Ti5 Robot CRA-RI80-110-PRO Joint Actuator, 750 W 24–48 V, 27 mm Hollow Shaft, CAN, 17-bit, 51–161:1, up to 217 N·m peak

Overview

The Ti5 Robot CRA-RI80-110-PRO-XX is a hollow-shaft, integrated robot joint actuator designed for high-end arms and legged robots. It combines a frameless torque motor, precision harmonic reducer, dual-side flanges, and high-resolution encoder in a compact 110 mm-class module with a 27 mm through-hole. The PRO series emphasizes robustness, high torque density, low noise/cogging, and precise positioning. Typical options include a holding brake (-B), torque sensor (-T), dual encoder (-2E), and IP protection (IPXX). With 51–161:1 ratios, CAN bus control, and 24–48 V operation, RI80-110-PRO delivers up to 217 N·m peak torque with 10–20 arc-sec backlash, making it ideal for humanoids, cobots, exoskeletons, AGVs, and other premium applications.

Key Features

• High torque density: peak 121–217 N·m across available ratios; rated torque up to 84 N·m (at 2000 rpm/ratio).

• Precise & low backlash: 10–20 arc-sec (ratio-dependent) with smooth, low-cogging control.

• Hollow shaft: Ø27 mm through-hole for cables, pneumatics, or shafts.

• Integrated mechatronics: torque motor + harmonic reducer + encoder in one module.

• Quiet & robust: PRO-grade construction for long cycle life and low noise/vibration.

• Flexible options: brake (-B), torque sensor (-T), dual encoder (-2E), optional IP rating (IPXX).

• Standard CAN bus, 24–48 V supply, and 17-bit class encoder feedback.

Specifications

Model: CRA-RI80-110-PRO-XX (standard) / CRA-RI80-110-PRO-XX-B (with brake; longer body)

Performance by Reduction Ratio

Electrical

• Motor power: 750 W

• Supply voltage: 24–48 V

• Max continuous current: 10.4 A

• Rated current: 9 A

• Phase resistance: 0.13 Ω

• Torque constant: 0.143 N·m/A

• Inductance: 0.25 mH

• Pole pairs: 8

• Encoder resolution: 17-bit class

• Communication: CAN

Mechanics & Dimensions

• Through-hole (hollow shaft): Ø27 mm

• Overall length: 82.4 ± 0.5 mm (standard); 102.4 ± 0.5 mm (-B)

• Mass: 2.1 kg (standard); 2.6 kg (-B)

• Rotational inertia (motor side): 1255 g·cm² (standard); 1484 g·cm² (-B)

• Series/OD: RI80-110 family (110 mm-class outer diameter; dual-flange layout)

Options & Naming

CRA-PIXX-XX-(PRO)-XX-(B, T, 2E, IPXX)
— Brake = B; Torque sensor = T; Dual encoder = 2E; IP protection = IPXX (select level as needed).

Applications

• Humanoid robots (shoulder/hip/knee/ankle), exoskeletons

• Collaborative robot joints (elbow/wrist/waist axes)

• Mobile platforms/AGVs and steering/drive modules

• Precision industrial actuators requiring low noise, high accuracy, and hollow-shaft routing

Details

CRA-RI80-110-PRO-XX robot joint actuator specifications include gear ratios, torque, speed, voltage, current, encoder resolution, and physical dimensions. Features CAN communication, 750W power, and precise control for robotic applications.

Ti5 Robot Joint Actuator CRA-RI80-110-PRO-XX-B delivers 750W power, 24–48V input, CAN communication, multiple gear ratios, 217N·m torque, 17-bit encoder, and weighs 2.6kg.

PRO series robot joint actuators with various models, reduction ratios, torque values, and rated speeds. Specifications include peak torque, average load torque, and RPM at different conditions.