KR 120 R3900-2 K vs YK-XG Series
Side-by-side comparison of KR 120 R3900-2 K (KUKA Robotics) and YK-XG Series (Yamaha Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Hospitality & F&B buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- KR 120 R3900-2 KGermany
- YK-XG SeriesJapan
Year First Available
- KR 120 R3900-2 K2015
- YK-XG Series—
Verified Deployments
- KR 120 R3900-2 K0 Deployments
- YK-XG Series0 Deployments
Layer 2: Operational
Price
- KR 120 R3900-2 K$19,000–$84,900 USD
- YK-XG SeriesContact for quote
Availability Status
- KR 120 R3900-2 KACTIVE
- YK-XG SeriesACTIVE
Arm Mechanics
Payload
- KR 120 R3900-2 K146 kg
- YK-XG Series20 kg
Robot Weight
- KR 120 R3900-2 K42 kg
- YK-XG Series—
Reach
- KR 120 R3900-2 K3,904 mm
- YK-XG Series600 mm
Degrees of Freedom
- KR 120 R3900-2 K6
- YK-XG Series4
Repeatability
- KR 120 R3900-2 K±0.04 mm
- YK-XG Series±0.01 mm
IP Rating (Arm)
- KR 120 R3900-2 KIP65
- YK-XG SeriesIP20
IP Rating (Wrist)
- KR 120 R3900-2 KIP67
- YK-XG Series—
Performance
Duty Cycle
- KR 120 R3900-2 K—
- YK-XG Seriescontinuous 24 7
Vibration Damping
- KR 120 R3900-2 K—
- YK-XG Seriespassive
Safety
Safety Category
- KR 120 R3900-2 K—
- YK-XG SeriesCat.3 PLd
Dual Check Safety
- KR 120 R3900-2 K—
- YK-XG SeriesYes
Safety I/O Pairs
- KR 120 R3900-2 K—
- YK-XG Series8
E-Stop Response
- KR 120 R3900-2 K—
- YK-XG Series100 ms
Safe Zone Count
- KR 120 R3900-2 K—
- YK-XG Series4
Controller & Programming
Controller Model
- KR 120 R3900-2 KKR C5, KR C5 micro
- YK-XG SeriesRCX340 / RCX341
Programming Languages
- KR 120 R3900-2 K—
- YK-XG SeriesYamaha G-code, Yamaha BASIC-like language, RAPID (optional)
Teach Pendant Type
- KR 120 R3900-2 K—
- YK-XG Serieswired touch
Offline Programming
- KR 120 R3900-2 K—
- YK-XG SeriesYamaha RoboGuide
Digital Twin Support
- KR 120 R3900-2 K—
- YK-XG SeriesNo
Connectivity
ROS-Industrial Support
- KR 120 R3900-2 K—
- YK-XG Seriesnone
IoT / Cloud Platform
- KR 120 R3900-2 K—
- YK-XG SeriesYamaha Connect
Cybersecurity Certs
- KR 120 R3900-2 K—
- YK-XG SeriesIEC 62443 SL1
Predictive Maintenance
- KR 120 R3900-2 K—
- YK-XG Seriesthreshold based
End-Effector
Tool Flange Standard
- KR 120 R3900-2 K—
- YK-XG SeriesISO 9409-1
Tool Changer (ISO)
- KR 120 R3900-2 K—
- YK-XG Seriesproprietary
Internal Cable Routing
- KR 120 R3900-2 K—
- YK-XG Seriesthrough arm and wrist
Pneumatic Lines
- KR 120 R3900-2 K—
- YK-XG Series2
Electrical Lines
- KR 120 R3900-2 K—
- YK-XG Series8
Commercial
Price (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- YK-XG SeriesContact for quote
Warranty
- KR 120 R3900-2 K2 yrs
- YK-XG Series—
Service Network
- KR 120 R3900-2 Kglobal
- YK-XG Seriesglobal
Spare Parts Lead Time
- KR 120 R3900-2 K—
- YK-XG Series30 days
Expected Service Life
- KR 120 R3900-2 K—
- YK-XG Series10 yrs
| | |
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | Germany | Japan |
| Year First Available (values differ) | 2015 | — |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $19,000–$84,900 USD | Contact for quote |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Payload (priority for Hospitality & F&B buyers) (values differ) | 146 kg | 20 kg |
| Robot Weight (priority for Hospitality & F&B buyers) (values differ) | 42 kg | — |
| Reach (values differ) | 3,904 mm | 600 mm |
