PRODUCT PREVIEW

eRob90I

A compact, powerful rotary actuator.

eRob90I is a compact, powerful rotary actuator with a performance-matched brushless servo motor. A motor-side friction brake provides strong, stable holding without power or in emergency conditions. The integrated servo driver supports EtherCAT and CANopen, while dual absolute encoders read both the motor side and the output shaft to enable ultra-precise absolute positioning.

With an 18 mm hollow shaft through the center, an overall length of only 75.9mm, and all core components enclosed in a high-quality industrial housing, eRob90I delivers a compact industrial form without reducing the system architecture.

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eRob90I front three-quarter product photo

Outer diameter: Ø90 mm
Hollow bore: Ø18 mm
Overall length: 75.9 mm

Application and Integration

Ultra compact, plug-and-play integration.

Designed for confined spaces, eRob90I delivers precise, powerful, and reliable rotary motion in an all-in-one actuator solution. It offers flexibility for use in surgical robotics, humanoid robots, bioprocessing equipment, bionic robots, collaborative robots, logistics and warehouse robots, autonomous retail robots, and art installations.

General Parameters

Item	Value
Nominal Supply Voltage	48 VDC
Gearing	Zero Backlash Gearing
Repeatability / Absolute Positioning Accuracy	±7 / ±15 arcsec
Output Encoder Resolution	19 bit
Motor Rated Speed	3000 RPM
Output Bearing	High-stiffness cross-roller bearing
Weight	1.506kg

Torque Parameters

Parameter	eRob90I-50	eRob90I-80	eRob90I-100	eRob90I-120
Gear Ratio	50	80	100	120
Rated Torque L10	33Nm	44Nm	52Nm	52Nm
Limit for Average Torque	44Nm	61Nm	64Nm	64Nm
Limit for Repeated Peak Torque	73Nm	96Nm	107Nm	113Nm
Limit for Momentary Peak Torque	127Nm	165Nm	191Nm	191Nm

Preconfigured before delivery according to the confirmed model number, drawing revision, quotation, and order documents.

Horizontal animated comparison of a traditional joint layout and compact eRob integration

Customer value

Why choose eRob.

Faster plug-and-play integration

Product-level quality and reliability

Precision gearing

Built for demanding application environments

Easier controller integration

High torque density in compact housing

Stable holding without power

Consistent actuator performance in one matched system

Faster selection and delivery

Customer Value

From selection to system start‑up.

eRob90I brings rotary motion, absolute positioning, fieldbus communication, and confirmed order data into one industrial actuator, helping customer teams move from model selection to controller connection with fewer open technical assumptions.

Commissioning readiness

The confirmed setup is prepared before delivery according to the model number, drawing revision, quotation, and order documents.

Control-system connection

EtherCAT, CANopen, Modbus, I/O, RS485, analog input, external encoder, and STO interfaces support connection to the customer’s controller architecture.

Performance in constrained designs

Dual absolute encoders and a motor-side friction brake support precise, powerful, and reliable rotary motion where available space is limited.

Faster selection and delivery

The complete model number connects gear ratio, interface choice, output sensing, and configuration suffix to reference drawings and quotation documents for clearer procurement alignment.

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