KR 120 R3900-2 K vs KR 70 R2100 HO
Side-by-side comparison of KR 120 R3900-2 K (KUKA Robotics) and KR 70 R2100 HO (KUKA Robotics) — specs, pricing, Robo Score, and verified deployments. Updated daily.
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Layer 1: Identity & Trust
Manufacturer Country
- KR 120 R3900-2 KGermany
- KR 70 R2100 HOGermany
Year First Available
- KR 120 R3900-2 K2015
- KR 70 R2100 HO—
Verified Deployments
- KR 120 R3900-2 K0 Deployments
- KR 70 R2100 HO0 Deployments
Layer 2: Operational
Price
- KR 120 R3900-2 K$19,000–$84,900 USD
- KR 70 R2100 HO$52,000 USD
Availability Status
- KR 120 R3900-2 KACTIVE
- KR 70 R2100 HOACTIVE
Arm Mechanics
Payload
- KR 120 R3900-2 K146 kg
- KR 70 R2100 HO70 kg
Reach
- KR 120 R3900-2 K3,904 mm
- KR 70 R2100 HO2,101 mm
Degrees of Freedom
- KR 120 R3900-2 K6
- KR 70 R2100 HO6
Repeatability
- KR 120 R3900-2 K±0.04 mm
- KR 70 R2100 HO±0.05 mm
Robot Weight
- KR 120 R3900-2 K42 kg
- KR 70 R2100 HO536 kg
IP Rating (Arm)
- KR 120 R3900-2 KIP65
- KR 70 R2100 HOIP65
IP Rating (Wrist)
- KR 120 R3900-2 KIP67
- KR 70 R2100 HOIP65/IP67
Performance
Duty Cycle
- KR 120 R3900-2 K—
- KR 70 R2100 HOcontinuous 24 7
Safety
Dual Check Safety
- KR 120 R3900-2 K—
- KR 70 R2100 HOYes
Controller & Programming
Controller Model
- KR 120 R3900-2 KKR C5, KR C5 micro
- KR 70 R2100 HOKR C5; KR C4
Programming Languages
- KR 120 R3900-2 K—
- KR 70 R2100 HOKRL
Teach Pendant Type
- KR 120 R3900-2 K—
- KR 70 R2100 HOwired touch
Offline Programming
- KR 120 R3900-2 K—
- KR 70 R2100 HOKUKA.Sim
Connectivity
ROS-Industrial Support
- KR 120 R3900-2 K—
- KR 70 R2100 HOcommunity
IoT / Cloud Platform
- KR 120 R3900-2 K—
- KR 70 R2100 HOKUKA Connect
Predictive Maintenance
- KR 120 R3900-2 K—
- KR 70 R2100 HOthreshold based
End-Effector
Tool Flange Standard
- KR 120 R3900-2 K—
- KR 70 R2100 HOISO 9409-1
Tool Changer (ISO)
- KR 120 R3900-2 K—
- KR 70 R2100 HOStäubli
Internal Cable Routing
- KR 120 R3900-2 K—
- KR 70 R2100 HOthrough arm and wrist
Commercial
Price (USD)
- KR 120 R3900-2 K$19,000–$84,900 USD
- KR 70 R2100 HO$52,000 USD
Warranty
- KR 120 R3900-2 K2 yrs
- KR 70 R2100 HO1 yrs
Service Network
- KR 120 R3900-2 Kglobal
- KR 70 R2100 HOglobal
| | |
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country | Germany | Germany |
| Year First Available (values differ) | 2015 | — |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $19,000–$84,900 USD | $52,000 USD |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Payload (values differ) | 146 kg | 70 kg |
| Reach (values differ) | 3,904 mm | 2,101 mm |
| Degrees of Freedom | 6 | 6 |
| Repeatability (values differ) | ±0.04 mm | ±0.05 mm |
| Robot Weight (values differ) | 42 kg | 536 kg |
| IP Rating (Arm) | IP65 | IP65 |
| IP Rating (Wrist) (values differ) | IP67 | IP65/IP67 |
| Performance | ||
| Duty Cycle (values differ) | — | continuous 24 7 |
| Safety | ||
| Dual Check Safety (values differ) | — | Yes |
| Controller & Programming | ||
| Controller Model (values differ) | KR C5, KR C5 micro | KR C5; KR C4 |
| Programming Languages (values differ) | — | KRL |
| Teach Pendant Type (values differ) | — | wired touch |
| Offline Programming (values differ) | — | KUKA.Sim |
| Connectivity | ||
| ROS-Industrial Support (values differ) | — | community |
| IoT / Cloud Platform (values differ) | — | KUKA Connect |
| Predictive Maintenance (values differ) | — | threshold based |
| End-Effector | ||
| Tool Flange Standard (values differ) | — | ISO 9409-1 |
| Tool Changer (ISO) (values differ) | — | Stäubli |
| Internal Cable Routing (values differ) | — | through arm and wrist |
| Commercial | ||
| Price (USD) (values differ) | $19,000–$84,900 USD | $52,000 USD |
| Warranty (values differ) | 2 yrs | 1 yrs |
| Service Network | global | global |
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 Category, Safety I/O Pairs, E-Stop Response, Safe Zone Count, Digital Twin Support, Communication Protocols, Cybersecurity Certs, 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 | KR 120 R3900-2 K | KR 70 R2100 HO |
|---|---|---|
| Investment | $51,950 | $52,000 |
| Payback period | 12.5 mo | 12.5 mo |
| Net savings (5 yr) | $198,050 | $198,000 |
| ROI (5 yr) | +381% | +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 KR 120 R3900-2 K and KR 70 R2100 HO?
KR 120 R3900-2 K is made by KUKA Robotics, based in DE. KR 70 R2100 HO is made by KUKA Robotics, based in DE.
How do KR 120 R3900-2 K and KR 70 R2100 HO compare on the Robo Score?
KR 120 R3900-2 K scores 78.0 on the Robo Score. KR 70 R2100 HO scores 60.5. The Robo Score is a 0–100 credibility figure blending 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 KR 70 R2100 HO?
KR 120 R3900-2 K has a reach of 3904 mm. KR 70 R2100 HO has a reach of 2101 mm.
Are KR 120 R3900-2 K and KR 70 R2100 HO 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 KR 70 R2100 HO?
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 KR 70 R2100 HO 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 Score is calculated.