What is the frame size of an electric motor?

What is frame size in induction motor?

In fractional horsepower motors the frame sizes are two digits and represent the shaft height of the motor from the bottom of the base in sixteenths of an inch. For example, a 56-frame motor would have a shaft height (“D” dimension) of 56/16 of an inch, or 3.5 inches.

How do you read motor frame size?

The frame number relates to the “D” dimension (distance from center of shaft to center bottom of mount). For example, in the two-digit 56 frame, the “D” dimension is 3½”, 56 divided by 16 = 3½”.

What size is a 48 frame motor?


Nema Series D H
48 3 11/32 Slot
56 56H 3 1/2 11/32 Slot
143T 145T 3 1/2 11/32
182T 184T 4 1/2 13/32

What is frame in motor?

The two-digit frame number relates to the shaft height in sixteenths of an inch. You can figure that a 48-frame motor will have a shaft height of 48 divided by 16, or 3 in. Similarly, a 56-frame motor has a shaft height of 3.5 in.

How do you size a motor?

The quickest method to closely estimate motor horsepower is to use a digital clamp meter to measure current and voltage to the motor, and then perform a simple calculation. Use this formula to estimate motor horsepower. Horsepower(hp)= Voltage x Amperage x % EFF x power factor x 1.73/746.

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What is meant by frame size?

Frame size generally refers to frame height, the length of the seat tube from the bottom bracket (crank bearing) to the top tube.

What is the difference between a 48 and a 48Y frame motor?

The only difference between the 56Y and 48Y frame is the circumference of the motor. They will both mount to the seal plate of the pump.

What is pump frame size?

Hot tub pumps typically come in two different frame sizes: 48 frame and 56 frame. When replacing a hot tub pump, it is important to replace it with the same size pump so that the holes and plumbing will line up.

What is a 184 frame motor?

A motor’s frame size is a reference to the size of the mounting footprint, shaft diameter, and shaft length. These motors are all frame size 184. In terms of mounting, these motors can replace each other and other motors with the same frame size.