Hydraulic Orbital Motors and Steering Control Units

Hidroman supplies hydraulic orbital motors and steering control units for mobile hydraulic equipment, agricultural machinery, construction equipment, material handling systems, and specialized hydraulic applications.

Hydraulic orbital motors convert hydraulic energy into rotary motion and are designed to deliver high torque at low and medium speeds. Steering control units, also known as hydraulic steering valves or orbital steering units, provide controlled hydraulic flow for hydrostatic steering systems.

With different displacement, pressure, flow, shaft, and mounting configurations available, the right hydraulic orbital motor or steering control unit can be selected according to the machine's operating requirements.

Hydraulic Orbital Motors

A hydraulic orbital motor is a hydraulic motor designed to provide controlled rotary motion from pressurized hydraulic fluid. Its compact design, high starting torque, and reliable low-speed performance make it suitable for many mobile hydraulic applications.

Hydraulic orbital motors are commonly used where direct hydraulic drive is required and where the application demands controlled speed and high torque.

Key Features

• Displacement options from 10 to 2,000 cm³/rev
• Pressure options up to 420 bar, depending on model and application
• High starting and low-speed torque
• Compact and durable construction
• Suitable for mobile hydraulic systems
• Multiple shaft and mounting configurations
• Different port and connection options
• Suitable for continuous or intermittent operation, depending on model
• Available for OEM and custom machine applications

Important: Maximum pressure, flow, speed, torque, and operating conditions vary by motor model. Product selection should always be based on the manufacturer's technical specifications and the actual hydraulic system requirements.

Hydraulic Steering Control Units

A hydraulic steering control unit, also commonly called an orbital steering unit or hydraulic steering valve, controls hydraulic oil flow between the steering system and steering cylinder.

When the operator turns the steering wheel, the steering control unit meters hydraulic oil to the appropriate side of the steering cylinder. This allows smooth and controlled steering without requiring a direct mechanical connection between the steering wheel and the steering cylinder.

Hydraulic steering control units are widely used in mobile machinery where reliable hydrostatic steering is required.

Applications

Hydraulic steering control units can be used in:

• Tractors
• Agricultural machinery
• Harvesting equipment
• Sprayers
• Construction equipment
• Forklifts
• Material handling equipment
• Utility and municipal vehicles
• Forestry equipment
• Off-road machinery
• Specialized mobile equipment
• Custom hydraulic steering systems

Where Are Hydraulic Orbital Motors Used?

Hydraulic orbital motors are suitable for applications requiring controlled hydraulic rotary motion and high torque at relatively low speeds.

Typical applications include:

Agricultural Machinery

Orbital motors are commonly used in agricultural equipment for wheel drives, conveyors, augers, feeding systems, harvesting equipment, and other auxiliary hydraulic functions.

Construction Equipment

Construction and off-road equipment can use orbital motors for auxiliary drives, conveyors, attachments, winches, and other hydraulic functions.

Material Handling

Hydraulic orbital motors can provide compact hydraulic drive solutions for conveyors, rollers, handling systems, and specialized equipment.

Forestry and Specialized Equipment

The high torque and compact configuration of orbital motors make them suitable for demanding mobile hydraulic applications.

How to Select a Hydraulic Orbital Motor

Selecting the correct hydraulic orbital motor requires more than matching the motor's physical dimensions. The hydraulic system and machine operating conditions should be evaluated together.

1. Motor Displacement

Displacement is specified in cm³/rev and has a direct relationship with motor speed and torque.

For a given hydraulic flow, a larger displacement generally results in lower motor speed and higher theoretical torque.

2. Hydraulic Flow

The available hydraulic flow determines the operating speed of the motor. Both continuous and maximum flow should be considered.

3. Operating Pressure

The motor's continuous and maximum pressure ratings must be compatible with the hydraulic system.

Operating a motor beyond its rated pressure can significantly reduce component life and may result in system failure.

4. Required Torque

The required output torque should be calculated according to the machine load, starting conditions, and operating requirements.

5. Required Speed

The required minimum and maximum RPM should be compared with the motor's permissible operating speed.

6. Duty Cycle

Continuous, intermittent, and high-load applications can have different motor selection requirements. The expected duty cycle should therefore be considered during product selection.

7. Shaft and Mounting Configuration

Shaft dimensions, flange configuration, hydraulic ports, mounting dimensions, and rotation requirements must match the machine design.

Hydraulic Orbital Motor Displacement, Flow, Speed and Torque

Four parameters are particularly important when selecting a hydraulic orbital motor:

Pressure + Flow + Displacement + Required Torque/Speed

Motor displacement affects both speed and torque.

As a general engineering principle:

• Higher displacement can provide higher torque at the same pressure.
• Higher hydraulic flow can increase motor speed.
• Higher system pressure can increase available torque within the motor's rated limits.
• Motor efficiency affects the actual output torque and speed.

