Ti5 ROBOT CRA-RI70-90-PRO Motor Joint Module 500W 24-48V 16Bit Encoder 51/81/101/121 Ratio

Ti5 ROBOT

$1,447.00 USD

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Version CRA-RI70-90-PRO-51 Motor CRA-RI70-90-PRO-81 Motor CRA-RI70-90-PRO-101 Motor CRA-RI70-90-PRO-121 Motor

Encoder Single Encoder Dual Encoder

Brake without Break with Break

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Overview

The Ti5 ROBOT CRA-RI70-90-PRO Motor is a lightweight joint module motor designed for robotic joint actuation. The module integrates key joint components such as control board, encoder, and harmonic reducers for compact robotic system integration.

Key Features

Lightweight joint module
Small size, powerful performance
Modularization concept
Industry-leading mass production advantage (stated)
All of the underlying hardware can be controlled, and the localization rate can reach 100% (stated)
Complete software toolchain for robot development to help accelerate research and development (stated)

Internal Module Components (Exploded View Labels)

1. Motor back cover
2. Control board
3. Encoder
4. Stator housing
5. Motor rotor
6. Motor stator
7. Harmonic reducers
8. Flexspline Cover

Torque Density Comparison Text (as shown)

Comparison of torque density of mainstream joint products (Nm/kg)

Ti5 Robot Next Generation: 250+
An American brand: 254
Ti5 Robot mass production model: 192
A Chinese brand: 80.4
A Canadian brand: 53.5
A Korean brand: 33.8

Specifications

Parameter	Value
Motor Model	CRA-RI70-90-PRO-XX / CRA-RI70-90-PRO-XX-B
Reduction Ratio	51 / 81 / 101 / 121
Start-stop Peak Torque	69 / 91 / 102 / 108 N.m
Maximum Allowable Average Load Torque	42 / 58 / 61 / 61 N.m
2000 Rpm/(Reduction Ratio) Rated Torque at this speed	32 / 42 / 50 / 50 N·m
Output End Peak Rotational Speed	77 / 48 / 40 / 30 RPM
Rated Speed	61 / 38 / 30 / 25 RPM
Motor Power	500 W
Supply Voltage	24-48 V
Maximum Continuous Current	8.4 A
Rated Current	6.1 A
Encoder Resolution	16 Bit
Back Clearance	20 / 20 / 10 / 10 / 10 arcsec
Torque Constant	0.118 N·m/A
Hole	18 mm
Length: Without brake / With brake	73.5 ± 0.5 mm / 92 ± 0.5 mm
Weight: Without brake / With brake	1.27 kg / 1.5 kg
Inertia: Without brake / With brake	596.4 g·cm² / 746.7 g·cm²

Applications

Humanoid Robots
Robotic Arms
Exoskeletons
Quadruped Robots
AGV Vehicles
ARU Robots

Manuals

CRA-RI70-90-PRO-Motor Installation Dimension Drawing.pdf

For selection guidance across reduction ratios and brake options, contact support@rcdrone.top or visit https://rcdrone.top/.

Details

Ti5 ROBOT CRA-RI70-90-PRO lightweight motor joint module lineup for robotic joint actuation

Compact joint module design for robots where low weight and high integration matter.

CRA-RI70-90-PRO joint motor module exploded assembly view highlighting modularized components

A modular structure integrates key joint hardware to simplify robotic system integration.

Cutaway rendering of the joint module showing internal drive structure and integrated components

Exploded view with labeled parts: back cover, control board, encoder, stator, rotor, harmonic reducer

Core components are built into one module, including the control board, 16-bit encoder, and harmonic reducer.

High torque density graphic comparing mainstream joint products (Nm/kg) with performance bars

Torque-density comparison chart is provided for quick benchmarking across mainstream joint modules.

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Ti5 ROBOT CRA-RI70-90-PRO Motor Joint Module 500W 24-48V 16Bit Encoder 51/81/101/121 Ratio