KR 120 R3900-2 K vs RX75
Side-by-side comparison of KR 120 R3900-2 K (KUKA Robotics) and RX75 (RealMan Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.
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Layer 1: Identity & Trust
Manufacturer Country
- KR 120 R3900-2 KGermany
- RX75China
Year First Available
- KR 120 R3900-2 K2015
- RX75—
Verified Deployments
- KR 120 R3900-2 K0 Deployments
- RX750 Deployments
Layer 2: Operational
Price Range (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- RX75Contact for quote
Availability Status
- KR 120 R3900-2 KACTIVE
- RX75ACTIVE
Arm Mechanics
Payload
- KR 120 R3900-2 K146 kg
- RX755 kg
Reach
- KR 120 R3900-2 K3,904 mm
- RX75709 mm
Degrees of Freedom
- KR 120 R3900-2 K6
- RX757
Repeatability
- KR 120 R3900-2 K±0.04 mm
- RX75±0.2 mm
Robot Weight
- KR 120 R3900-2 K42 kg
- RX758.2 kg
IP Rating (Arm)
- KR 120 R3900-2 KIP65
- RX75IP54
IP Rating (Wrist)
- KR 120 R3900-2 KIP67
- RX75—
Controller & Programming
Controller Model
- KR 120 R3900-2 KKR C5, KR C5 micro
- RX75integrated
Programming Languages
- KR 120 R3900-2 K—
- RX75C, C++, C#, Python
Teach Pendant Type
- KR 120 R3900-2 K—
- RX75wired button
Connectivity
ROS-Industrial Support
- KR 120 R3900-2 K—
- RX75vendor supported
End-Effector
Internal Cable Routing
- KR 120 R3900-2 K—
- RX75through arm and wrist
Commercial
Price (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- RX75Contact for quote
Warranty
- KR 120 R3900-2 K2 yrs
- RX75—
Service Network
- KR 120 R3900-2 Kglobal
- RX75regional
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | Germany | China |
| Year First Available (values differ) | 2015 | — |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price Range (USD) (values differ) | $19,000–$84,900 USD | Contact for quote |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Payload (values differ) | 146 kg | 5 kg |
| Reach (values differ) | 3,904 mm | 709 mm |
| Degrees of Freedom (values differ) | 6 | 7 |
| Repeatability (values differ) | ±0.04 mm | ±0.2 mm |
| Robot Weight (values differ) | 42 kg | 8.2 kg |
| IP Rating (Arm) (values differ) | IP65 | IP54 |
| IP Rating (Wrist) (values differ) | IP67 | — |
| Controller & Programming | ||
| Controller Model (values differ) | KR C5, KR C5 micro | integrated |
| Programming Languages (values differ) | — | C, C++, C#, Python |
| Teach Pendant Type (values differ) | — | wired button |
| Connectivity | ||
| ROS-Industrial Support (values differ) | — | vendor supported |
| End-Effector | ||
| Internal Cable Routing (values differ) | — | through arm and wrist |
| Commercial | ||
| Price (USD) (values differ) | $19,000–$84,900 USD | Contact for quote |
| Warranty (values differ) | 2 yrs | — |
| Service Network (values differ) | global | regional |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Battery / Shift Runtime, Path Accuracy, Max TCP Speed, Cycle Time (25/305/25), MTBF, Duty Cycle, Vibration Damping, Safety Category, Dual Check Safety, Safety I/O Pairs, E-Stop Response, Safe Zone Count, Offline Programming, Digital Twin Support, Communication Protocols, IoT / Cloud Platform, Cybersecurity Certs, Predictive Maintenance, Tool Flange Standard, Tool Changer (ISO), Pneumatic Lines, Electrical Lines, Spare Parts Lead Time, Expected Service Life
best in categoryweakest in categoryvalues differ
Trade-offs at a glance
Frequently asked
Who makes KR 120 R3900-2 K and RX75?
KR 120 R3900-2 K is made by KUKA Robotics, based in DE. RX75 is made by RealMan Robotics, based in CN.
How do KR 120 R3900-2 K and RX75 compare on the Robo Index?
KR 120 R3900-2 K grades AA on the Robo Index. RX75 grades A. The Robo Index is a credibility grade (AAA … C) that blends commercial maturity, verified deployments, company standing, and independent coverage — see methodology for the full breakdown.
How does the reach of KR 120 R3900-2 K compare to RX75?
KR 120 R3900-2 K has a reach of 3904 mm. RX75 has a reach of 709 mm.
Are KR 120 R3900-2 K and RX75 in the same category?
Both robots are classified as Industrial Arm on Robolist. Filters and ranking treat them as direct alternatives.
What is the realistic total cost of ownership for Industrial Arm robots?
Hardware cost is one input. Industrial Arm TCO also includes integration, training, downtime, and end-of-life. Our breakdown: TCO of a 6-Axis Arm Cell: Hardware, EOAT, Integration, Programming.
What should a buyer ask vendors when choosing between KR 120 R3900-2 K and RX75?
Spec sheets only show part of the story. Useful vendor questions cover support, lifecycle, integration cost, and references. We have a buyer-focused checklist: Industrial Arm Vendor Selection: Capability Matrices and Proof Points.
Going deeper — picking the right robot
TCO of a 6-Axis Arm Cell: Hardware, EOAT, Integration, Programming
7 min readIndustrial Arms
Industrial Arm Vendor Selection: Capability Matrices and Proof Points
9 min readIndustrial Arms
Programming Approaches: Teach Pendant, Offline, AI-Assisted — What Each Costs You
8 min readIndustrial Arms
Build vs buy vs lease: which model fits a first deployment
8 min readChoosing Your First Robot
The hidden specs vendors hope you'll miss
10 min readReading the Spec Sheet
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About this comparison
KR 120 R3900-2 K vs RX75 compares two robots in the industrial-arm category. All data is sourced from manufacturer spec sheets, verified deployments, and third-party filings; see our methodology for how the Robo Index is calculated.