UR3e vs Kassow Robots KR1805: Compact vs Long-Reach Cobot Comparison
The Universal Robots UR3e and the Kassow Robots KR1805 sit at opposite ends of the reach scale. The KR1805 reaches 1800 mm with 7 axes and carries 2 kg more. The UR3e is the compact, precise benchtop arm and costs about 30% less.
Quick verdict. The Kassow Robots KR1805 is the better choice for long-reach tasks, with 1800 mm reach, 7 axes and 5 kg payload. The UR3e is the better choice for compact benchtop and in-machine cells, with ±0.03 mm repeatability, an 11.2 kg arm and a listed price about 30% lower.
UR3e and Kassow KR1805 at a glance
The UR3e carries 3 kg over 500 mm, repeats to ±0.03 mm and weighs 11.2 kg.
The Kassow Robots KR1805 carries 5 kg over 1800 mm with 7 axes, repeats to ±0.04 mm and is rated IP54.
Main specification comparison
Specification | Universal Robots UR3e | Kassow Robots KR1805 |
Brand | Universal Robots | Kassow Robots |
Listed price | $33,800 | $48,100 |
Payload | 3 kg | 5 kg |
Reach | 500 mm | 1800 mm |
Repeatability | ±0.03 mm | ±0.04 mm |
Axes | 6 | 7 |
Speed | 3 m/s maximum TCP speed | up to 225 deg/s |
Arm weight | 11.2 kg | Not specified |
IP rating | IP54 | IP54 |
Price comparison
UR3e: listed from $33,800
Kassow Robots KR1805: listed from $48,100
Difference: $14,300
The UR3e costs roughly 30% less
Reach and axes
The KR1805 reaches 1800 mm, more than three times the UR3e's 500 mm, and its seventh axis lets it reach around obstacles. Long-reach machine tending, light palletizing, dispensing and inspection of large parts favor the KR1805.
Precision and payload
The UR3e publishes ±0.03 mm repeatability against ±0.04 mm for the KR1805. The KR1805 carries 5 kg against 3 kg. Both arms are rated IP54, and the KR1805 mounts on a 160 × 160 mm footprint.
Weight, speed and sensing
The UR3e weighs 11.2 kg, publishes a 3 m/s maximum tool speed and has a built-in ±30 N / ±10 Nm force/torque sensor. It suits benches, light frames and robots mounted inside machines. Kassow publishes joint speeds of up to 225 deg/s for the KR1805.
Best applications for the UR3e
Compact benchtop assembly
Force-controlled insertion
Robots inside machines
Best applications for the Kassow KR1805
Long-reach machine tending
Light palletizing
Dispensing and inspection of large parts
UR3e advantages
±0.03 mm repeatability
11.2 kg arm
About 30% lower listed price
UR3e limitations
3 kg payload and 500 mm reach
Kassow KR1805 advantages
1800 mm reach
7 axes
5 kg payload
Kassow KR1805 limitations
About $14,300 higher listed price
Final verdict
Choose the Kassow Robots KR1805 for long reach and a seventh axis. Choose the UR3e for compact, precise benchtop work at a lower price.
Sources and further reading
Frequently asked questions
Which is cheaper, the UR3e or the Kassow Robots KR1805?
The UR3e is listed from $33,800 and the KR1805 from $48,100, a difference of $14,300.
Which robot carries more?
The KR1805 carries 5 kg and the UR3e 3 kg.
Which robot has the longer reach?
The KR1805 reaches 1800 mm and the UR3e 500 mm.
Which robot is more precise?
The UR3e publishes ±0.03 mm repeatability and the KR1805 ±0.04 mm.
How many axes do they have?
The KR1805 has 7 axes and the UR3e 6.
Which robot should I buy?
Choose the KR1805 for long reach. Choose the UR3e for compact benchtop work.
