Hydraulic Repair Iowa - Social Proof
410 Freel Dr Ste 102, Ames, IA 50010 515-292-2599

7 day turnaround time guaranteed or its free

Highest-Rated and Most Reviewed Hydraulics Company in America

5 Stars

Read Reviews

Get Added to Our Waitlist Now

This field is for validation purposes and should be left unchanged.

7 Day Rebuild Time Guaranteed or It’s Free

If we cannot rebuild your hydraulic cylinder or pump within 7 days its free.
This does not include if you need parts machined.

Schedule Your Free First Service Call

Radial Piston-Type Hydraulic Motors

Radial piston hydraulic motors convert fluid pressure energy into rotational mechanical energy. Central to their design is a stationary directional valve, equipped with two fluid pathways: one for fluid intake and another for drainage. Situated in this valve is a rotor with radial bores, which propels free-floating pistons into action.

These pistons interact with a stationary track and, due to their movement relative to the rotor, undergo a reciprocating motion. To ensure consistent torque delivery, an odd number of cylinders is typically installed.

Pressurized hydraulic fluid, supplied by a pump, enters the bores and pushes the pistons against the stator for half of each revolution. For the subsequent half, the hydraulic cylinder rebuild Colorado fluid is directed to the drainage line linked to the directional valve. If the motor operates under pressure load, the stator applies force to the pistons, leading the pistons and rotor to rotate. This action drives the motor’s output shaft. Many of these systems incorporate rollers to minimize frictional losses between the piston and track.

Characteristics of Radial Piston Hydraulic Motors:

  • Capable of delivering high torque outputs.
  • Simplifies the system design by potentially eliminating gearboxes.
  • Offers smooth rotational speeds even at lower rates.
  • Operates at reduced rotational speeds.
  • Axial Piston-Type Hydraulic Motors


Also referred to as barrel motors, axial piston hydraulic motors feature a drive shaft plate set at an angle relative to the motor’s barrel. When fluid fills the cylinders, it prompts piston movement, which in turn rotates the drive. Each cylinder experiences one intake and one output phase per rotation. The piston’s force, applied to the slanted plate, is directly proportional to the fluid’s pressure. This force, acting on the angle, generates a rotational force on the plate.

The rotation direction of the drive shaft corresponds to the inclination angle of the drive shaft plate relative to the barrel’s axis. Some axial piston assemblies allow for adjustment of this inclination. If modifiable, the rotation speed can be varied at a consistent flow rate, resulting in a bi-directional flow motor.


Attributes of Axial Piston Motors:

  • Capable of high-speed operation.
  • Possesses a high power-to-size ratio.
  • Supports a broad spectrum of speeds.
  • Features several controls for displacement modifications.
  • Can be designed for either variable or fixed displacement.
  • Offers a diverse speed range.


Uses of hydraulic cylinder rebuild Colorado Motors

Hydraulic motors have diverse applications as outlined below:

External Gear Motor Applications:

  • Mobile hydraulic systems
  • Cooling fans
  • Spiral conveyors
  • Farming equipment (especially for belt drives)
  • Mixing plates

Internal Gear Motor Applications:

  • Mobile hydraulic systems
  • Cooling fans
  • Spiral conveyors
  • Farming equipment (especially for belt drives)
  • Mixing plates

Vane Hydraulic Motor Applications:

  • Industrial machinery
  • Farm machinery
  • Mobile equipment
  • Injection molding machinery
  • Power screwdrivers

Radial Piston Hydraulic Motor Applications:

  • Driving construction and mobile machinery
  • Operations requiring high pressure
  • Plastic processing machinery, like presses
  • Clamping hydraulic systems

Axial Piston Hydraulic Motor Applications:

  • Shipyard cranes
  • Winch systems
  • Driving construction and mobile machinery
  • Both onshore and offshore operations


Factors to Consider When Selecting a Hydraulic Motor

In designing an effective system, it’s essential to pick the right hydraulic motor. The chosen motor should align with the system’s requirements. If there’s a mismatch, it could compromise the system’s performance. Here are some considerations:

Load Specifications:

Understanding the load requirements is paramount. System designers should first determine the magnitude of the load. Once this is identified, other system specifications can be tailored accordingly.

Type of Motor:

Different hydraulic cylinder rebuild Colorado motors have distinct operational characteristics tailored for specific applications. It’s crucial to understand the motor’s specifications as provided by the manufacturer.

Motor Speed:

For instance, if a motor is crafted for high-speed operations but is employed in a low-speed application, this could strain and reduce the motor’s lifespan. It’s pivotal to align the motor’s operational capacity with the system’s load requirements.


Is the Motor’s Displacement Adjustable or Static?

Hydraulic motors can have either a static or an adjustable displacement, depending on their design and intended application. Recognizing the application’s requirements aids in selecting the right motor. How does the motor handle flow and operating pressure? In the realm of hydraulic motors, elevated operating pressures produce a greater force, which consequently leads to increased torque.


Potential for Fluid Leakage

Leakage refers to the unintentional escape of fluid from a system, often through tiny openings like cracks or holes. A motor with a high propensity for leakage poses greater risks. Motors with high leakage potentials might not be suitable for handling delicate tasks due to their susceptibility to failure.


Tolerance for Noise in the Application

Hydraulic motors find utility in diverse applications and are crafted from various materials, influencing their response to operational conditions. Some hydraulic cylinder rebuild Colorado motors, built robustly, can endure vibrations and rigorous environments, making them ideal for industrial settings.


Is the Motor Design Trustworthy?

The architecture of motors varies. Some are versatile, operating within broad parameters, while others have stringent specifications related to pressure, speed, and temperature. Understanding these nuances aids in both system design and the selection of an appropriate motor.


Control Mechanisms: Are They Mechanical or Digital?

The control systems integrated into hydraulic cylinder rebuild Colorado motors can be either mechanical or digital, hinging on the user’s preferences and factors like energy usage and the benefits of automation.


Necessity for Maintenance

While certain motor designs might offer high efficiency, they might also demand regular upkeep. The lifespan of some motors can be compromised without consistent maintenance. For instance, axial piston motors generally need more frequent maintenance compared to gear motors.


Bearing Types and Their Durability

Understanding the lifespan of a motor and the associated bearings aids in application and maintenance planning. Using a hydraulic cylinder rebuild Colorado motor with a short life expectancy in complex machinery may not be practical. The choice of bearings for the rotor and shaft hinges on the generated forces and torque, as bearings are selected based on the forces exerted on their surfaces.


Setting Up and Maintenance

Prior to selecting a motor, it’s crucial to consider its installation requirements. Some motors demand specialized skills and are intricate to set up. Engaging with experts to discuss potential additional costs before procuring a hydraulic motor is advisable.