850 vs KR 120 R3900-2 K
Side-by-side comparison of 850 (UFACTORY) and KR 120 R3900-2 K (KUKA Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Manufacturing buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- 850China
- KR 120 R3900-2 KGermany
Year First Available
- 850—
- KR 120 R3900-2 K2015
Verified Deployments
- 8500 Deployments
- KR 120 R3900-2 K0 Deployments
Layer 2: Operational
Price
- 850$9,299–$9,849 USD
- KR 120 R3900-2 K$19,000–$84,900 USD
Availability Status
- 850ACTIVE
- KR 120 R3900-2 KACTIVE
Arm Mechanics
Reach
- 850850 mm
- KR 120 R3900-2 K3,904 mm
Repeatability
- 850±0.02 mm
- KR 120 R3900-2 K±0.04 mm
Payload
- 8505 kg
- KR 120 R3900-2 K146 kg
IP Rating (Arm)
- 850—
- KR 120 R3900-2 KIP65
Degrees of Freedom
- 8506
- KR 120 R3900-2 K6
Robot Weight
- 85020 kg
- KR 120 R3900-2 K42 kg
IP Rating (Wrist)
- 850—
- KR 120 R3900-2 KIP67
Controller & Programming
Controller Model
- 850—
- KR 120 R3900-2 KKR C5, KR C5 micro
Teach Pendant Type
- 850hand teaching
- KR 120 R3900-2 K—
Commercial
Price (USD)
- 850$9,299–$9,849 USD
- KR 120 R3900-2 K$19,000–$84,900 USD
Warranty
- 8501 yrs
- KR 120 R3900-2 K2 yrs
Service Network
- 850—
- KR 120 R3900-2 Kglobal
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | China | Germany |
| Year First Available (values differ) | — | 2015 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $9,299–$9,849 USD | $19,000–$84,900 USD |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Reach (priority for Manufacturing buyers) (values differ) | 850 mm | 3,904 mm |
| Repeatability (priority for Manufacturing buyers) (values differ) | ±0.02 mm | ±0.04 mm |
| Payload (priority for Manufacturing buyers) (values differ) | 5 kg | 146 kg |
| IP Rating (Arm) (priority for Manufacturing buyers) (values differ) | — | IP65 |
| Degrees of Freedom | 6 | 6 |
| Robot Weight (values differ) | 20 kg | 42 kg |
| IP Rating (Wrist) (values differ) | — | IP67 |
| Controller & Programming | ||
| Controller Model (values differ) | — | KR C5, KR C5 micro |
| Teach Pendant Type (values differ) | hand teaching | — |
| Commercial | ||
| Price (USD) (values differ) | $9,299–$9,849 USD | $19,000–$84,900 USD |
| Warranty (values differ) | 1 yrs | 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, 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, 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 | 850 | KR 120 R3900-2 K |
|---|---|---|
| Investment | $9,574 | $51,950 |
| Payback period | 2.3 mo | 12.5 mo |
| Net savings (5 yr) | $240,426 | $198,050 |
| ROI (5 yr) | +2511% | +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 850 and KR 120 R3900-2 K?
850 is made by UFACTORY, based in CN. KR 120 R3900-2 K is made by KUKA Robotics, based in DE.
How do 850 and KR 120 R3900-2 K compare on the Robo Index?
850 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 850 compare to KR 120 R3900-2 K?
850 has a reach of 850 mm. KR 120 R3900-2 K has a reach of 3904 mm.
Are 850 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 850 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
850 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.