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Advanced Electromechanical Servo Actuators for Unmanned Aerial Vehicles
Contromax is a specialist developer of electromechanical servo actuators for UAVs (unmanned aerial vehicles). With over 15 years of experience in advanced motion control technology development, we provide high-precision solutions that can withstand the punishing conditions experienced during high-altitude and long-endurance unmanned flight.
Backed by a leading European motor supply partner, we can deliver our servo products in large quantities with short lead times.
The ServoMax product line has been created specifically to serve the needs of advanced UAV applications such as heavy-lift cargo drones and UAM (urban air mobility). The robust servos are ideal for a wide range of safety-critical applications such as control of wing surfaces, swashplates, brakes and payload bay doors.
The advanced designs utilize BLDC (brushless DC) and PMS (permanent magnet synchronous) motors in conjunction with analog Hall effect sensors and contactless encoders for precise control of rotor position maximizing efficiency, lifetime and minimizing jitter.
The rugged servos are constructed with hard-wearing hardened steel gears and an anodized aluminium housing. All models undergo a thorough regime of environmental testing to MIL-STD-810 and MIL-STD-461 standards, with some models also satisfying DO-160. These tests include the below, and were/are performed when deemed necessary:
 ServoMax 12 |
| Weight 40g |
| Rated Torque 2.6 kgf·cm |
| Max Torque 5.0 kgf·cm @ 25°C |
| Rated Speed 215°/s @ 7.4 VDC |
| PWM & CAN Interfaces |
 ServoMax 15 |
| Weight 75g |
| Rated Torque 7.2 kgf·cm |
| Max Torque 11.0 kgf·cm |
| Rated Speed 200°/s @ 7.4 VDC |
 ServoMax 20 |
| Weight 138g |
| Rated Torque 10 kgf-cm |
| Max Torque 13 kgf-cm |
| Rated Speed 100°/sec @ 14.8VDC |
| CAN2.0B Interface |
 ServoMax 25 |
| Weight 286g |
| Rated Torque 30 kgf-cm |
| Max Torque 48 kgf-cm |
| Rated Speed 150°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
 ServoMax 50 |
| Weight 345g |
| Rated Torque 50 kgf-cm |
| Max Torque 76 kgf-cm |
| Rated Speed 160°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
 ServoMax 100 |
| Weight 615g |
| Rated Torque 81 kgf-cm |
| Max Torque 124 kgf-cm |
| Rated Speed 140°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
 ServoMax 150 |
| Weight 885g |
| Rated Torque 132 kgf-cm |
| Max Torque 228 kgf-cm |
| Rated Speed 160°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
 ServoMax 300 |
| Weight 1.39kg |
| Rated Torque 255 kgf-cm |
| Max Torque 447 kgf-cm |
| Rated Speed 140°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
 ServoMax 500 |
| Weight 1.87kg |
| Rated Torque 400 kgf-cm |
| Max Torque 760 kgf-cm |
| Rated Speed 90°/sec @ 28VDC |
| Dual CAN2.0B Interfaces |
More information: Contromax Aviation-grade Servo Actuators
Weighing only 40g, ServoMax 12 delivers up to 5.0 kgf·cm torque with advanced DSP control. Its non-contact sensor ensures wear-free feedback and long-term reliability.
Built to defense-grade standards with full IP67 compliance, it thrives in extreme conditions. Optimized for drones and unmanned platforms, it enables long-endurance, high-efficiency missions.
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