# What are motor frame sizes?

## What are motor frame sizes?

The frame sizes that are normally associated with industrial fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole pattern.

## How do you measure an electric motor frame?

Just divide the first two digits by four. Thus, a 405 frame (original, U frame, or T frame) has a shaft height of 40 divided by 4, or 10 in. Although no direct inch measurement relates to it, the third digit of three-digit frame sizes is an indication of the motor body’s length.

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 does the T mean in a motor frame size?

The letter T in a frame size tells you frame number that has been standardized by NEMA so that horsepower, speed, and certain dimensions will be the same for all motors with that frame size. These dimensions include the shaft diameter, shaft height, shaft length, mounting-base dimensions and bolt-hole sizes.

### What is 56Z frame?

(Square with Threaded Shaft) – Y-frame motors feature a square metal flange for bolting to the pump housing. The frame you have is a 56Z. Z (Round Flange with Flat Shaft) – The Z-frame uses a flatted shaft end on which the impeller is to be secured.

### What size is a 48 frame motor?

Electrical motors NEMA frame dimensions.

NEMA Frame Designation Frame Dimensions (inches)
D E
42 2 5/8 1 3/4
42C 2 5/8 1 3/4
48 3 2 1/8

What is 48Y frame on motor?

Flex-frame motors
The Flex-frame motors are usually labeled as 48Y, but will have the distinct pedestal at its base. The Flex is unique because it uses four thin partially threaded screws (known as thru bolts) that are slid the length of the motor through the back end and screwed into the seal plate.

What does FR mean on a motor?

October 19, 2015 Matthew Simmons. Your pump motor’s frame (FR) rating notes three key parts of your motor’s design which will help you match your current motor to a replacement. The three key parts are: Barrel Size.

#### What does C face motor mean?

A “C-Face” motor is a common American mechanical standard designed with a rugged flange on the face of the motor for mounting purposes. The weight of the. motor is supported by the flange, which is most commonly attached to a gearbox. The flange is strong enough to cantilever the motor.

#### Can I replace a 48 frame spa pump with a 56 frame?

Almost all spa pumps are manufactured in one of two standard frame sizes: 48-Frame and 56-Frame. If you want to replace your wet end or your motor, you should use an equivalent of the same size, so that the mounting holes between the motor and the wet end align.

What is the difference between 48Y and 56Y frame?

The only difference between the 56Y and 48Y is the circumfrence (width) of the motor. They will both mount to the seal plate but the 48Y will need an optional spacer (that comes with the motor) to sit on to make up for the difference in size.

What does code K mean on a motor?

NEMA locked rotor indicating code letters for electrical motors. Standard 3 phase motors often have these locked rotor codes: less than 1 hp: Locked Rotor Code L, 9.0 – 9.99 kVA. 1 1/2 to 2 hp: Locked Rotor Code L or M, 9.0 – 11.19 kVA. 3 hp : Locked Rotor Code K, 8.0 – 8.99 kVA.

## What are the dimensions of a 56 frame motor?

example, in the two-digit 56 frame, the “D” dimension is 3½”, 56 divided by 16 = 3½”. For the “D” dimension of a three-digit frame number, consider only the first two digits and use the divisor 4. In frame number 145, for example, the first two digits divided by the constant 4 is equal to the “D” dimension, 14 divided by 4 = 3½”. Similarly, the “D” dimension of a 213 frame motor is 5¼”, 21 divided by 4 = 5¼”.

## What is a frame 56 motor?

The frame sizes that are normally associated with industrial fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole pattern. In these motors specific frame assignments have not been made

What is motor frame size?

frame sizes having two-digit designations as opposed to the three-digit designations that are found in Tables 1 and 2. The frame sizes that are normally associated with industrial fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole

What is an electric motor frame?

purpose motors. The frame number specifies dimensions of a general purpose motor frame. Figure 2 is a view of the underside of an electric motor. The letters are NEMA standard letters and the actual dimensions for general purpose motors are shown in Table 1. The diameter of the bolt hole of the motor mounting bracket is letter H. The diameter is 1/32 of an in. larger than the