IA73BHLW HV Brushless 40KG High Torque Magnetic Waterproof Position Feedback Servo Motor
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For Robotics, Industry, Interactive Artwork, Small-scale Animatronics etc.

Beside the normal hobby servo, a special servo which can provide feedback could be more attractive. IA73BHLW is a modified version of A73BHLW standard size servo, providing access to feedback potentiometer through the additional fourth orange wire, which is capable to measure the output angle directly.

40KG high torque and metal gear chain design for heavy duty application. Simply hookup the analog feedback wire to any Analog pin of Microcontroller. With this position feedback function, you can ensure the servo has reached its designated position or detect any potential impediments, of course, this allows additional closed-loop control from your controller. Enable for more complex robotics or industry applications, such as determining when the servo has reached its target, detecting when the output is blocked, or implementing your own higher-level closed-loop position control.

Beside this IA73BHLW servo, we also have IA81BHLW, IB53BHU feedback servo with different feedback for selection. Custom spec is acceptable.


Full Aluminum Fast Cooling Case

Magnetic Waterproof IP67

2S LiPo High Voltage Capable

High Power Brushless Motor 

Separate Single Wire with JR Female Connector

Using Typical RC Servo Commands for Operation

Help to Implement Close-loop Position Control

Suitable for Robotics, Industry, Interactive artwork, Small-scale animatronics etc.

Standard 3-pin connector matching most popular modeling controllers and an additional servo position pin.


Model Name: IA73BHLW

Operating Voltage: 4.8-8.4V

Operating speed: 0.123sec/60° @ 6.0V

Operating speed: 0.110sec/60° @ 7.4V

Operating speed: 0.100sec/60° @ 8.4V

Stall Torque: 29 kg-cm (403oz-in) @ 6.0V

Stall Torque: 35 kg-cm (486 oz-in) @ 7.4V

Stall Torque: 40 kg-cm (556 oz-in) @ 8.4V

Gear: Steel

Motor: Brushless

Size: 40*20*37.5mm (1.57 x 0.78 x 1.47 in)

Weight: 76.6g

Connector Wire: JR Dupont 2.54* 4PIN 300mm / 22AWG

Position Signal Voltage: 300 to 3000 mV @180°