robots | Rainbow Robotics |
Listed price | $72,100 | $52,100 |
Payload | 20 kg | 20 kg |
Reach | 1750 mm | 1900 mm |
Repeatability | ±0.1 mm | ±0.05 mm |
Axes | 6 | 6 |
Speed | 5 m/s maximum TCP speed | TCP 2 m/s; joint speeds: J1 to J4 120°/s, J5 and J6 180°/s |
Arm weight | 64 kg | 75 kg |
IP rating | IP65 | Not specified |
Controller | UR control box CB 5.5 / CB 5.6 | Rainbow Robotics CB06 standard robot control box |
Price comparison
UR20: listed from $72,100
Rainbow Robotics RB20-1900: listed from $52,100
Difference: $20,000
The RB20-1900 costs roughly 28% less
Reach and precision
Both arms carry 20 kg. The RB20-1900 reaches 1900 mm, 150 mm more than the UR20, which helps with taller pallet stacks and wider conveyor layouts. It also publishes ±0.05 mm repeatability against ±0.1 mm for the UR20.
Speed and throughput
Universal Robots publishes a 5 m/s maximum tool speed for the UR20. Rainbow Robotics publishes a 2 m/s TCP speed for the RB20-1900. On high-volume palletizing lines, the UR20 can shorten cycle times.
Weight, protection and certification
The UR20 weighs 64 kg, 11 kg less than the RB20-1900, and is rated IP65 and ISO Class 4 with a built-in ±200 N / ±20 Nm force/torque sensor. The RB20-1900 stands on a Ø245 mm base, mounts in any orientation and is CE, KC and TÜV SÜD certified per ISO/TS 15066.
Best applications for the UR20
High-throughput palletizing
Wet or dusty end-of-line areas
Force-controlled heavy screwdriving
Best applications for the RB20-1900
Palletizing with taller stacks
Heavy part handling over long reach
Budget-conscious palletizing lines
UR20 advantages
5 m/s speed
64 kg arm
IP65 and force/torque sensor
UR20 limitations
About $20,000 higher listed price
±0.1 mm repeatability
RB20-1900 advantages
1900 mm reach
±0.05 mm repeatability
About 28% lower listed price
RB20-1900 limitations
75 kg arm
2 m/s TCP speed
Final verdict
Choose the Rainbow Robotics RB20-1900 for reach, precision and value. Choose the UR20 for throughput, protection and a lighter arm.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR20 or the Rainbow Robotics RB20-1900?
The RB20-1900 is listed from $52,100 and the UR20 from $72,100, a difference of $20,000.
Do both robots carry 20 kg?
Yes. Both are rated for 20 kg.
Which robot has the longer reach?
The RB20-1900 reaches 1900 mm and the UR20 1750 mm.
Which robot is more precise?
The RB20-1900 publishes ±0.05 mm repeatability and the UR20 ±0.1 mm.
Which robot is faster?
The UR20 publishes 5 m/s and the RB20-1900 a 2 m/s TCP speed.
Which robot should I buy?
Choose the RB20-1900 for reach and value. Choose the UR20 for speed and protection.