| Degrees of Freedom (values differ) | 6 | 4 |
| Repeatability (values differ) | ±0.04 mm | ±0.01 mm |
| IP Rating (Arm) (values differ) | IP65 | IP20 |
| IP Rating (Wrist) (values differ) | IP67 | — |
| Performance | ||
| Duty Cycle (values differ) | — | continuous 24 7 |
| Vibration Damping (values differ) | — | passive |
| Safety | ||
| Safety Category (values differ) | — | Cat.3 PLd |
| Dual Check Safety (values differ) | — | Yes |
| Safety I/O Pairs (values differ) | — | 8 |
| E-Stop Response (values differ) | — | 100 ms |
| Safe Zone Count (values differ) | — | 4 |
| Controller & Programming | ||
| Controller Model (values differ) | KR C5, KR C5 micro | RCX340 / RCX341 |
| Programming Languages (values differ) | — | Yamaha G-code, Yamaha BASIC-like language, RAPID (optional) |
| Teach Pendant Type (values differ) | — | wired touch |
| Offline Programming (values differ) | — | Yamaha RoboGuide |
| Digital Twin Support (values differ) | — | No |
| Connectivity | ||
| ROS-Industrial Support (values differ) | — | none |
| IoT / Cloud Platform (values differ) | — | Yamaha Connect |
| Cybersecurity Certs (values differ) | — | IEC 62443 SL1 |
| Predictive Maintenance (values differ) | — | threshold based |
| End-Effector | ||
| Tool Flange Standard (values differ) | — | ISO 9409-1 |
| Tool Changer (ISO) (values differ) | — | proprietary |
| Internal Cable Routing (values differ) | — | through arm and wrist |
| Pneumatic Lines (values differ) | — | 2 |
| Electrical Lines (values differ) | — | 8 |
| Commercial | ||
| Price (USD) (values differ) | $19,000–$84,900 USD | Contact for quote |
| Warranty (values differ) | 2 yrs | — |
| Service Network | global | global |
| Spare Parts Lead Time (values differ) | — | 30 days |
| Expected Service Life (values differ) | — | 10 yrs |
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, Communication Protocols
ROI Comparison
Same operating assumptions across every robot — the only difference is price. Set your numbers once to see which pays back fastest.
Annual labor displaced (per robot): $50,000
| Metric | KR 120 R3900-2 K | YK-XG Series |
|---|---|---|
| Investment | $51,950 | No price |
| Payback period | 12.5 mo | — |
| Net savings (5 yr) | $198,050 | — |
| ROI (5 yr) | +381% | — |
YK-XG Series has no listed price, so payback can't be computed. Contact the manufacturer for a quote.
Estimates labor-cost displacement only — not a full total cost of ownership. Actual ROI depends on integration, maintenance, training, downtime, and task fit. Converted currencies are indicative; USD is the price of record.
Trade-offs at a glance
Frequently asked
Who makes KR 120 R3900-2 K and YK-XG Series?
KR 120 R3900-2 K is made by KUKA Robotics, based in DE. YK-XG Series is made by Yamaha Robotics, based in JP.
How do KR 120 R3900-2 K and YK-XG Series compare on the Robo Index?
KR 120 R3900-2 K grades AAA on the Robo Index. YK-XG Series 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 YK-XG Series?
KR 120 R3900-2 K has a reach of 3904 mm. YK-XG Series has a reach of 400 mm.
Are KR 120 R3900-2 K and YK-XG Series 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 YK-XG Series?
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 YK-XG Series 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.