Dynamixel AX-18A Smart Serial Servo

SKU: TH0716 MPN: 902-0005-001
$109.00 Out of Stock
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  • Input voltage range 9.0V to 12.0V DC
  • Stall torque 1.8 N.m at 12V
  • AX-18A servo motor weighs around 56g (1.93 oz)
  • Integrated servo with motor, controller, driver, and network.
  • Ideal for a wide range of robotics & automation applications, from education to industrial use.
  • Features precise control, daisy chain networking, and real-time sensory feedback including position, speed, temperature, voltage, and load.

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The DYNAMIXEL AX-18A servo is a highly efficient, all-in-one solution that combines a DC motor, controller, driver, and network in a single package of 56g and 32 x 50 x 40 mm in dimension.It is rated for 9.0V to 12.0V DC provding 1.8 N.m (Newton-metre) of stall torque at 12V and 2.2A of stall current, also it has an RPM of 97 rev/min at 12V.

The AX-18A utilizes a TTL serial communication protocol, allowing for daisy-chaining multiple servos together to create complex servo systems with fewer wires. It operates at a range of baud rates, from 7,843bps to 1Mbps, giving speed and flexibility in communication.

It has a resolution of 0.29° deg/pulse and step of 1 pulse/rev offering precise control over movements, also the servo can be controlled in terms of position, speed and torque. It provides real-time feedback on various parameters including position, speed, temperature, voltage, and load. This capability is essential for advanced control schemes where monitoring and adjusting based on dynamic conditions are required.

Designed for versatility and ease of use, It stands out in the market due to its robust construction, precision control capabilities, and advanced features that cater to a wide range of robotics and automation needs.


Compliance Margins and Slopes: These settings adjust the servo's response stiffness to control commands, allowing for more fluid and natural movements.

Overload Protection: Built-in protection mechanisms guard against overload, overheating, and overvoltage conditions, ensuring long-term reliability and performance.

Upgradability: The servo firmware can be updated to incorporate new features or rectify existing issues, thereby extending the lifespan and utility of the device.

Whats in the Box?

AX-18A 1
B01-HORN (Assembled) 1
3P Cable 200mm 1
Bolt PHS M2x6 16
Bolt PHS M3x10 1
Nut M2 (N1) 16


Model Name AX-18A
Input Voltage 9.0V to 12.0V DC
11.1V DC Recommended
Stall Torque 1.8 N.m at 12V
Stall Current 2.2A 
No Load RPM 97 rev/min at 12V
No Load Current 0.17A
Standby Current 50mA
Resolution 0.29° deg/pulse
Step 1 pulse/rev
Angle 0 ~ 300°
Position Sensor Potentiometer
Motor Coreless
Baud Rate 7,843 bps ~ 1,000,000 bps (1 Mbps)
Gear Type Spur
Gear Ratio 254:1
Gear Material Engineering Plastic & Metal
Case Material Engineering Plastic
(Front, Middle, Back)
Command Signal Digital Packet
Protocol Type Half duplex Asynchronous Serial Communication
(8bit, 1stop, No Parity)
Physical Link TTL Level Multi Drop Bus
ID 254 (0 ~ 253)
Feedback Position, Temperature, Load, Input Voltage, etc.
Operating Mode Wheel: Endless Turns
Joint: 300° deg
Operating Temperature -5°C to 70°C
Dimension 32 x 50 x 40 mm
1.26 x 1.97 x 1.57 inch
Weight 56g (1.97 oz)


Connects to ground
1 Dynamixel AX-12A Pinout

Cconnects to 9.0 to 12.0V DC
DATA   3

Mechanical Drawing

Dynamixel AX-12A Mechanical Drawing


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