Standard Electric Motor Frame Sizes

Motors designated 56h have two sets of 2f mounting holes 3 and 5.

Standard electric motor frame sizes.

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. Electrical motor shaft power electrical motors are rated in horsepower or watt. 1 3 phase tefc cast iron at 50hz 400v and 525v as standard 2. Iec nema standard torques iec and nema torque.

Most of the dimensions are standard dimensions that are common to all motor manufacturers. 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.

One exception to this is the c dimension overall motor length which will. Frame size 2 pole 4 pole 6 pole 100 5200 3600 2400 112 5200 3600 2400 132 4500 2700 2400 160 4500 2700 2400. 2 4 6 8 pole motors available ex stock as standard. Certain nema 56z frame motors have 1 2 x 1 1 2 long shaft with 3 64 flat.

Frame size 80 to 355 in foot flange and or foot flange combinations. Typical examples of frame numbers 48 56 145 and 215. In any standard frame number designation there are either two or three numbers. One exception to this is the c dimension overall motor length which will change from one manufacturer to another.

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. There are many motors of the same horsepower built in different frames. Standard short shaft for direct drive applications. 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.

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. 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. 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. Discontinued nema frame.

Electrical motors full load amps full load currents for 460 volts 230 volts and 115 volts motors single and 3 phase. Nema national electrical manufacturers association frame size refers to mounting only and has no direct bearing on the motor body diameter. Premium efficiency ie3 to iec 60034 30 iec 60034 2 1 6. 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.

Electrical motor efficiency ratings nema electrical motor efficiency ratings.