HTR Series - Hydraulic Rotary Actuators

The HTR Series rotary actuator incorporates many hydraulic and mechanical features that make this actuator robust and ideal for the most demanding high production applications. Features include: high load capability tapered roller bearings; a chrome alloy steel rack and pinion gear set; a high strength ductile iron or steel housing; and proven Parker Hannifin cylinder components. The HTR Series actuators have been successfully employed in multiple applications including automotive plant production machinery; machine tool equipment; plastics and rubber processing machinery; basic metals production machinery and in material handling machinery.

The HTR Series can be employed as an integral machine component, where the actuator can simultaneously transmit torque and support the line shaft or the load. Such an arrangement allows for the elimination of one set of external support bearings. Optional cushions can also be incorporated to decelerate external loads, thus eliminating the need for an external deceleration device such as shock absorbers or brakes. Additionally, machine installations can be simplified with the hollow shaft feature by eliminating additional coupling. This is achieved by means of a square shaft key or if needed the housing can be drilled and tapped to mount various brackets. For easy serviceability, the piston seals can be inspected and replaced while the actuator remains installed on the machinery.

Rack and pinion design provides excellent efficiency characteristics (90-95%) and minimizes Hydraulic Power Unit Size Minimal heat build-up, limits the need for heat exchangers Large hollow gears offer more shaft options HTR series are designed for low wear on dynamic seals and longer life Excellent in high speed production applications

• Output torques @ 3000 psi (207 bar): 900 lb.-in to 600,000 lb-in. (larger output torques available upon request)
• Maximum operating pressure: 3000 psi (207 bar) non-shock (Except HTR22/45: 2000 psi (138 bar) non-shock)
• Operating temperature range: Nitrile seals: -40° to 180°F or -40° to 82°C. Fluorocarbon seals: -20° to 250°F or -29° to 121°C
• Standard rotations: 90°, 180°, 360°, 450°
• Rotational tolerance: -0°, 2°
• Maximum breakaway pressure: 70 psig or 4.8 bar
• Mounting orientation: unrestricted
• Standard timing: Keyway in 12:00 position at mid stroke
• Recommended filtration: ISO class 17/14 or better
• Hydraulic cushions to minimize noise, vibration shock and assist deceleration control
• Reed, Hall Effect or proximity switches for position sensing
• End-of-rotation stroke adjusters for load position control and accurate rotation adjustment
• Built-in meter out flow control valves with reverse flow check valves provide a neat package
• Three position option can be used with many special machine and material handling applications