What are electric 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.
What size is a 56 frame motor?
| NEMA FRAME | D* | H(dia.) |
|---|---|---|
| 56 | 3 1/2 | 11/32 slot |
| 56H | 3 1/2 | 11/32 slot |
| 56HZ | 3 1/2 | ** |
| 66 | 4 1/8 | 13/32 slot |
What is difference between 48 and 56 frame motor?
The main difference between a 48 frame and a 56 frame hot tub pump is that the 48 frame has a smaller motor housing and so the 4 through bolts that fasten the wet end to the motor are closer together on the smaller motor.
How do I read my electric motor specs?
The RPM listed on the nameplate is the shaft speed for the motor. The speed of the motor is directly related to the frequency of the line voltage and the number of poles in the motor. At 60 Hz, a 4 pole motor will rotate at approximately 1800 RPM (7200/4 poles).
What do electric motor frame numbers mean?
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.
What do motor frame numbers mean?
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”.
How do you measure a motor frame size?
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.
What are the dimensions of the frame of an electrical motor?
Electrical Motors – Frame Dimensions Dimensions of electrical motor frames according NEMA 1984 are indicated below: 1 in (inch) = 25.4 mm 1 inch = 25.4 mm
What are the “BA” dimensions of a NEMA motor?
– When a “C” flange has been added to a NEMA motor the “BA” dimensions are: Frame: “BA”: 143-5TC 2-3/4 182-4TC 3-1/2 213-5TC 4-1/4 254-6TC 4-3/4 – Dimensions: C, N, O, P, & AB are specific to each manufacturer.
What are the different types of electric motors?
Electric Motors – IEC and NEMA Standard Torques – IEC and NEMA torque classifications of electrical motors. Electrical Induction Motors – Synchronous Speed – Operating speed of an induction motor depends on the input power frequency and the number of magnetic poles in the motor.