IRB 6700 vs KR 120 R3900-2 K
Side-by-side comparison of IRB 6700 (ABB) and KR 120 R3900-2 K (KUKA Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Healthcare & Hospitals buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- IRB 6700Switzerland
- KR 120 R3900-2 KGermany
Year First Available
- IRB 6700—
- KR 120 R3900-2 K2015
Verified Deployments
- IRB 67000 Deployments
- KR 120 R3900-2 K0 Deployments
Layer 2: Operational
Price
- IRB 6700$200,000–$260,000 USD
- KR 120 R3900-2 K$19,000–$84,900 USD
Availability Status
- IRB 6700ACTIVE
- KR 120 R3900-2 KACTIVE
Arm Mechanics
Repeatability
- IRB 6700±0.07 mm
- KR 120 R3900-2 K±0.04 mm
IP Rating (Arm)
- IRB 6700IP67
- KR 120 R3900-2 KIP65
Reach
- IRB 67002,650 mm
- KR 120 R3900-2 K3,904 mm
Payload
- IRB 6700300 kg
- KR 120 R3900-2 K146 kg
Degrees of Freedom
- IRB 6700—
- KR 120 R3900-2 K6
Max TCP Speed
- IRB 67001.2 m/s
- KR 120 R3900-2 K—
Robot Weight
- IRB 67001,250 kg
- KR 120 R3900-2 K42 kg
IP Rating (Wrist)
- IRB 6700—
- KR 120 R3900-2 KIP67
Controller & Programming
Controller Model
- IRB 6700IRC5
- KR 120 R3900-2 KKR C5, KR C5 micro
Teach Pendant Type
- IRB 6700Teach Pendant
- KR 120 R3900-2 K—
Commercial
Price (USD)
- IRB 6700$200,000–$260,000 USD
- KR 120 R3900-2 K$19,000–$84,900 USD
Warranty
- IRB 6700—
- KR 120 R3900-2 K2 yrs
Service Network
- IRB 6700—
- KR 120 R3900-2 Kglobal
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | Switzerland | Germany |
| Year First Available (values differ) | — | 2015 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $200,000–$260,000 USD | $19,000–$84,900 USD |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Repeatability (priority for Healthcare & Hospitals buyers) (values differ) | ±0.07 mm | ±0.04 mm |
| IP Rating (Arm) (priority for Healthcare & Hospitals buyers) (values differ) | IP67 | IP65 |
| Reach (priority for Healthcare & Hospitals buyers) (values differ) | 2,650 mm | 3,904 mm |
| Payload (values differ) | 300 kg | 146 kg |
| Degrees of Freedom (values differ) | — | 6 |
| Max TCP Speed (values differ) | 1.2 m/s | — |
| Robot Weight (values differ) | 1,250 kg | 42 kg |
| IP Rating (Wrist) (values differ) | — | IP67 |
| Controller & Programming | ||
| Controller Model (values differ) | IRC5 | KR C5, KR C5 micro |
| Teach Pendant Type (values differ) | Teach Pendant | — |
| Commercial | ||
| Price (USD) (values differ) | $200,000–$260,000 USD | $19,000–$84,900 USD |
| Warranty (values differ) | — | 2 yrs |
| Service Network (values differ) | — | global |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Battery / Shift Runtime, Path Accuracy, 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, Programming Languages, Offline Programming, Digital Twin Support, Communication Protocols, ROS-Industrial Support, IoT / Cloud Platform, Cybersecurity Certs, Predictive Maintenance, Tool Flange Standard, Tool Changer (ISO), Internal Cable Routing, Pneumatic Lines, Electrical Lines, Spare Parts Lead Time, Expected Service Life
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 | IRB 6700 | KR 120 R3900-2 K |
|---|---|---|
| Investment | $230,000 | $51,950 |
| Payback period | 55.2 mo | 12.5 mo |
| Net savings (5 yr) | $20,000 | $198,050 |
| ROI (5 yr) | +9% | +381% |
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 IRB 6700 and KR 120 R3900-2 K?
IRB 6700 is made by ABB, based in CH. KR 120 R3900-2 K is made by KUKA Robotics, based in DE.
How do IRB 6700 and KR 120 R3900-2 K compare on the Robo Index?
IRB 6700 grades A on the Robo Index. KR 120 R3900-2 K grades AAA. 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 IRB 6700 compare to KR 120 R3900-2 K?
IRB 6700 has a reach of 3050 mm. KR 120 R3900-2 K has a reach of 3904 mm.
Are IRB 6700 and KR 120 R3900-2 K 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 IRB 6700 and KR 120 R3900-2 K?
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
IRB 6700 vs KR 120 R3900-2 K 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.