HMC Series
43Pages

Precision Machinery Company Dual Displacement Radial Piston Staffa Motor

CONTENTS Specifications and Features Dual Displacement Radial Piston Hydraulic Motor 1-3. ain Port Connection Options M 2-2. Volumetric Efficiency Data 2-3. Shaft Power Calculations 2-5. Shaft Stress Limits 2-6. Bearing Life Notes 2-7. Circuit and Application Notes 2-8. Motor Operation at Low Temperatures 2-9. Crankcase Drain Connections 2-11. Constant Pressure Regulator (CP) Motor Type Continuous shaft power (kW) General Descriptions on the motor. Motor displacement can be changed with ease when the motor is running. The range of dual displacement motors extends from the HMC030 in 492...

Ordering Code 1-1 Model Coding Special Features Suffix / P * * * * * Fluid Type Blank Phosphate ester (HFD fluid) Water based fluids (HFA, HFB & HFC) Special Features Shaft Seal Enhancements Valve Enhancements High pressure shaft seal Improved cavitation resistance Non-catalogued features, (*****) = number assigned by Kawasaki as required Improved shaft seal life Alternative fluids contact Kawasaki High pressure shaft seal & improved shaft seal life Thermal shock resistance Improved caviation resistance & anti-clockwise Improved cavitation resistance & thermal shock resistance...

1-3 Main Port Connections Product type Product type Parallel keyed 55mm diameter shaft Splined shaft 17 teeth BS3550 SM3 = 1¼” symmetrical ports with through-holes for manifold connection Parallel keyed 55mm diameter shaft Splined shaft 17 teeth BS3550 SM3 = 1¼” symmetrical ports with through-holes for manifold connection Parallel keyed 60mm diameter shaft Splined shaft 14 teeth BS3550 F4 = SAE 1½" 4-bolt UNC flanges FM4 = SAE 4-bolt metric flanges Long taper keyed shaft - 95.2 key slot HMC125 SM3 = 1¼” symmetrical ports with through-holes for manifold connection Parallel keyed 85mm...

1-4 Special Features High Pressure Shaft Seal Description: High Pressure Shaft Seal > 10 bar rated > Recommended for cold climates Improved Shaft Seal Life Improved Cavitation Resistance Anti-pooling Bolt Heads Increased Starting Torque Anti-clockwise Rotation Thermal Shock Resistance Drain Port Adaptor - ½" BSPP > Rugged steel and PTFE construction Technical Information Where crankcase pressure will be higher than 3.5 bar, the high pressure shaft seal should be selected. Case pressure Marine-specification Primer Paint Maximum operating temperature Minimum operating temperature Ф21mm...

Improved Shaft Seal Life Improved Cavitation Resistance Description: > Stainless steel sleeve prevents corrosion > Recommended for overunning applications > Improved wear resistance > Protects against seal damage for short periods of operation in vacuum inlet conditions. > Recommended for corrosive environments Cavitation can occur due to many different factors. Although it is not possible to make the HMC motor resistant to cavitation, certain features can be added to improve the motor’s resistance to short periods of lost port pressure. Technical Information A well-established method of...

Anti-pooling Bolt Heads Increased Starting Torque > Removes potential for water pooling > Optimised for high break-out torque > Improved corrosion resistance > Recommended for low speed operation > Recommended for marine environments > Improved service life for low speed applications Technical Information Technical Information In many marine applications, water pooling in socket head cap screw heads presents a significant corrosion risk. Corroded cap screws can make service and repair of affected units impossible. If an application demands the drive motor be run at speeds of less than 10...

Increased Starting Torque (cont) Anti-Clockwise Rotation Volumetric Performance In order to achieve increased torque at low speeds the volumetric characteristics of the motor performance are changed. When calculating leakage and volumetric efficiency use the constants shown here in place of those given for the standard motor on page 29. Description: > Reduce installation complexity > Standardise equipment designs Geometric Displacement Zero Speed Constant Speed Constant Creep Speed Constant Crankcase Leakage Constant Technical Information All HMC motors can be specified with an...

1-4 Special Features Thermal Shock Resistance (cont) Thermal Shock Resistance Geometric Displacement Zero Speed Constant Speed Constant Creep Speed Constant Crankcase Leakage Constant Motor Type Description: > Recommended for cold climates > Optimised for start-up in freezing temperatures > Engineered for total peace of mind Technical Information Starting up a cold system with warm hydraulic fluid is a known cause of heavy wear and potential seizure of hydraulic machinery. To minimise this potential risk, the HMC motor can be configured to combat thermal shocks to give complete peace of...

Drain Port Adaptors Mounting Hole Diameter > Improves manufacturing logistics > Matching mounting holes to bolts > Motor supplied ready for connection to 1½" BSPP male fitting Technical Information Technical Information In different markets, different bolt standards are adopted which may not be best suited to the standard Ф20 mm mounting hole diameter on the HMC motors. To give a correct fit and optimum installation, Ф21 mm or Ф22 mm holes can be selected on larger frame sizes. Adaptor Supplied One or two drain adaptors can be supplied. Please contact Kawasaki to order this feature. Please...

Technical Information Marine Specification Primer Paint Performance data is valid for the range of HMC motors when fully run-in and operating with mineral oil. The appropriate motor displacements can be selected using performance data shown on pages 22 to 28. Refer to the table on this page for pressures and speed limits when using fire-resistant fluids. Description: > Improves corrosion and water resistance of the finishing system > Excellent adhesion strength Rating definitions Continuous rating For continuous duty the motor must be operating within each of the maximum values for speed,...