HTR Hydraulic Rotary Actuators For working pressures up to 210 bar

Rotary Actuators HTR Series HTR Series heavy duty hydraulic rack and pinion rotary actuators convert fluid power into rotary motion. They are suitable for a wide variety of applications, including material handling and valve actuation, in industries as diverse as machine tools, primary metals, mining and oil field equipment. HTR Series rotary actuators are designed for slow speed rotation, applying high torque to the movement of large masses. They employ conventional tie rod cylinder construction and are rated for use at working pressures up to 210 bar. The pinion and output shaft are supported...

Design Features and Benefits Rotary Actuators HTR Series Maximum strength and shock resistance result from the use of through-hardened chrome alloy steel for the rack and for the one-piece pinion and output shaft. Gears are packed with molybdenum disulphide grease on assembly, to reduce wear and prolong gear life under conditions of extreme pressure. Proven tie rod construction, using standard cylinder bore sizes, guarantees reliability and ease of maintenance for the hydraulic cylinders which drive the rack and pinion. Heavy-walled alloy steel tubing is micro-finished for long piston and seal...

Rotary Actuators HTR Series Benefits and General Specifications Advantages of Parker's Rack and Pinion Rotary Actuators General Specification – Volumes Model Single Rack • Cost-effectiveness – especially above 90°, where linear actuators need increasingly intricate linkages to generate rotary motion. Double Rack • Leakage resistance – pressurized fluid is remote from the output side of the mechanism; piston seals are the only dynamic seals subject to system pressure. • Ease of maintenance – servicing of pistons and seals can be carried out with the actuator in place on the machine, subject to...

Rotary Actuators HTR Series Shaft Options Shaft Options Keyed and splined shaft designs are available for the HTR Series rotary actuators, in both male and female forms. The standard male, twin key shaft style is illustrated with other major dimensions on pages 6 and 7, while other shaft options are shown below. All the shaft options illustrated are shown in the mid-stroke position. Custom designs, including doubleended shafts, are available to special order – please contact the factory for details. Male Splined Shaft to DIN/ISO 14 Male Splined Shaft L Mounting Face of Unit Female Keyed Shaft...

Rotary Actuators HTR Series Relief Valve HTR.9 to HTR5 Single Rack Models Relief Valve HTR1.8 to HTR10 Double Rack Models Dimensions – with Face Mount and Male Keyed Shaft Model HTR.9 HTR1.8 All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Europe

Rotary Actuators HTR Series Relief Valve HTR15 to HTR300 Single Rack Models Relief Valve HTR30 to HTR600 Double Rack Models Dimensions – with Face Mount and Male Keyed Shaft Model HTR.9 HTR1.8 * G1/8 when combined with a stroke limiter – see page 11. All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Europe

Rotary Actuators HTR Series Mountings, Ports and Air Bleeds Base and Pilot Mountings HTR Series rotary actuators are available with the options of face, base or pilot mounting styles, to suit the requirements of different applications. Mounting dimensions for the face mounting styles are shown with other major dimensions on pages 6 and 7. The equivalent dimensions for base and pilot mounting styles are shown in the table. Base Mounting Pilot Mounting Pilot Mounting Base Mounting Port Sizes and Positions The standard port style for HTR Series rotary actuators is a BSP (parallel) port, but NPTF,...

Rotary Actuators HTR Series Cushions and Cushion Adjustment Location For a load that moves in the horizontal plane, only the kinetic energy need be considered. If the load is to move vertically, then the potential energy change of the load during cushioning must also be taken into account. Both conditions are described by the following equations. The resulting figure for energy to be absorbed can then be applied to the graph of Cushion Energy Absorption Capacity, to identify a rotary actuator with adequate cushion capacity. Note: the graph of Cushion Energy Absorption Capacity should only be...

Rotary Actuators HTR Series Cushioning High Performance Cushions Cushion Energy Absorption Capacity – All Cushion Options The High Performance cushion option can only be specified on double rack rotary actuators. Double rack rotary actuators can achieve very high torques, to move large masses which need to be decelerated at the end of travel. This cushion energy is absorbed efficiently by the use of High Performance cushions. External piping ensures that during cushioning the maximum deceleration torque is available. External interconnecting pipework for the High Performance cushion is not supplied...

Rotary Actuators HTR Series Piston Seals, Seal Kits and Stroke Limiters Piston Seals and Seal Kits become over-pressurized. Any external leakage from the gear housing, therefore, is indicative of worn or damaged piston seals and these should be examined and, if necessary, replaced, at the earliest opportunity. The Wear-Pak piston fitted as standard to all HTR Series rotary actuators employs a polyurethane seal to contain hydraulic pressure, and a PTFE wear ring (not for HTR.9 or HTR1.8) to prevent metal-to-metal contact. For higher temperatures or use with synthetic fluids, FPM seals should be...

Rotary Actuators HTR Series Bearing Load Capacity Bearing Load Capacities The radial and thrust loads and overhung moments which can be supported by each model of HTR rotary actuator at different operating pressures are shown in the table. These figures should be read in conjunction with the notes below. Notes 1 Static bearing load capacities = dynamic values x 1.5 2 Standard male shafts provide a 4:1 design factor. At the operating conditions marked *, a smaller design factor is achieved and the values listed are 'bearing' moment capacities. For higher capacities, larger shaft sizes are available...