For this reason, choosing a hydraulic orbital motor based only on pressure or displacement is not sufficient.

The complete hydraulic circuit and machine operating conditions should be evaluated before selecting the motor.

Hydraulic Steering Control Unit Selection

Selecting a hydraulic steering control unit requires consideration of the entire steering circuit.

Important parameters include:

• Steering system pressure
• Pump flow
• Steering cylinder volume
• Steering unit displacement
• Steering wheel turns
• Required steering response
• Port configuration
• Mounting dimensions
• Relief valve requirements
• Priority valve requirements
• Machine operating conditions

The correct steering control unit should provide the required steering response while remaining compatible with the hydraulic pump, steering cylinder, and other components.

Why Proper Hydraulic Component Selection Matters

Incorrect hydraulic component selection can lead to:

• Insufficient torque
• Excessive motor speed
• Slow machine response
• Excessive heat generation
• Higher energy consumption
• Poor steering response
• Premature component wear
• Hydraulic system instability

For OEM and machine manufacturers, selecting the correct component during the design stage can help improve system reliability and reduce maintenance requirements.

Hidroman Hydraulic Orbital Motor and Steering Solutions

Hidroman provides hydraulic component solutions for OEM manufacturers, mobile equipment, industrial machinery, and specialized hydraulic applications.

For hydraulic orbital motors and steering control units, product selection can be evaluated according to:

• Machine type
• Required torque
• Required speed
• Hydraulic flow
• Operating pressure
• Motor displacement
• Steering cylinder specifications
• Mounting requirements
• Shaft configuration
• Hydraulic port configuration
• Operating environment
• Duty cycle

For OEM projects, the hydraulic circuit and application requirements can be reviewed to determine the most appropriate component configuration.

Hydraulic Orbital Motors for OEM Applications

OEM machinery often requires hydraulic components to match specific performance and installation requirements.

Hidroman can support OEM applications by evaluating the hydraulic operating conditions and component requirements before product selection.

This approach is particularly important for machines where the hydraulic motor or steering control unit is an integral part of the machine's overall performance.

Frequently Asked Questions

What is a hydraulic orbital motor?

A hydraulic orbital motor is a hydraulic motor that converts pressurized hydraulic fluid into rotary motion. It is commonly used in applications requiring high torque at low or medium speeds.

What is a hydraulic steering control unit?

A hydraulic steering control unit, also known as an orbital steering unit or hydraulic steering valve, meters hydraulic oil to the steering cylinder to provide controlled hydraulic steering.

What is the difference between an orbital motor and a hydraulic motor?

An orbital motor is a type of hydraulic motor. Orbital motors are particularly well suited to applications requiring high starting torque, low-speed operation, and compact installation.

Where are orbital motors used?

Orbital motors are used in agricultural machinery, construction equipment, forestry equipment, material handling systems, utility vehicles, conveyors, specialized mobile equipment, and many other hydraulic applications.

How do I select the right hydraulic orbital motor?

The main parameters are required torque, operating speed, hydraulic flow, operating pressure, displacement, duty cycle, shaft configuration, and mounting dimensions.

What displacement ranges are available?

Depending on the model, hydraulic orbital motors can be available in displacement ranges from approximately 10 to 2,000 cm³/rev. The exact range and performance depend on the selected motor.

What pressure can a hydraulic orbital motor handle?

Pressure capacity depends on the specific motor design and operating conditions. Hidroman's listed product range includes options up to 420 bar. Always verify continuous and peak pressure ratings for the specific model before operation.

Can hydraulic orbital motors be used in OEM machines?

Yes. Orbital motors are widely used in OEM mobile machinery and specialized hydraulic equipment. Motor selection should be based on the machine's complete hydraulic and mechanical requirements.

Can Hidroman help select an orbital motor?

Yes. Providing the required flow, operating pressure, RPM, torque, machine type, and mounting requirements allows the appropriate hydraulic orbital motor configuration to be evaluated.

Technical Product Selection

For a hydraulic orbital motor or steering control unit quotation, the following information is recommended:

Machine Type:
Required Torque:
Required RPM:
Hydraulic Flow:
Operating Pressure:
Maximum Pressure:
Motor Displacement:
Shaft Type:
Mounting Configuration:
Hydraulic Port Size:
Duty Cycle:

Providing these specifications helps ensure that the selected hydraulic component is suitable for the intended application.

Hydraulic Orbital Motors and Steering Control Units from Hidroman

Hidroman supplies hydraulic solutions for demanding mobile and industrial applications, with a focus on correct component selection, system compatibility, and long-term hydraulic performance.

Whether you need a hydraulic orbital motor, orbital steering unit, hydraulic steering valve, or an OEM hydraulic solution, the correct product should be selected according to the actual operating requirements of the machine.

Contact Hidroman for hydraulic orbital motor and steering control unit selection, technical information, and OEM applications.