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GM-20 High Capacity Gimbal Mount

Newmark’s precision high capacity gimbal mount is designed for general purpose pointing, motion simulation, scanning, and tracking applications for large optics, antennae and other sensors.

Key Features
    • Large Payload Size: With a wide inner yoke span of 500mm, the GM-20 capable of carrying large cameras, sensors, or other equipment.
    • High Output Torque: Each drive unit utilizes a high torque motor coupled to an 80:1 precision worm gear.
    • Gear train materials selection: The worm shaft is made of hardened steel and precision ground, ensuring durability and high precision. It is mated to an aluminum-bronze alloy worm wheel for its excellent wear resistance and low friction characteristics.
    • Motor options: The GM-20 gimbal mount is available with NEMA 23 stepper motors or NEMA 23 brushless servo motors.
    • Slip Ring Option: A slip ring can be added to one or both axis to allow 360° continuous rotation without any cable wrap issues.

Need something specific? Contact us to discuss a custom gimbal solution.


GM-12 Large Gimbal Mount

Typical lead-time: 6 Weeks
Part No. N/A
0.32 arc-sec (stepper motor), 4.05 arc-sec (servo motor)
±72 arc-sec
Max. Speed
20°/sec (stepper motor), 80°/sec (servo motor)
Repeatability (uni-directional)
5 arc-sec (uni-directional), 40 arc-sec (bi-directional)
Max. Output Torque
17 Nm (150 lb-in)
Max Payload Weight
36.3kg (80 lbs)
Travel Range
Azimuth: ± 90° , Elevation: ±90° , Other travel ranges are available
Optical rotary encoder mounted to rear of motor, 4000 CPR with Index
Limit Switches
Optical end of travel limit switches on both axes
Optical home switch located in the middle of travel.
Optical index mark on encoder
Gear Ratio
Gimbal Weight
29.5 kg (65 lbs)
Aluminum Alloy Construction
Black Anodize
Motor Options


Size 23 Stepper Motor
  • NEMA 23 high torque stepper motor
  • 2.8 Amp/Phase
  • 1.8 degrees/step
  • Compatible with the following motion controllers:
    NSC-A1 Series | NSC-G Series
Nema 23 Brushless Servo Motor
Size 23 Brushless DC Servo Motor
  • NEMA 23 brushless DC servo motor
  • 4000 Count/rev optical rotary encoder with index mark
  • Continuous Torque: 0.81 Nm (116 oz-in)
  • Compatible with the following motion controller: NSC-G Series
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