Electric Motor Weight By Frame Size

Frame size reference tables.

Electric motor weight by frame size.

One of the most obvious has been the ability to pack more horsepower in a smaller physical size. 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. The mystery of motor frame size introduction industrial electric motors have been available for nearly a century. 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.

For the squirrel cage 3 phase induction motors of 1000v or lower. The following are dimensional size charts for standard electric motor nema standard frames and configuration. Use the standard main terminal box table below to determine the standard main box size required by your basic rating information and select the dimension print under the appropriate heading rotatable means terminal box is mounted on the motor and can be rotated in 90 degree. Leader in energy efficient industrial electric motors and drives key and keyseat dimensions framed g f gd frame d g f gd 63 8 51144 1804842 5 149 71 14 115 5 20055 491610 80 15 51966 2256053 18 11 90 20248 7 2506567 5 2012 10028 248 7 28075 712214 11228 248 7 31580 762214.

Frame 42 48 56 56h 143t 145t 182 184 182t 184t 213 215 213t 215t 254u 256u 254t 256t 284u 286u 284t 286t 284ts 286ts 324u 326u 324t 326t 324ts 326ts 364u 365u 364t 365t 364ts 365ts 404u 405u 404t 405t 404ts 405ts 444u 445u 444t 445t 447t 449t 444ts 445ts 447ts 449ts d e 2f h n o p u v aa ab ah aj ak ba bb bd tap 2 5 8 3 3 1 2 3 1 2 4 1 2 5 1 4 6 1 4 7 8 9 10 11 1 3 4 2 1 8 2 7 16 2 3 4 3 3 4 4 1 4 5 5 1 2 6 1 4 7 8 9. Frame size 2 pole 4 pole 6 pole 100 5200 3600 2400 112 5200 3600 2400 132 4500 2700 2400 160 4500 2700 2400. In that time there have been a great many changes. The motor drawings reflect various terminal box sizes available for motors up to 7000hp and voltages up to 13800v.

Standardized motor dimensions are established by the national electrical manufacturers association nema are tabulated below and apply to all base mounted motors listed herein that carry a nema frame designation. 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. The original frame size motors pre 1952 that will reach the end of their useful life and will have to be replaced. 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 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 mounting flange but no one knew how to find this information.