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.
What size is a 48 frame motor?
NEMA T FRAME DIMENSIONS
|56 56H||3 1/2||11/32 Slot|
|143T 145T||3 1/2||11/32|
|182T 184T||4 1/2||13/32|
What does frame size mean on a motor?
Frame numbers are not intended to indicate electrical characteristics such as horsepower. However, as a frame number becomes higher so in gener- al does the physical size of the motor and the horsepower. … The frame number relates to the “D” dimension (distance from center of shaft to center bottom of mount).
What is pump frame size?
Motor Frame Size
The physical size of the spa pump motor is referred to as frame. Spa main pumps have a size of either 48 frame (approx. 5.5″ diameter), or 56 frame (approx. 6.5″ diameter). … Bolt spacing on a 48 frame motor will be less than 4 inches.
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. Because of the different motor sizes, you will need to adjust the relative heights of pump and motor so that they line up properly if you mix the frames.
How do you determine engine 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 type of shaft does a 56Y frame motor have?
Its large 6.5 frame boasts a stainless steel shaft for extremely durable housing and its thermally protected, Class B insulated design keeps the motor cool to prevent overheating.