How much horsepower do I need?

The horsepower you need is determined by a number of factors, including:

  • Viscosity 
  • Specific gravity 
  • Volume of the product you’re mixing
  • Intensity and type of mixing you are performing
  • The type of impeller you’re using will also have an impact 

NOTE: See our helpful chart and calculations to help you get started. 

What power source should I be working with?

In many cases, the type of motor used with industrial mixers is determined by the available power source. Compressed air for pneumatic motors, electricity, and hydraulic power can all be used effectively, and each have various features and benefits. 

Do you have special requirements?

 It’s not uncommon to have unique application considerations come into play – such as needing an explosion-proof motor, operating in a sanitary or washdown environment, or requiring a special mount to name a few. Whatever the factors that help you determine the motor, it's very important to also consider whether it’s necessary or beneficial to use a gear reducer to achieve the desired power output (torque) and speed for a mixer.

What is a gear reducer and do I need one?

A gear reducer (also known by many other names, such as gearbox, speed reducer, ratio multiplier, etc.) is a device with an input and output connection that takes the input speed and torque from a motor, and through a set of gears, both increases the torque and slows the speed of the output connection. Gear reducers are usually described by their gear ratio (3:1. 5:1, 7:1, etc.) and configuration (in-line, right angle).


For instance, an 1800 RPM electric motor utilizing a 3:1 gearbox will have an output of 600 RPM and a proportionately greater torque. 

Without gear reducers, higher viscosity mixtures would require excessively large motors. If an underpowered electric motor were to be used, you would experience severe damage to the motor.  Attempting to use an underpowered pneumatic motor would create a "blow-by" condition, rendering it unable to turn.

For all these reasons, gear reducers allow for smaller, lighter and more efficient, and effective systems. That’s why gear reducers are recommended in high viscosity material or in applications where constant agitation at a low speed (and sufficient power) is required. Gear reducers are also practical for a mixture that requires a high starting torque but becomes less viscous when mixed.

Ask us. We’re here to help.

For detailed recommendations on your mixing or dispersing applications, call Fawcett Customer Service at 855-MIX-FLOW or send us an email.

For over half a century, Fawcett Mixing Equipment Specialists have looked at new ways to improve quality, maximize efficiency, and minimize safety concerns to find solutions for a variety of mixing applications. Let the mixing equipment specialists at Fawcett help you find the precise solution that works for your mixture requirements.