Standard Electric Motor Frame Sizes

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.

Standard electric motor frame sizes.

0 55kw to 400kw at 4 pole speed. 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. Frame size 80 to 355 in foot flange and or foot flange combinations. Typical examples of frame numbers 48 56 145 and 215.

Iec nema standard torques iec and nema torque. 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. For the squirrel cage 3 phase induction motors of 1000v or lower. Most of the dimensions are standard dimensions that are common to all motor manufacturers.

1 3 phase tefc cast iron at 50hz 400v and 525v as standard 2. Electrical motor shaft power electrical motors are rated in horsepower or watt. Nema national electrical manufacturers association frame size refers to mounting only and has no direct bearing on the motor body diameter. Certain nema 56z frame motors have 1 2 x 1 1 2 long shaft with 3 64 flat.

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 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 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. Base of 56hz frame motors has holes and slots to match nema 56 56h 143t and 145t mounting dimensions. 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. One exception to this is the c dimension overall motor length which will change from one manufacturer to another.

In any standard frame number designation there are either two or three numbers. Discontinued nema frame. 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. Premium efficiency ie3 to iec 60034 30 iec 60034 2 1 6.

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. Most of the dimensions are standard dimensions that are common to all motor manufacturers. There are many motors of the same horsepower built in different frames.

One exception to this is the c dimension overall motor length which will.