NEMA FRAME DIMENSIONS A.C. Motors
Dimensions in Inches
| Frame | D | E | 2F | H | U | BA | N-W | V min. | R | ES min. | S |
|---|
| 48 | 3 | 2.12 | 2.75 | .34 | .5 | 2.5 | 1.5 | - | .453 | - | Flat |
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| 56 | 3.5 | 2.44 | 3 | .34 | .625 | 2.75 | 1.88 | - | .517 | 1.41 | .188 |
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| 143 | 3.5 | 2.75 | 4 | .34 | .75 | 2.25 | 2 | 1.75 | .643 | 1.41 | .188 |
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| 143T | 3.5 | 2.75 | 4 | .34 | .875 | 2.25 | 2.25 | 2 | .771 | 1.41 | .188 |
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| 145 | 3.5 | 2.75 | 5 | .34 | .75 | 2.25 | 2 | 1.75 | .643 | 1.41 | .188 |
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| 145T | 3.5 | 2.75 | 5 | .34 | .875 | 2.25 | 2.25 | 2 | .771 | 1.41 | .188 |
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| 182 | 4.5 | 3.75 | 4.5 | .41 | .875 | 2.75 | 2.25 | 2 | .771 | 1.41 | .188 |
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| 182T | 4.5 | 3.75 | 4.5 | .41 | 1.125 | 2.75 | 2.75 | 2.5 | .986 | 1.78 | .25 |
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| 184 | 4.5 | 3.75 | 5.5 | .41 | .875 | 2.75 | 2.25 | 2 | .771 | 1.41 | .188 |
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| 184T | 4.5 | 3.75 | 5.5 | .41 | 1.125 | 2.75 | 2.75 | 2.5 | .986 | 1.78 | .25 |
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| 203 | 5 | 4 | 5.5 | .41 | .75 | 3.12 | 2.25 | 2 | .643 | 1.53 | .188 |
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| 204 | 5 | 4 | 6.5 | .41 | .75 | 3.12 | 2.25 | 2 | .643 | 1.53 | .188 |
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| 213 | 5.25 | 4.25 | 5.5 | .41 | 1.125 | 3.5 | 3 | 2.75 | .986 | 2.03 | .25 |
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| 213T | 5.25 | 4.25 | 5.5 | .41 | 1.375 | 3.5 | 3.38 | 3.12 | 1.201 | 2.41 | .312 |
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| 215 | 5.25 | 4.25 | 7 | .41 | 1.125 | 3.5 | 3 | 2.75 | .986 | 2.03 | .25 |
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| 215T | 5.25 | 4.25 | 7 | .41 | 1.375 | 3.5 | 3.38 | 3.12 | 1.201 | 2.41 | .312 |
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| 224 | 5.5 | 4.5 | 6.75 | .41 | 1 | 3.5 | 3 | 2.75 | .857 | 2.03 | .25 |
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| 225 | 5.5 | 4.5 | 7.5 | .41 | 1 | 3.5 | 3 | 2.75 | .857 | 2.03 | .25 |
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| 254 | 6.25 | 5 | 8.25 | .53 | 1.125 | 4.25 | 3.37 | 3.12 | .986 | 2.03 | .25 |
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| 254U | 6.25 | 5 | 8.25 | .53 | 1.375 | 4.25 | 3.75 | 3.5 | 1.201 | 2.78 | .312 |
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| 254T | 6.25 | 5 | 8.25 | .53 | 1.625 | 4.25 | 4 | 3.75 | 1.416 | 2.91 | .375 |
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| 256U | 6.25 | 5 | 10 | .53 | 1.375 | 4.25 | 3.75 | 3.5 | 1.201 | 2.78 | .312 |
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| 256T | 6.25 | 5 | 10 | .53 | 1.625 | 4.25 | 4 | 3.75 | 1.416 | 2.91 | .375 |
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| 284 | 7 | 5.5 | 9.5 | .53 | 1.25 | 4.75 | 3.75 | 3.5 | .986 | 2.03 | .25 |
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| 284U | 7 | 5.5 | 9.5 | .53 | 1.625 | 4.75 | 4.88 | 4.62 | 1.416 | 3.78 | .375 |
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| 284T | 7 | 5.5 | 9.5 | .53 | 1.875 | 4.75 | 4.62 | 4.38 | 1.591 | 3.28 | .5 |
