KR 120 R3900-2 K vs KR SCARA

Side-by-side comparison of KR 120 R3900-2 K (KUKA Robotics) and KR SCARA (KUKA Robotics) — specs, pricing, Robo Index, and verified deployments. Updated daily.

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Optimized for Warehousing & Logistics buyers. Priority specs lifted to the top and marked with a target.

KR 120 R3900-2 KAAA

KR SCARAA

Layer 1: Identity & Trust

Manufacturer Country

KR 120 R3900-2 KGermany
KR SCARAGermany

Year First Available

KR 120 R3900-2 K2015
KR SCARA—

Verified Deployments

KR 120 R3900-2 K0 Deployments
KR SCARA0 Deployments

Layer 2: Operational

Price

KR 120 R3900-2 K$19,000–$84,900 USD
KR SCARA$32,600–$35,000 USD

Availability Status

KR 120 R3900-2 KACTIVE
KR SCARAACTIVE

Arm Mechanics

Payload

KR 120 R3900-2 K146 kg
KR SCARA12 kg

Reach

KR 120 R3900-2 K3,904 mm
KR SCARA650 mm

Degrees of Freedom

KR 120 R3900-2 K6
KR SCARA4

Repeatability

KR 120 R3900-2 K±0.04 mm
KR SCARA±0.02 mm

Robot Weight

KR 120 R3900-2 K42 kg
KR SCARA—

IP Rating (Arm)

KR 120 R3900-2 KIP65
KR SCARAIP54

IP Rating (Wrist)

KR 120 R3900-2 KIP67
KR SCARA—

Performance

Cycle Time (25/305/25)

KR 120 R3900-2 K—
KR SCARA0.4 s

Duty Cycle

KR 120 R3900-2 K—
KR SCARAcontinuous 24 7

Controller & Programming

Controller Model

KR 120 R3900-2 KKR C5, KR C5 micro
KR SCARAKR C5

End-Effector

Internal Cable Routing

KR 120 R3900-2 K—
KR SCARAthrough arm

Commercial

Price (USD)

KR 120 R3900-2 K$19,000–$84,900 USD
KR SCARA$32,600–$35,000 USD

Warranty

KR 120 R3900-2 K2 yrs
KR SCARA—

Service Network

KR 120 R3900-2 Kglobal
KR SCARAglobal

	KR 120 R3900-2 Kindustrial-armKUKA Robotics AAARobo Index	KR SCARAindustrial-armKUKA Robotics ARobo Index
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	$32,600–$35,000 USD
Availability Status	ACTIVE	ACTIVE
Layer 3: Category Specific
Arm Mechanics
Payload (priority for Warehousing & Logistics buyers) (values differ)	146 kg	12 kg
Reach (values differ)	3,904 mm	650 mm
Degrees of Freedom (values differ)	6	4
Repeatability (values differ)	±0.04 mm	±0.02 mm
Robot Weight (values differ)	42 kg	—
IP Rating (Arm) (values differ)	IP65	IP54
IP Rating (Wrist) (values differ)	IP67	—
Performance
Cycle Time (25/305/25) (values differ)	—	0.4 s
Duty Cycle (values differ)	—	continuous 24 7
Controller & Programming
Controller Model (values differ)	KR C5, KR C5 micro	KR C5
End-Effector
Internal Cable Routing (values differ)	—	through arm
Commercial
Price (USD) (values differ)	$19,000–$84,900 USD	$32,600–$35,000 USD
Warranty (values differ)	2 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, 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, IoT / Cloud Platform, Cybersecurity Certs, Predictive Maintenance, Tool Flange Standard, Tool Changer (ISO), Pneumatic Lines, Electrical Lines, Spare Parts Lead Time, Expected Service Life

best in categoryweakest in categoryvalues differ

ROI Comparison

Same operating assumptions across every robot — the only difference is price. Set your numbers once to see which pays back fastest.

Robots (fleet)

Hours / day

Labor $/hr (USD)

Days / year

Annual labor displaced (per robot): $50,000

Metric	KR 120 R3900-2 K	KR SCARA
Investment	$51,950	$33,800
Payback period	12.5 mo	8.1 mo
Net savings (5 yr)	$198,050	$216,200
ROI (5 yr)	+381%	+640%

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 SCARA?

KR 120 R3900-2 K is made by KUKA Robotics, based in DE. KR SCARA is made by KUKA Robotics, based in DE.

How do KR 120 R3900-2 K and KR SCARA compare on the Robo Index?

KR 120 R3900-2 K grades AAA on the Robo Index. KR SCARA 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 KR SCARA?

KR 120 R3900-2 K has a reach of 3904 mm. KR SCARA has a reach of 1200 mm.

Are KR 120 R3900-2 K and KR SCARA 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 SCARA?

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

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About this comparison

KR 120 R3900-2 K vs KR SCARA 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.