KR 120 R3900-2 K vs MX-System
Side-by-side comparison of KR 120 R3900-2 K (KUKA Robotics) and MX-System (Beckhoff) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Agriculture buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- KR 120 R3900-2 KGermany
- MX-SystemGermany
Year First Available
- KR 120 R3900-2 K2015
- MX-System—
Verified Deployments
- KR 120 R3900-2 K0 Deployments
- MX-System0 Deployments
Layer 2: Operational
Price Range (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- MX-SystemContact for quote
Availability Status
- KR 120 R3900-2 KACTIVE
- MX-SystemACTIVE
Arm Mechanics
IP Rating (Arm)
- KR 120 R3900-2 KIP65
- MX-SystemIP67
Payload
- KR 120 R3900-2 K146 kg
- MX-System—
Reach
- KR 120 R3900-2 K3,904 mm
- MX-System—
Degrees of Freedom
- KR 120 R3900-2 K6
- MX-System—
Repeatability
- KR 120 R3900-2 K±0.04 mm
- MX-System—
Robot Weight
- KR 120 R3900-2 K42 kg
- MX-System36 kg
IP Rating (Wrist)
- KR 120 R3900-2 KIP67
- MX-System—
Performance
Duty Cycle
- KR 120 R3900-2 K—
- MX-Systemcontinuous 24 7
Safety
Safety Category
- KR 120 R3900-2 K—
- MX-SystemCat.3 PLd
Dual Check Safety
- KR 120 R3900-2 K—
- MX-SystemYes
Controller & Programming
Controller Model
- KR 120 R3900-2 KKR C5, KR C5 micro
- MX-System—
Digital Twin Support
- KR 120 R3900-2 K—
- MX-SystemYes
Connectivity
ROS-Industrial Support
- KR 120 R3900-2 K—
- MX-Systemnone
IoT / Cloud Platform
- KR 120 R3900-2 K—
- MX-SystemTwinCAT/BSD
Cybersecurity Certs
- KR 120 R3900-2 K—
- MX-SystemIEC 62443 SL1
End-Effector
Internal Cable Routing
- KR 120 R3900-2 K—
- MX-Systemthrough arm and wrist
Commercial
Price (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- MX-SystemContact for quote
Warranty
- KR 120 R3900-2 K2 yrs
- MX-System—
Service Network
- KR 120 R3900-2 Kglobal
- MX-Systemregional
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country | Germany | Germany |
| 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 | ||
| IP Rating (Arm) (priority for Agriculture buyers) (values differ) | IP65 | IP67 |
| Payload (priority for Agriculture buyers) (values differ) | 146 kg | — |
| Reach (values differ) | 3,904 mm | — |
| Degrees of Freedom (values differ) | 6 | — |
| Repeatability (values differ) | ±0.04 mm | — |
| Robot Weight (values differ) | 42 kg | 36 kg |
| IP Rating (Wrist) (values differ) | IP67 | — |
| Performance | ||
| Duty Cycle (values differ) | — | continuous 24 7 |
| Safety | ||
| Safety Category (values differ) | — | Cat.3 PLd |
| Dual Check Safety (values differ) | — | Yes |
| Controller & Programming | ||
| Controller Model (values differ) | KR C5, KR C5 micro | — |
| Digital Twin Support (values differ) | — | Yes |
| Connectivity | ||
| ROS-Industrial Support (values differ) | — | none |
| IoT / Cloud Platform (values differ) | — | TwinCAT/BSD |
| Cybersecurity Certs (values differ) | — | IEC 62443 SL1 |
| 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, Vibration Damping, Safety I/O Pairs, E-Stop Response, Safe Zone Count, Programming Languages, Teach Pendant Type, Offline Programming, Communication Protocols, 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 MX-System?
KR 120 R3900-2 K is made by KUKA Robotics, based in DE. MX-System is made by Beckhoff, based in DE.
How do KR 120 R3900-2 K and MX-System compare on the Robo Index?
KR 120 R3900-2 K grades AA on the Robo Index. MX-System grades BBB. 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.
Are KR 120 R3900-2 K and MX-System 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 MX-System?
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 MX-System 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.