A4 Rotary Actuator  

The A4 incorporates all the design features that have made our 1 to 2-inch bore actuator line the standard in the industry for reliability and configurability. Floating pistons and a precision ground rack riding in replaceable sintered bronze bearings provide enhanced durability. The one piece, heat treated alloy steel pinion shaft is supported by large sealed ball bearings and it can be customized to suit your load. For double the output torque and zero backlash, consider our A42 rotary actuator. For the three-position version, see A42 3-position actuator.


Our biggest single-rack rotary actuator, tough, reliable, resilient, and extremely configurable, A4 rotary actuator

  • Very durable with floating pistons and bearing-supported rack
  • Shaft 1" or 1-1/8" diameter keyed or special size up to 35mm
  • Various shaft types and rotation angles up to 730 deg.
  • Optional hydraulic service or heavy duty construction
  • Optional washdown protection
  • Optional magnetic sensors with leads or M8 connectors
  • Optional rotation adjusters, bumpers, flow controls, cushions

Do not hesitate to contact us if you need help generating a valid part number or have questions about this product. Click on the button below to send us your question(s); or call us at (386) 676-6377 if you wish to speak to an engineer directly. We will be glad to assist!

Need help navigating our online CAD configurator or simply don't have or want to spend the time to generate the CAD file you need? Leave that to us! Click on the button below to request CAD files.

Delivering engineered solutions since 1967.
Rotomation is dedicated to providing reliable, extremely configurable, and fully rebuildable pneumatic actuators for automation. Custom and special actuators are our specialty.
Proudly Made in the USA!

Call Us: (386) 676-6377
Email Us:
11 Sunshine Blvd, Ormond Beach, FL 32174