How to Select A Gear Motor (Gearmotor)?

A gearmotor is an all-in-one combination of an electric motor and a gearbox. This makes it a simple, cost-effective solution for high-torque, low-speed applications because it combines a motor with a gear reducer system. You can choose or ask our sale engineers. How to select gearmotor? You can learn from our article.

First Step: Analyze Specific Needs

Before you begin selecting a geared motor, you first need to consider and know the application requirements. This is not a comprehensive list but gives a general idea of the common considerations.

Torque and Speed

• Output of the gearing
• Torque Types
• Loading Capacity
• Electrical power (three phase, 50 or 60Hz, Voltage)

Duty

• Applications
• Will it be overload? And can I rate for a reduced duty ?

Control System

• Will I need position, torque or speed control?
• Will the motor be run across the line or with a VFD?
• Will the motor hold the load at 0 speed indefinitely (e.g. hoisting application)?
• Does the motor need a spring-set brake on it?
• Does it need a feedback device like an encoder?

Mounting Style

• Mounting Types: Foot mounted, shaft mounted, or flange mounted?
• Are there space constraints?
• Output axis: inline or at a right angle

Environment

• Working Environment: Wash-down, saltwater, sensitivity to noise, etc
• Working Temperature
• Does it require special ingress protection (washdown, outdoors, etc.)?
• Is it food processing?

Second Step: Choose Gearbox Technology

There are several types of gearmotor. Which do you need to choose? You have to select based on your applications. We provide four types of gear technology.

• R Series Helical Gearbox
• F Series Parallel-shaft Gearbox
• K Series Helical-bevel Gearbox
• S Series Helical Worm Gearbox

Helical-Worm gearmotors and Helical-Bevel gearmotors will provide right angle outputs. Helical-worm can be cost advantageous for larger reduction ratios. Helical-bevel has the advantage of better efficiency, which can possibly equate to a smaller motor.These four types of gearbox are the most widely used in multi-industry.

Third Step: Select Motor

Use your list of application requirements and compare them to the motor specifications of the different types you are interested in such as a universal, brushless DC, AC induction or a permanent magnet gearmotor. Because each application has its own unique characteristics and requirements, it is important to note which factor such as horsepower, starting torque or efficiency is most important to your application. During this phase, you may decide that matching a gearbox and motor separately will best suit your needs.

You will decide the parameter:

• Motor Size
• Using Voltage
• Motor Frequency

Fourth Step: Torque/Speed Selection

You need make a sure.

• Full-load gearbox torque
• Gearbox input speed
• Gearbox yield strength

Fifth Step: SF Selection

SF is short of gearing service factor. In other words, Service Factor provides a relative comparison to how much capacity the gears have in the current configuration. Sometimes, the application is very difficult with regards to Duty, Shock loading, Temperature, etc.

You need choose SF based on detail application.

Sixth Step: Mounting Style Selection

This section allows a user to select how the geared motor will be mounted. Users can select these mounting style:

• a unit with an output shaft
• a shaft mounted unit with a hollow bore.
• Feet mounting
• Flange mounting

For shaft mount applications, a nice option is a shrink disk mounting. Assembly and disassembly are very easy.

Seventh Step: Others Selection

Motor Options

It can include a motor on the brake, encoder types, motor fan, etc.

General Options

It can include a second nameplate, condensation drain hole, etc. The protection degree is also included

If you need any assistant from our engineers, you can contact us directly.