Side-by-side comparison of boxEZ Box Erector Robot (Flex-Line Automation) and KR 120 R3900-2 K (KUKA Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Manufacturer Country

Year First Available

Verified Deployments

Price Range (USD)

Availability Status

Payload

Reach

Degrees of Freedom

Repeatability

Robot Weight

IP Rating (Arm)

IP Rating (Wrist)

Duty Cycle

Controller Model

IoT / Cloud Platform

Price (USD)

Warranty

Service Network

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|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | — | Germany |
| Year First Available (values differ) | — | 2015 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price Range (USD) (values differ) | Contact for quote | $19,000–$84,900 USD |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Arm Mechanics | ||
| Payload (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) | 550 kg | 42 kg |
| IP Rating (Arm) (values differ) | — | IP65 |
| IP Rating (Wrist) (values differ) | — | IP67 |
| Performance | ||
| Duty Cycle (values differ) | continuous 24 7 | — |
| Controller & Programming | ||
| Controller Model (values differ) | — | KR C5, KR C5 micro |
| Connectivity | ||
| IoT / Cloud Platform (values differ) | SIAT Connect | — |
| Commercial | ||
| Price (USD) (values differ) | Contact for quote | $19,000–$84,900 USD |
| Warranty (values differ) | — | 2 yrs |
| Service Network (values differ) | regional | 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, Dual Check Safety, Safety I/O Pairs, E-Stop Response, Safe Zone Count, Programming Languages, Teach Pendant Type, Offline Programming, Digital Twin Support, Communication Protocols, ROS-Industrial Support, Cybersecurity Certs, Predictive Maintenance, Tool Flange Standard, Tool Changer (ISO), Internal Cable Routing, Pneumatic Lines, Electrical Lines, Spare Parts Lead Time, Expected Service Life
Frequently asked
boxEZ Box Erector Robot is made by Flex-Line Automation. KR 120 R3900-2 K is made by KUKA Robotics, based in DE.
boxEZ Box Erector Robot grades BB on the Robo Index. KR 120 R3900-2 K grades AA. 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.
Both robots are classified as Industrial Arm on Robolist. Filters and ranking treat them as direct alternatives.
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.
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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boxEZ Box Erector Robot 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.