A42 Rotary Actuator

The A42 is our biggest rotary actuator and it features a one-piece heat-treated alloy steel pinion shaft, two racks for zero backlash at end of stroke, and billions of flexible standard configurations


With over 60 times more torque capacity than our A032 Rotary Actuator, the A42 is our largest rotary actuator. Its tie rod construction provides for a virtually unlimited number of possible combinations of standard, readily available options that could be installed either on the top or bottom cylinders as needed. With oversized ball bearings and a one-piece, heat-treated alloy steel pinion shaft, this extremely rugged, versatile actuator is an excellent choice for demanding medium to large applications.


  • 2-Position Rotary Actuator
  • Bore Size = 2"
  • Standard Rotations = 15 Angles from 30 to 730 degrees
  • Shaft Sizes = Standard: 1.000" dia. or 1.125" dia., Options: D 1.000" dia., D 1.125" dia., & HS .750" I.D.
  • Torque at 80 psi = 554 in-lbs.
  • Ball Bearing Ratings = Radial: 2,020 lbs., Axial: 500 lbs.
  • Port Size = 1/4 NPT
  • Available Options:
    • Adjustable Rotation
    • Cushions
    • Double Ended Shafts
    • Flow Controls
    • Heavy Duty (Aluminum Cylinders, Option A or Steel Cylinders, Option K)
    • Hollow Shaft
    • Washdown Protection
    • Mount Plates
    • Magnetic Switches Installed & Tested Prior To Shipping
    • Bumpers
    • Hydraulic Service Seals
    • Fluorocarbon Seals
    • Fluorocarbon Hydraulic Service Seals

See the A42 Rotary Actuator Part Number page for detailed configuration and option information.

Looking for the 3-Position version, see A42 3-Position Rotary Actuator.

If you need precise unidirectional sequential steps, jump to X4 Indexing Actuator.

Compare All Dual Rack Tie Rod Rotary Actuators



  • Billions of possible configurations at your fingertips
  • Various rotation angles to choose from, up to 730° or special
  • Select between 1" or 1-1/8" diameter solid shaft, or 3/4" I.D. hollow
  • Optional magnetic switches in various configurations
  • Optional rotation adjusters, bumpers, flow controls, cushions

 Use our online configurator for the A42 actuator.

Find a distributor for Rotomation in your area.

Have questions?  Call us at 386-676-6377 or click.