Cryogenic Fine Positioning Linear Actuator

The Cryogenic Fine Positioning Actuator product is designed to produce very small linear output steps using conventional actuator technology. Actuation is accomplished by using a small angle stepper motor coupled to a large gear reduction transmission. The linear excursion is accomplished with a fine preloaded leadscrew mechanism to eliminate backlash.



Key Features:

  • High resolution and accuracy
  • Redundant, 3-phase stepper motor
  • High gear ratio gear transmission
  • Sealed bellows assembly at the output
  • Drive components based on existing heritage hardware
  • Designed to operate in Cryogenic space environment
  •  Pre loaded 2 piece output member


Physical Characteristics
Dimensions 1.4 in. diameter and < 6.6 in. length


< 1.2 lbs
Range of Travel 0.45 inch

Position Accuracy

47 micro inches over 7200 linear steps
Linear Resolution 17 micro-inches
Linear Velocity 0.0035 inch/sec (nominal)
Physical Characteristics
Power Consumption 8 watts max.

Related Markets


Moog has designed and manufactured components and systems for satellites and launch vehicles for more than 60 years.

Spacecraft Technologies

Moog is a proven leader in components, subsystems, and systems for spacecraft of all sizes, from smallsats to GEO spacecraft. Moog has been successfully providing spacecraft controls, inspace propulsion, and major subsystems for science, military, and commercial operations for more than 60 years.

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