Kpower EM3 TTL Robotic Servo Motor, 3 kg·cm Stall Torque at 8.4 V for Companion Robots

Kpower

$35.00 USD

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Version EM3

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Overview

The Kpower EM3 is a dual-axes robotic servo motor for companion robots, AI desktop robots and coordinated robot joints. TTL serial-bus communication enables independent control of multiple servos through one interface, with torque adjustment and real-time feedback. Weighing 9 g, it operates at 4.8–8.4 V and delivers 3 kg·cm stall torque at 8.4 V. An overload clutch provides gear protection during robot-joint operation.

Features

TTL Bus Control and Feedback

Integrated TTL serial bus connects multiple servos through a shared cable and single interface.
Independent servo control supports coordinated multi-joint movement.
Force-controlled servo operation with precise torque adjustment and real-time feedback.
Multiple feedback functions are supported.
Recessed three-contact connector on the side of the housing.

Dual-Axes Construction and Overload Clutch

Dual-axes robotic servo design.
Overload-clutch disengagement and gear-clutch anti-impact protection for robot joints.
POM gears, plastic housing and potentiometer position sensing.
Brushed DC motor with carbon brushes described as long-life, plus high-strength, high-temperature-resistant magnetic construction.

Specifications

Parameter	EM3 value
Control interface	TTL serial bus
Stall torque	3 kg·cm at 8.4 V
Rated torque, reported value	0.8 kg; lever-arm unit not specified
No-load speed	0.08 s/60° at 8.4 V
Operating voltage	4.8–8.4 V
No-load current	1000 mA
Stall current	1000 mA
Weight	9 g
Dimensions	28.5 × 12 × 22.5 mm
Wire length	60 mm
Horn gear spline	N/A
Gear material	POM
Motor	Brushed DC
Position sensor	Potentiometer
Case material	Plastic
Ball bearings	2BB
Working frequency	50–333 Hz
Operating temperature	−10 to 50°C
IP rating	IP42
Noise level	≤65 dB; measurement conditions not specified

Customization Requirements

Consult the supplier about travel-angle customization and requirements for wire length, control type and position sensor.

Applications

Companion robots and AI desktop robots: coordinate several servo-driven joints through one TTL interface while retaining independent control and real-time feedback.
Pet robot toys: use the 9 g servo for articulated movement, with an overload clutch to help protect joint gearing against impacts.
Wheel-drive robot assemblies: control articulated mechanisms within the robot using shared-bus servo coordination.
Eilik Smart Robot: suitable for robot-servo applications requiring the EM3's compact construction and overload-clutch mechanism.