Rainbow Robotics RB20-1900 Review: Specs, Price and Applications of the 20 kg Collaborative Robot
Updated: 2 days ago

The Rainbow Robotics RB20-1900 is a 6-axis collaborative robot with a maximum payload of 20 kg, a reach of 1900 mm and ±0.05 mm repeatability, listed from USD 52,100. This review covers its full specifications, design, programming options, applications and price, so you can decide whether it fits your automation project.
Quick Verdict
The Rainbow Robotics RB20-1900 is a 6-axis collaborative robot with a payload of 20 kg, a reach of 1900 mm and a repeatability of ±0.05 mm. The arm weighs 75 kg, has a Ø245 mm base footprint and can be mounted in any orientation. Its high payload and long reach suit palletizing, heavy part handling and machine tending. The RB series is CE, KC and TÜV SÜD certified and designed for collaborative operation per ISO/TS 15066. It is listed from USD 52,100.
Rainbow Robotics RB20-1900 at a Glance
Maximum payload: 20 kg
Reach: 1900 mm
Axes: 6
Repeatability: ±0.05 mm
Speed: TCP 2 m/s; joint speeds: J1 to J4 120°/s, J5 and J6 180°/s
Weight: : 75 kg
Controller: Rainbow Robotics CB06 standard robot control box
Price: from USD 52,100
Rainbow Robotics RB20-1900 Technical Specifications
The table below lists the published specifications of the Rainbow Robotics RB20-1900.
Specification | Rainbow Robotics RB20-1900 |
Manufacturer | Rainbow Robotics |
Model | RB20-1900 |
Robot type | 6-axis collaborative robot |
Maximum payload | 20 kg |
Reach | 1900 mm |
Axes | 6 |
Repeatability | ±0.05 mm |
Speed | TCP 2 m/s; joint speeds: J1 to J4 120°/s, J5 and J6 180°/s |
Controller | Rainbow Robotics CB06 standard robot control box |
Interfaces | Ethernet (TCP/IP, Modbus TCP), EtherNet/IP, PROFINET, OPC UA, digital and analog I/O |
Certifications | CE, KC, TÜV SÜD certified, collaborative operation per ISO/TS 15066 |
Starting price | From USD 52,100 |
Detailed Technical Data
Weight: 75 kg
Base footprint: Ø245 mm
Mounting: any orientation
Axes: 6
Design and Build Quality

The RB20-1900 is a 6-axis collaborative robot made by Rainbow Robotics. Published build data: Weight: 75 kg; mounting: any orientation.
Programming and Software
Controller and Software
Published controller for the RB20-1900: Rainbow Robotics CB06 standard robot control box. Programming interfaces, software licences and simulation tools vary by package, so confirm what is included before ordering.
Industrial Communication
Published interfaces are Ethernet (TCP/IP, Modbus TCP), EtherNet/IP, PROFINET, OPC UA, digital and analog I/O.
Rainbow Robotics RB20-1900 Applications and Use Cases
Typical applications for the RB20-1900 are machine tending, assembly, inspection, education, research, packaging and dispensing.
Machine tending

The RB20-1900 loads and unloads machine tools, presses and moulding machines within its 1900 mm reach.
Assembly
Repeatability of ±0.05 mm supports fitting, inserting and fastening parts in assembly cells.
Inspection
The RB20-1900 presents parts to cameras and gauges, or carries the sensor to the part.
Rainbow Robotics RB20-1900 Price and Value
The Rainbow Robotics RB20-1900 is listed from USD 52,100 on All Things Cobots. The controller, end effectors, safety equipment and integration affect the final price and are quoted separately. Prices are indicative, are not final and may change.
Pros and Cons
Pros
20 kg maximum payload with a 1900 mm reach
±0.05 mm repeatability
Speed: TCP 2 m/s; joint speeds: J1 to J4 120°/s, J5 and J6 180°/s
Collaborative design for work near people, subject to a risk assessment
Cons
The 20 kg maximum payload includes the end effector
End effectors, safety equipment and integration are quoted separately
Who Should Buy the Rainbow Robotics RB20-1900?
The Rainbow Robotics RB20-1900 fits manufacturers that want a robot working near people without full fencing, subject to a risk assessment.
See the full Rainbow Robotics RB20-1900 product listing on All Things Cobots.
Rainbow Robotics RB20-1900 FAQ
How much does the Rainbow Robotics RB20-1900 cost?
The Rainbow Robotics RB20-1900 is listed from USD 52,100 on All Things Cobots. The price is indicative and may change, and it does not include end effectors, safety equipment or integration.
What is the payload and reach of the Rainbow Robotics RB20-1900?
The RB20-1900 has a maximum payload of 20 kg and a reach of 1900 mm.
How accurate is the Rainbow Robotics RB20-1900?
Its published repeatability is ±0.05 mm.
How many axes does the Rainbow Robotics RB20-1900 have?
The RB20-1900 has 6 axes.
How is the Rainbow Robotics RB20-1900 programmed?
Programming is done with Rainbow Robotics's own software. Confirm the included interfaces and SDKs with the supplier.
Which controller does the Rainbow Robotics RB20-1900 use?
Published controller: Rainbow Robotics CB06 standard robot control box.
How much does the Rainbow Robotics RB20-1900 weigh?
Published weight: 75 kg.
How can the Rainbow Robotics RB20-1900 be mounted?
Published installation options: : any orientation.
Is the Rainbow Robotics RB20-1900 a collaborative robot?
Yes. The RB20-1900 is a collaborative robot. Every collaborative application still needs its own risk assessment.
What is the Rainbow Robotics RB20-1900 used for?
Typical applications are machine tending, assembly, inspection, education, research, packaging and dispensing.
Specifications and prices are based on manufacturer and distributor information. Prices are indicative, are not final and may change.





