CHOOSING THE RIGHT REPLACEMENT MOTOR IS EASY USING THESE 5 STEPS: 

1. Know which end frame you need. Is it: 

2. Know the total horsepower output. Find it on the motor's nameplate. Use this equation: The total horsepower times (x) the service factor of the replacement motor must be equal to or greater than that of the original motor being replaced. 

3. Is the original motor single or three phase? The original and replacement motors must be the same unless the power supply is being changed. 

4. What is the correct voltage? The operating voltage of the replacement motor must match the voltage of the original motor. A single voltage motor is an acceptable replacement for a dual voltage motor and vice versa. 

5. What is the motor's cycle or hertz? As a general rule, 50-cycle motors should not be substituted for 60-cycle motors and vice versa. Thru Bolt 56C (C Face Keyed) 56J (C Face Threaded) Square Flange.

Source: A.O. Smith Inc.