PHD Series RI Low Profile High Force Rotary Actuator Review: Specs, Price and Applications

The PHD Series RI is a low-profile, high-force pneumatic rotary actuator with high torque and high axial and radial bearing loads. Its thru-hole shaft includes built-in air communication ports.
Internal air passages in the RI pinion couple air to other devices without external tubing, while the RIxH has a hollow pinion that protects and routes electrical cables and air lines. Standard delivery is two days.
Quick Verdict
A compact rotary axis that keeps hoses and cables tidy, ideal under grippers on robot tooling.
PHD Series RI Low Profile High Force Rotary Actuator at a Glance
Specification | Details |
Product type | Pneumatic rotary actuator |
Torque | High |
Bearing loads | High axial and radial |
Shaft | Thru-hole with air ports |
RI | Internal air passages in pinion |
RIxH | Hollow pinion for cables and air |
Delivery | Standard 2-day |
Price | Request a quote |
Design and Operating Principle
Routing air through the pinion lets a gripper mounted on the rotary receive air without hoses that wind up during rotation.
The RIxH hollow pinion carries cables for electric sensors or grippers.
High bearing capacity supports grippers and parts directly on the output.
Integration and Selection
Choose RI for air coupling or RIxH for cables. Calculate torque and inertia for rotation time.
Mount grippers directly on the output.
Industry Applications
Industry | Typical use |
Assembly | Rotating grippers |
Packaging | Product reorientation |
Electronics | Part flipping |
Automotive | Small part rotation |
Functional Uses
Gripper rotation
Air pass-through
Cable routing
Part reorientation
Pros and Cons
Advantages
Integrated air passage
Hollow pinion option
High bearing loads
Fast delivery
Limitations
Torque values not on A3
Rotation limits
Pneumatic supply needed
Who Should Consider the PHD Series RI Low Profile High Force Rotary Actuator?
The Series RI suits compact rotary axes on tooling.
Price and Availability
Price: Request a quote. PHD prices the Series RI by size, options and quantity. Budget for tooling, mounting, air supply, sensors and commissioning as part of the complete installation.
Further Reading
PHD Series RI Low Profile High Force Rotary Actuator FAQ
What is special about the RI shaft?
It has a thru-hole with built-in air ports.
What is the RIxH?
A version with a hollow pinion for cables and air lines.
Does it handle bearing loads?
Yes, high axial and radial loads.
Is torque high?
Yes, it is a high-force design.
What is standard delivery?
Two days.
How much does it cost?
Request a quote from PHD.