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| 284TS | 7 | 5.5 | 9.5 | .53 | 1.625 | 4.75 | 3.25 | 3 | 1.416 | 1.91 | .375 |
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| 286U | 7 | 5.5 | 11 | .53 | 1.625 | 4.75 | 4.88 | 4.62 | 1.416 | 3.78 | .375 |
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| 286T | 7 | 5.5 | 11 | .53 | 1.875 | 4.75 | 4.62 | 4.38 | 1.591 | 3.28 | .5 |
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| 286TS | 7 | 5.5 | 11 | .53 | 1.625 | 4.75 | 3.25 | 3 | 1.416 | 1.91 | 3.75 |
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| 324 | 8 | 6.25 | 10.5 | .66 | 1.625 | 5.25 | 4.87 | 4.62 | 1.416 | 3.78 | .375 |
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| 324U | 8 | 6.25 | 10.5 | .66 | 1.875 | 5.25 | 5.62 | 5.38 | 1.591 | 4.28 | .5 |
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| 324S | 8 | 6.25 | 10.5 | .66 | 1.625 | 5.25 | 3.25 | 3 | 1.416 | 1.91 | .375 |
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| 324T | 8 | 6.25 | 10.5 | .66 | 2.125 | 5.25 | 5.25 | 5 | 1.845 | 3.91 | .5 |
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| 324TS | 8 | 6.25 | 10.5 | .66 | 1.875 | 5.25 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 326 | 8 | 6.25 | 12 | .66 | 1.625 | 5.25 | 4.87 | 4.62 | 1.416 | 3.78 | .375 |
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| 326U | 8 | 6.25 | 12 | .66 | 1.875 | 5.25 | 5.62 | 5.38 | 1.591 | 4.28 | .5 |
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| 326S | 8 | 6.25 | 12 | .66 | 1.625 | 5.25 | 3.25 | 3 | 1.416 | 1.91 | .375 |
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| 326T | 8 | 6.25 | 12 | .66 | 2.125 | 5.25 | 5.25 | 5 | 1.845 | 3.91 | .5 |
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| 326TS | 8 | 6.25 | 12 | .66 | 1.875 | 5.25 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 364 | 9 | 7 | 11.25 | .66 | 1.875 | 5.88 | 5.62 | 5.38 | 1.591 | 4.28 | .5 |
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| 364S | 9 | 7 | 11.25 | .66 | 1.625 | 5.88 | 3.25 | 3 | 1.416 | 1.91 | .375 |
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| 364U | 9 | 7 | 11.25 | .66 | 2.125 | 5.88 | 6.37 | 6.12 | 1.845 | 5.03 | .5 |
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| 364US | 9 | 7 | 11.25 | .66 | 1.875 | 5.88 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 364T | 9 | 7 | 11.25 | .66 | 2.375 | 5.88 | 5.88 | 5.62 | 2.01 | 4.28 | .625 |
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| 364TS | 9 | 7 | 11.25 | .66 | 1.875 | 5.88 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 365 | 9 | 7 | 12.25 | .66 | 1.875 | 5.88 | 5.62 | 5.38 | 1.591 | 4.28 | .5 |
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| 365S | 9 | 7 | 12.25 | .66 | 1.625 | 5.88 | 3.25 | 3 | 1.416 | 1.91 | .375 |
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| 365U | 9 | 7 | 12.25 | .66 | 2.125 | 5.88 | 6.37 | 6.12 | 1.845 | 5.03 | .5 |
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| 365US | 9 | 7 | 12.25 | .66 | 1.875 | 5.88 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 365T | 9 | 7 | 12.25 | .66 | 2.375 | 5.88 | 5.88 | 5.62 | 2.021 | 4.28 | .625 |
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| 365TS | 9 | 7 | 12.25 | .66 | 1.875 | 5.88 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 404 | 10 | 8 | 12.25 | .81 | 2.125 | 6.62 | 6.37 | 6.12 | 1.845 | 5.03 | .5 |
