Built for a Wet, Corrosive Environment

Cooling towers run in near constant humidity, drift, and exposure to treated water, conditions that wear down a standard motor fast. That's why these units use cast iron frames and enclosures rated to handle it.

Look for TEAO (totally enclosed, air over) construction, which relies on airflow from the fan itself to keep the motor cool while staying sealed against moisture.

Speed Options for Fan Load

Cooling tower fans often run slower than a typical motor, and our lineup covers 600, 900, 1200, and 1800 RPM to match different fan diameters and airflow needs. Lower speeds usually pair with larger fan blades on bigger towers.

If you're driving the fan through a belt instead of a direct shaft connection, check out our pulleys and sheaves and belts to complete that setup.

Running on a VFD? Look for the Shaft Grounding Ring

Many cooling tower motors are paired with a VFD to control fan speed and save energy, but that setup can send stray electrical current through the motor bearings over time. A shaft grounding ring gives that current a path to ground instead, and several motors in this collection include one built in.

If yours doesn't, it's worth adding one rather than risking early bearing failure down the road.

Horsepower and Frame Sizes

This collection runs from 1/2HP up to 100HP, in three phase power only, since cooling tower fans are virtually always run on 3-phase equipment. Frame sizes span from small 143T motors up to large 445T units, so filtering by horsepower and frame is the quickest way to match what's already mounted on your tower.

Matching an OEM Cooling Tower Motor

If you're replacing a motor from a specific tower manufacturer, the nameplate horsepower, RPM, and frame size are usually enough for our team to find a direct match or a compatible substitute. Send us those details and we'll help confirm fit before you order.

For a full look at either manufacturer's broader lineup beyond cooling tower duty, see our Techtop and WEG motor pages.

Explore More

Our Electric Motors collection covers every application we carry, and Electric Motor Parts has replacement bearings, fan covers, and shaft seals if only a component has failed.

When a motor needs service rather than replacement, our electric motor repair page covers what we handle in house.