Servo Gearboxes

A gearbox is a mechanical device that uses a system of gears of different sizes and tooth counts to decrease the output speed of a motor while increasing the torque.

Servo Gearbox Types

GAM has one of the broadest offerings of precision servo gearboxes on the market, with the engineering expertise and manufacturing flexibility to provide custom solutions, providing the best solution for your motion control applications.

Servo Gearboxes differ by the type of gearing used. The gearing affects the precision (measured by backlash), available ratios, and configuration of input to output shaft.

GAM Inline Servo Gearboxes

The input shaft and output shaft are inline. This is achieved by using planetary gearing. The gearing can be straight spur planetary (EPL, PE) or helical planetary (SPH). Helical planetary gearboxes offer quieter operation and higher precision. Inline planetary gearboxes are available in ratios up to 1000:1.

Right Angle Servo Gearboxes

In these gearboxes, the input and output shafts are perpendicular. GAM uses 2 types:

Hypoid gearing: Precise and efficient gearing used in the Dyna Series and Dyna Lite gearboxes. Up to 15:1 in a single stage. Higher ratios achieved by adding a planetary gearbox at the input.
Right angle planetary: 1:1 right angle bevel gearing into planetary gearing used in the EPR and PER.

GAM Product Range Brochure pdf

White Paper: Gearbox Accuracy pdf

Motion Design Guide: Gearboxes - from Motion Control Tips pdf

Quick Delivery

GAM has reduced lead times for most of our custom servo gearboxes.

Need a gearbox faster? In a breakdown situation? Use our Express Delivery if you need a gearbox even quicker.

request a quote today

SPH Inline Helical

Helical planetary gearing provides the highest precision for demanding applications

Learn More

Dyna Series Right Angle Hypoid

The Dyna Series is our highest precision right-angle gear reducer using sophisticated hypoid gearing.

Learn More

EPL Inline Planetary

Highly configurable and customizable inline with shaft, flange or hollow outputs

Learn More

EPR Right Angle Planetary

All the advantages of the EPL inline planetary in a right angle configuration

Learn More

SSP Stainless Steel Inline Planetary

Stainless steel inline for food, medical, or sanitary applications

Learn More

Dyna-Lite Right Angle Hypoid

Right angle gearbox with the performance and price point of a precision inline gearbox

Learn More

PE Inline Planetary

The GAM PE series is a great inline planetary gearbox, ideal for most servo and stepper applications.

Learn More

PER Right Angle Bevel Planetary

The PER Series Right Angle Planetary Gearbox provides all the advantages of the popular PE inline gearbox in a right angle…

Learn More

Other GAM gearbox technologies include:

Zero-backlash planetary, cycloidal, and strain wave. These are used for very high precision applications such as robotics.
Spiral Bevel gearboxes, with ratios up to 6;1, used for precision and servo applications.

Gearbox Features

Because of the different types of gearing and configurations, there is a servo gearbox to fit motion applications. Common features include:

Shaft, flange, or hollow outputs.
Included motor adapter customized for your preferred servo motor.
Backlash less than 8 arcmin, and as little as 1 arcmin.

What is a servo gearbox?

A servo gearbox is a high precision gearbox typically used between the servo motor and the driven mechanism in a motion control application. It serves two purposes:

Allows the motor to run in the optimal speed and torque range while producing the desired speed at the driven mechanism.
Reduces the inertia mismatch between the driven mechanism and the servo motor by the square of the ratio. For example, if the mismatch of the inertia is 100:1, a gearbox with a 10:1 ratio reduces this to 1:1 (mismatch divided by ratio squared)

What is a speed reducer gearbox?

A gearbox is a mechanical device that uses a system of gears of different sizes and tooth counts to decrease the output speed of a motor while increasing the torque. The arrangement of the gears generally results in the speed at the output of the gearbox being less than the input of the gearbox (motor speed), though there are gearboxes designed specifically to increase speed. Using a speed reducer gearbox allows a smaller motor to be used while still providing the desired torque for the driven system.