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| 404S | 10 | 8 | 12.25 | .81 | 1.875 | 6.62 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 404U | 10 | 8 | 12.25 | .81 | 2.375 | 6.62 | 7.12 | 6.88 | 2.021 | 5.53 | .625 |
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| 404US | 10 | 8 | 12.25 | .81 | 2.125 | 6.62 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 404T | 10 | 8 | 12.25 | .81 | 2.875 | 6.62 | 7.25 | 7 | 2.45 | 5.65 | .75 |
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| 404TS | 10 | 8 | 12.25 | .81 | 2.125 | 6.62 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 405 | 10 | 8 | 13.75 | .81 | 2.125 | 6.62 | 6.37 | 6.12 | 1.845 | 5.03 | .5 |
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| 405S | 10 | 8 | 13.75 | .81 | 1.875 | 6.62 | 3.75 | 3.5 | 1.591 | 2.03 | .5 |
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| 405U | 10 | 8 | 13.75 | .81 | 2.375 | 6.62 | 7.12 | 6.88 | 2.021 | 5.53 | .625 |
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| 405US | 10 | 8 | 13.75 | .81 | 2.125 | 6.62 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 405T | 10 | 8 | 13.75 | .81 | 2.875 | 6.62 | 7.25 | 7 | 2.45 | 5.65 | .75 |
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| 405TS | 10 | 8 | 13.75 | .81 | 2.125 | 6.62 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 444 | 11 | 9 | 14.5 | .81 | 2.375 | 7.5 | 7.12 | 6.88 | 2.021 | 5.53 | .625 |
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| 444S | 11 | 9 | 14.5 | .81 | 2.125 | 7.5 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 444U | 11 | 9 | 14.5 | .81 | 2.875 | 7.5 | 8.62 | 8.38 | 2.45 | 7.03 | .75 |
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| 444US | 11 | 9 | 14.5 | .81 | 2.125 | 7.5 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 444T | 11 | 9 | 14.5 | .81 | 3.375 | 7.5 | 8.5 | 8.25 | 2.88 | 6.91 | .875 |
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| 444TS | 11 | 9 | 14.5 | .81 | 2.375 | 7.5 | 4.75 | 4.5 | 2.021 | 3.03 | .625 |
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| 445 | 11 | 9 | 16.5 | .81 | 2.375 | 7.5 | 7.12 | 6.88 | 2.021 | 5.53 | .625 |
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| 445S | 11 | 9 | 16.5 | .81 | 2.125 | 7.5 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 445U | 11 | 9 | 16.5 | .81 | 2.875 | 7.5 | 8.62 | 8.38 | 2.45 | 7.03 | .75 |
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| 445US | 11 | 9 | 16.5 | .81 | 2.125 | 7.5 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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| 445T | 11 | 9 | 16.5 | .81 | 3.375 | 7.5 | 8.5 | 8.25 | 2.88 | 6.91 | .875 |
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| 445TS | 11 | 9 | 16.5 | .81 | 2.375 | 7.5 | 4.75 | 4.5 | 2.021 | 3.03 | .625 |
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| 447TS | 11 | 9 | 20 | MF | MF | MF | MF | MF | MF | MF | MF |
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| 449TS | 11 | 9 | 25 | MF | MF | MF | MF | MF | MF | MF | MF |
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| 504U | 12.5 | 10 | 16 | .94 | 2.875 | 8.5 | 8.62 | 8.38 | 2.45 | 7.28 | .75 |
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| 505 | 12.5 | 10 | 18 | .94 | 2.875 | 8.5 | 8.62 | 8.38 | 2.45 | 7.28 | .75 |
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| 505S | 12.5 | 10 | 18 | .94 | 2.125 | 8.5 | 4.25 | 4 | 1.845 | 2.78 | .5 |
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MF = Dimensions vary by manufacturer
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