Types   |  Accessories  |  Direct Drive Motors  |  Characteristics

A gearmotor is basically a combination of a gear reducer and an ac or dc electric motor, with the gears and the motors combined into one unit. Most industrial gearmotors use ac motors, typically fixed-speed motors. However, dc motors can also be used as gearmotors, particularly in automotive applications.


Likewise, the gear reducers themselves can be different types such as helical, bevel gears or planetary types. And the physical configuration of gearmotors can differ as well including inline types, right angle, and shafted or hollow-shaft configurations.


In this installment of Motion Control Classroom, you’ll find resources covering the basics of gearmotors and gearmotor accessories, but also how to select the right gearmotor to meet your particular application’s requirements. You’ll also find information on gears and gearboxes, including gearbox service factor and service class.


You can find these and many more resources on motion control components and systems, including other MC Classroom installments, at www.designworldonline.com/mc2/.

Miles Budimir

Senior Editor, Motion Control

Design World Magazine

GEARMOTORS

Gearmotors Classroom Sponsored by

GEARMOTORS

Selection • Summary • Types • Performance

How to Select a Gearmotor in Four Simple Steps

Consider key design parameters when selecting a gearmotor for a motion control application

What is a gearmotor? Technical Summary

A gearmotor is a type of gear reducer based around an ac or dc electrical motor. The gear and the motors are combined into one unit.

What kinds of housings are there for gearmotors?

Aside the quality and type of gears in the gearmotor, housing material also plays a role in determining gearmotor quality and performance.

How does the performance of parallel and right-angle gearmotors compare?

A common way to classify gearmotors is by the output shaft orientation, and two of the standard types are parallel and right-angle arrangements.

Accessories for gearmotors are usually not the first thing most people look to when selecting a motor for an application. That’s because more important parameters like output torque, horsepower, and speed ratings usually (and rightfully so) take precedence.

What are shaft kits, face adapters, and mounting bases for gearmotors?

How to Size and Select a Gearbox: A Motion Engineer’s Guide

Application-tailored and custom gearboxes are increasingly common, mainly because they’re easier than ever to manufacture to specification.


That’s not to say that the design work isn’t challenging. However, modern manufacturing lets some suppliers make gearboxes and components to meet specific application requirements.

How do direct-drive (torque) motors compare to gearmotors?

Comparing gearmotors to direct-drive (torque) motors means comparing a number of metrics including efficiency and cost.


In some regards, the two are fairly comparable. Both gearmotors and direct-drive torque motors eliminate the need for other power transmission components between the motor and load that add compliance. This includes components such as belts and pulleys, chains and sprockets, and external gearing such as gearboxes. 

GEARMOTORS

Characteristics • Efficiency • Stepper Motor • Service

What are characteristics of planetary gearmotors?

Gearmotors can incorporate different gear types. Common types include spur gears, worm gears, helical gears, planetary gears, even harmonic gears. 

What are efficiency requirements for continuous vs. intermittent duty gearmotors?

It’s now mandatory that continuous duty motors for integral gearmotors be Premium Efficient. 

Why use a gearbox with a stepper motor?

Adding a gearbox to a stepper motor system can improve the motor’s performance.

Gearbox service factor and service class explained

Sizing a gearbox (or gearmotor) for an industrial application typically begins with determining the appropriate service factor.

maxon is the worldwide leading provider of high-precision drive systems. For the past 50 years, maxon has focused on customer-specific solutions, quality, and innovation.