• Ti5 Robot CRA-RI70-90-PRO-XX Harmonic Servo Joint, 500 W, 24–48 V, 17-bit, CAN/EtherCAT, 51–121:1, IP65 (Brake Option)
  • Ti5 Robot CRA-RI70-90-PRO-XX Harmonic Servo Joint, 500 W, 24–48 V, 17-bit, CAN/EtherCAT, 51–121:1, IP65 (Brake Option)
  • Ti5 Robot CRA-RI70-90-PRO-XX Harmonic Servo Joint, 500 W, 24–48 V, 17-bit, CAN/EtherCAT, 51–121:1, IP65 (Brake Option)
  • High-precision 17-bit servo joint with reducer angle sensing, 500W power, 24-48V input, CAN/EtherCAT communication, IP65 rated for durability.
  • High torque density, compact size, lightweight, power memory
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Ti5 Robot CRA-RI70-90-PRO-XX Harmonic Servo Joint, 500 W, 24–48 V, 17-bit, CAN/EtherCAT, 51–121:1, IP65 (Brake Option)

Ti5 Robot CRA-RI70-90-PRO-XX Harmonic Servo Joint, 500 W, 24–48 V, 17-bit, CAN/EtherCAT, 51–121:1, IP65 (Brake Option)

Ti5 Robot

$1,479.00 USD
$1,479.00 USD
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Communication
Encoder
Brake
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Overview

The Ti5 Robot CRA-RI70-90-PRO-XX is an integrated robotic joint module that combines an ultra-thin harmonic reducer, brushless torque motor, FOC servo drive, and an absolute encoder in a compact hollow-shaft design. With rated power of 500 W, supply 24–48 V, and reduction ratios 51/81/101/121:1, it delivers high torque with near-zero backlash and precise positioning for humanoids, cobots, gimbals, mobile platforms, and exoskeletons. A 17-bit absolute encoder ensures accurate servo control, and CAN or EtherCAT communication simplifies system integration. The module is IP65 sealed and is available with or without brake (-B variant).

Key Features

  • Integrated harmonic servo joint: reducer + BLDC torque motor + 17-bit absolute encoder + FOC controller.

  • High torque & low backlash: up to 50 N·m rated torque (ratio-dependent) with ≤20/10 arc-sec backlash.

  • Multiple ratios: 51/81/101/121:1 to balance speed and torque.

  • Wide supply & power: 24–48 V, 500 W, designed for 24/36/48 V robots.

  • Hollow shaft Ø14.5 mm for cable/air line routing; 10 pole-pairs motor.

  • Communications: CAN or EtherCAT; single- or dual-encoder options.

  • Protection: IP65 environmental sealing.

  • Brake option: CRA-RI70-90-PRO-XX-B includes holding brake for safe power-off.

Specifications

Model family: CRA-RI70-90-PRO-XX (standard) / CRA-RI70-90-PRO-XX-B (with brake)

Item Value
Reduction ratios 51 / 81 / 101 / 121 : 1
Rated torque @ 2000 rpm/ratio 32 / 42 / 50 / 50 N·m
Startup peak torque 63 / 91 / 102 / 108 N·m
Max allowable load torque (avg) 42 / 58 / 61 / 61 N·m
Rated speed (½ rated torque) 61 / 38 / 30 / 25 rpm
Peak output speed 77 / 48 / 40 / 30 rpm
Backlash 20 arc-sec (51,81); 10 arc-sec (101,121)
Motor power 500 W
Supply voltage 24–48 V DC
Rated / max continuous current 6.1 A / 8.4 A
Phase resistance / inductance 0.38 Ω / 0.33 mH
Torque constant 0.118 N·m/A
Motor pole pairs 10
Encoder 17-bit absolute (single or dual-encoder available)
Communication bus CAN (EtherCAT available per options)
Hollow-shaft bore Ø14.5 mm
Module length 71.9 ± 0.5 mm (standard) / 97.4 ± 0.5 mm (-B)
Mass 1.3 kg (standard) / 1.6 kg (-B)
Rotor inertia (ref.) 594 g·cm² (standard) / 682 g·cm² (-B)
Ingress protection IP65
Mounting Flange mounting with threaded holes

Notes
• Performance values vary with selected ratio (51/81/101/121).
• “-B” denotes the factory brake option.
• Single/dual encoder and CAN/EtherCAT are selectable options.

Applications

  • Humanoid and service robots: hip, knee, shoulder, and elbow joints requiring compact high-torque modules.

  • Collaborative/manipulator arms: precise low-backlash joints for 6-/7-axis cobots.

  • Gimbals & pan-tilt units: smooth, high-precision positioning with hollow-shaft routing.

  • Mobile robots & inspection: wheel/suspension actuation and sensor masts with hold-position brake.

  • Exoskeletons & rehabilitation devices: lightweight, high-torque joints.

  • Industrial/electrical & marine equipment: IP65 joint actuation in harsh environments.

Details

Ti5 Robot CRA Servo Joint PRO series specs feature model numbers, gear ratios, peak, load, and rated torque at 2000rpm, plus rated speeds for various configurations.

Ti5 Robot CRA Servo Joint PRO series specifications include model numbers, gear ratios, peak torque, load torque, rated torque at 2000rpm, and rated speeds across various configurations.

Ti5 Robot CRA Servo Joint, CRA-RI70-90-PRO-XX servo joint: 500W, 24-48V, CAN bus, 17 RPM encoder, 1.3kg, multiple gear ratios, up to 108 N·m torque, 594 g·cm² inertia.

CRA-RI70-90-PRO-XX servo joint specifications: 500W motor, 24-48V, CAN bus, 17 RPM encoder resolution, 1.3kg weight, multiple gear ratios, peak torque up to 108 N.m, 594 g·cm² inertia.

Ti5 Robot CRA Servo Joint, 500W servo joint, 24-48V, CAN bus, 17 RPM, 1.6kg, multiple gear ratios, includes torque/speed specs.

CRA-R170-90-PRO-XX-B servo joint specifications: 500W motor, 24-48V, CAN bus, 17 RPM encoder resolution, 1.6kg weight, multiple gear ratios with torque and speed data provided.

 

 

 

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