SBG Systems Stellar-40

Contromax

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Precision Motion. Proven for Flight. Aviation-Grade Electromechanical Servo Actuators for UAVs, AAM and Uncrewed Systems Korea South
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Contromax

Precision Motion. Proven for Flight. Aviation-Grade Electromechanical Servo Actuators for UAVs, AAM and Uncrewed Systems

Contromax is a South Korean developer and manufacturer of aviation-grade electromechanical servo actuators for UAVs, advanced air mobility platforms and a wide range of uncrewed systems.

ServoMax

Aviation-grade Servo Actuators

ServoMax® Series integrates high-performance motors, precision gearing, drive electronics and control algorithms into a single system for precise and stable motion control. Its broad product range supports platforms from small UAVs to large uncrewed aircraft and advanced air mobility applications. Contromax also provides customization of torque, speed, communication interfaces, form factor, servo horn and surface finish to suit each platform and operating environment.Aviation-grade servo actuatorsServoMax® Series supports safety-critical functions including flight-control surfaces, swashplates, tail-rotor control, steering systems, brakes, landing gear, payload bay doors and release mechanisms. Its integrated architecture features low-jitter control, backlash of 0.3° or less, contactless position sensing and model-specific CAN, PWM, RS-485 and dual-CAN interface options.

Contromax operates an AS9100D-certified quality management system. Depending on the model and customer requirements, environmental, EMC and performance testing can be supported based on applicable items of MIL-STD-810, MIL-STD-461 and DO-160. Available capabilities include temperature, humidity, altitude, vibration, shock, acceleration, salt fog, dust, rain, EMC, endurance and frequency-response testing. Manufacturing and inspection processes incorporate applicable IPC Class 3 workmanship and quality-control requirements.

ServoMax 15 actuator ServoMax15
Weight ≤80 g
Rated Torque ≥7.0 kgf·cm
Max Torque ≥11.0 kgf·cm
Rated Speed ≥300°/s @ 28 VDC
PWM and CAN
ServoMax 20HD actuator ServoMax20HD
Weight ≤156 g
Rated Torque ≥12 kgf·cm
Max Torque ≥24 kgf·cm
Rated Speed ≥242°/sec @ 28VDC
PWM with voltage feedback, RS-485 and CAN
ServoMax 25AD actuator ServoMax25AD
Weight ≤260 g
Rated Torque ≥30 kgf·cm
Max Torque ≥43 kgf·cm
Rated Speed ≥170°/sec @ 28VDC
PWM and CAN
ServoMax 50 actuator ServoMax50
Weight ≤400g
Rated Torque ≥50 kgf·cm
Max Torque ≥80 kgf·cm
Rated Speed ≥150°/sec @ 28VDC
Dual CAN 2.0A/B
ServoMax 100 actuator ServoMax100
Weight ≤625g
Rated Torque ≥81 kgf·cm
Max Torque ≥124 kgf·cm
Rated Speed ≥140°/sec @ 28VDC
Dual CAN 2.0A/B
ServoMax 150 actuator ServoMax150
Weight ≤890g
Rated Torque ≥132 kgf·cm
Max Torque ≥228 kgf·cm
Rated Speed ≥160°/sec @ 28VDC
Dual CAN 2.0A/B
ServoMax 220 actuator ServoMax220
Weight ≤1.1 kg
Rated Torque ≥250 kgf·cm
Max Torque ≥350 kgf·cm
Rated Speed ≥270°/sec @28VDC
Dual CAN 2.0A/B
ServoMax 300 actuator ServoMax300
Weight ≤1.45 kg
Rated Torque ≥255 kgf·cm
Max Torque ≥447 kgf·cm
Rated Speed ≥140°/sec @ 28VDC
Dual CAN 2.0 A/B
ServoMax 500 actuator ServoMax500
Weight ≤1.9 kg
Rated Torque ≥400 kgf·cm
Max Torque ≥800 kgf·cm
Rated Speed ≥90°/sec @ 28VDC
Dual CAN 2.0A/B

Products

ServoMax15
ServoMax15

Ultra-lightweight, high-response aviation-grade servo actuator for small UAVs

ServoMax20HD
ServoMax20HD

High-response UAV servo actuator with multiple interface options

ServoMax25AD
ServoMax25AD

High-torque, dual-interface servo actuator for UAV flight control

ServoMax50
ServoMax50

Aviation-grade servo actuator with dual-CAN communication

ServoMax100
ServoMax100

High-torque aerospace-grade servo actuator for precision motion control in large UAVs

ServoMax150
ServoMax150

High-torque aviation-grade servo actuator for large UAVs

ServoMax220
ServoMax220

High-performance servo actuator for large UAV and AAM platforms

ServoMax300
ServoMax300

High-torque servo actuator for large UAVs and uncrewed systems

ServoMax500
ServoMax500

Aviation-grade servo actuator for heavy-duty control in large UAV and AAM platforms

Articles

Contromax Confirms Attendance at Drone Show Korea 2026
Latest
Contromax Confirms Attendance at Drone Show Korea 2026

Contromax will be attending Drone Show Korea, taking place from February 25 to 27 in Busan, Republic of Korea, where the company will be exhibiting at booth I09

Feb 11, 2026
Contromax to Deliver Advanced Servo Actuators for Aerospace Applications
Contromax to Deliver Advanced Servo Actuators for Aerospace Applications

Contromax has secured a $3 million contract with a Singapore-based partner to supply its ServoMax® Electro-Mechanical Servo Actuators (EMAs), designed for precise, safety-critical control in UAVs operating in aerospace and defense applications

Oct 02, 2025
High-Precision Electromechanical Servo Actuators for UAVs
High-Precision Electromechanical Servo Actuators for UAVs

Contromax’s robust servos are ideal for a wide range of safety-critical applications, such as control of wing surfaces, swashplates, brakes and payload bay doors

Apr 29, 2025
Regional Offices & Locations
Contromax Headquarters Korea South 48-37, Eungubinam-ro 7beon-gil, Yuseong-gu, Daejeon, 34087, Republic of Korea +82.42.822.0630 Contact Contact Website
Contromax Regional Office Korea South 22, Changwon-daero 18beon-gil, Uichang-gu, Changwon-si, Gyeongsangnam-do, Republic of Korea +82.55.262.0301 Website
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