Irrigation Gearbox Selection Guide

Irrigation Gearbox Selection Guide Why Proper Gearbox Selection Matters in Irrigation Systems In agricultural irrigation systems, gearboxes are typically required to operate at low speed, high torque,

Irrigation Gearbox Selection Guide

Why Proper Gearbox Selection Matters in Irrigation Systems

In agricultural irrigation systems, gearboxes are typically required to operate at low speed, high torque, and for long continuous periods. An incorrect gearbox selection may lead to insufficient torque, unstable operation, excessive wear, or even system failure. Therefore, proper selection is essential to ensure reliability, efficiency, and long service life of the entire irrigation system.

This guide is designed to help customers from different markets and application backgrounds quickly and accurately select the right irrigation gearbox.

1. Identify the Irrigation System Type

Different irrigation systems place different demands on the gearbox. The first step in selection is to clearly define the application:

Center Pivot Irrigation Systems Long operating hours and continuous movement require high reliability and durability.

Linear / Lateral Move Irrigation Systems Variable loads and ground conditions demand higher output torque and strong shock resistance.

Hose Reel / Drum Irrigation Machines Precise speed control and suitable reduction ratios are critical.

Sprinkler or Micro-Irrigation Drive Units Compact design and flexible installation are often key requirements.

Understanding the application helps determine the most suitable gearbox structure.

2. Define Key Technical Parameters

Accurate technical data is the foundation of correct gearbox selection. The following parameters should be clarified in advance:

Required Output Torque (Nm) Calculated based on machine weight, wheel diameter, terrain conditions (soil, sand, slope), and operating resistance, with an appropriate safety factor.

Output Speed (rpm) Determined by the desired travel speed or rotation speed of the irrigation system.

Reduction Ratio Defined by motor speed and required output speed; this is one of the most critical selection parameters.

Duty Cycle and Operating Time Most irrigation systems operate under continuous duty (S1), which requires robust gear design and reliable lubrication.

3. Choose the Appropriate Gearbox Type

Based on torque requirements, installation space, and cost considerations, the following gearbox types are commonly used in irrigation applications:

W7824

W7786

W7826

W7967

W7939

W7939T

W725U

W8760

W740U

W740UV

TNT-2-U

TNT-2-UV

We will match the gearbox you need based on the brand.

4. Motor Matching and Power Supply

Irrigation gearboxes can be matched with different motor types depending on regional and system requirements:

Single-phase or three-phase induction motors

Variable frequency drive (VFD) motors for speed control and energy saving

When selecting the gearbox, please confirm:

Motor voltage and frequency (e.g. 220V / 380V, 50Hz / 60Hz)

Motor power in relation to required torque

Compatibility with frequency inverters for long-term operation

Proper motor matching improves system efficiency and reduces overall energy consumption.

5. Mounting and Output Configuration

To ensure easy integration with irrigation equipment, multiple installation and output options are available:

Mounting types: flange-mounted, foot-mounted, or shaft-mounted

Output options: solid shaft, hollow shaft (keyed or shrink disc), flange output

Selecting the correct mounting and output configuration simplifies installation and enhances operational reliability.

6. Environmental and Protection Considerations

Irrigation gearboxes usually operate outdoors under challenging conditions. Selection should take into account:

Protection level against water and dust

Sealing design and lubrication method

Corrosion resistance for high-humidity or saline environments

A gearbox properly selected for the operating environment will deliver a significantly longer service life.

Professional Selection Support

With extensive experience in agricultural drive solutions, we provide professional gearbox selection support based on your specific application data, including load, speed, motor power, installation method, and environmental conditions.

Please feel free to contact us for tailored irrigation gearbox selection and technical assistance.

Irrigation Gearbox Selection Guide