Electric Motor Frame Size Calculator

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Electric motor frame size calculator.

Similarly a 56 frame motor would have a shaft height of 3 1 2 inches. You can figure that a 48 frame motor will have a shaft height of 48 divided by 16 or 3 inches. Discontinued nema frame. In addition to the information below for properly sizing a motor oriental motor offers online motor sizing tools as well as assistance from our technical support staff.

This calculator will also give you motor amps and recommended breaker size starter size heater size and conduit size. Use peak load to calculate the motor size because the motor must be able to drive through the peak demands without overheating. By nema definition two digit frame numbers are fractional frames even though 1 hp or larger motors may be built in them. Base of 56hz frame motors has holes and slots to match nema 56 56h 143t and 145t mounting dimensions.

Enter the motor horsepower and voltage. Rla running load amps current drawn during normal operation of electric motor. 1 in inch 25 4 mm 1 inch 25 4 mm sorry to see that you are blocking ads on the engineering toolbox. Dimensions of electrical motor frames according nema 1984 are indicated below.

Standard short shaft for direct drive applications. The largest of the current fractional horsepower frame sizes is a 56 frame which is available in horsepowers greater than those normally associated with fractionals. Fla full load amps amount of current drawn when full load torque and horsepower is reached for the motor fla is usually determined in laboratory tests note. The largest of the current fractional horsepower frame sizes is a 56 frame which is available in horsepowers greater than those normally associated with fractionals.

Motors designated 56h have two sets of 2f mounting holes 3 and 5. Proper sizing and selection of a motor for your equipment is key to ensuring performance reliability and cost of the equipment. Certain nema 56z frame motors have 1 2 x 1 1 2 long shaft with 3 64 flat. You can figure that a 48 frame motor will have a shaft height of 48 divided by 16 or 3 inches.

1 1 2 3 5 7 10 15 20 25 30 40 50 60 75 100 125 150. Each frame size is designated with a frame number and we have compiled all the dimensions for each frame size into easy to read drawings. Dimension of a 213 frame motor is 5 21 divided by 4 5. In the calculator above fla is rla 25.

National electrical manufacturers association 703 841 3200.