Standard Electric Motor Frame Sizes

Cage 3 phase induction motors lower than 1000v and smaller than 315 frame size can safely run continuously at the speed in the table below.

Standard electric motor frame sizes. 1 3 phase tefc cast iron at 50hz 400v and 525v as standard 2. Iec nema standard torques iec and nema torque. Electrical motor shaft power electrical motors are rated in horsepower or watt. Leader in energy efficient industrial electric motors and drives nemakeyseat nemakeyseat shaft dimensionsshaft dimensions u r s u r s 3 8 21 64 flat 1 7 8 1 19 32 1 2 1 2 29 64 flat 2 1 8 1 27 32 1 2.

On page 14 you will find a baldor frame size chart that is a great reference on t frame u frame and original frame motors. Premium efficiency ie3 to iec 60034 30 iec 60034 2 1 6. Many have been in the situation where you needed a specific frame only to realize it was made with a special shaft or has a. Drawings represent standard tefc general purpose motors refer data section 502 for various models open or tefc d im e ns oa rf c ly.

Frame size 2 pole 4 pole 6 pole 100 5200 3600 2400 112 5200 3600 2400 132 4500 2700 2400 160 4500 2700 2400. Standard short shaft for direct drive applications. Motors designated 56h have two sets of 2f mounting holes 3 and 5. Typical examples of frame numbers 48 56 145 and 215.

Electrical motors full load amps full load currents for 460 volts 230 volts and 115 volts motors single and 3 phase. One exception to this is the c dimension overall motor length which will change from one manufacturer to another. There are many motors of the same horsepower built in different frames. Most of the dimensions are standard dimensions that are common to all motor manufacturers.

Standard nema frames vs horsepower hp 900 rpm 1200 rpm 1800 rpm 3600 rpm t frames 1964 present u frame 1952 present original nema 1 1 5 2 3 5 7 5 10 15 20 25 30. Frame size 80 to 355 in foot flange and or foot flange combinations. Base of 56hz frame motors has holes and slots to match nema 56 56h 143t and 145t mounting dimensions. One exception to this is the c dimension overall motor length which will.

Frame size basis on page 14 you will find a baldor frame size chart that is a great reference on t frame u frame and original frame motors. What electric motor frame sizes tell you. Discontinued nema frame. In any standard frame number designation there are either two or three numbers.

06 05 2019 it is standard to see the frame size on every electric motor nameplate but do you understand what that frame means in regard to the mounting of the motor. For the squirrel cage 3 phase induction motors of 1000v or lower. 0 55kw to 400kw at 4 pole speed. Most of the dimensions are standard dimensions that are common to all motor manufacturers.

Nema national electrical manufacturers association frame size refers to mounting only and has no direct bearing on the motor body diameter.