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NEMA Motor Frame Size Chart




NEMA motor Frame size

Frame D E 2F H U BA N-W V min. R ES min. S
48 3 2.12 2.75 0.3 0.5 2.5 1.5 - 0.453 - Flat
56 3.5 2.44 3 0.3 0.63 2.8 1.88 - 0.517 1.41 0.19
143 3.5 2.75 4 0.3 0.75 2.3 2 1.75 0.643 1.41 0.19
143T 3.5 2.75 4 0.3 0.88 2.3 2.25 2 0.771 1.41 0.19
145 3.5 2.75 5 0.3 0.75 2.3 2 1.75 0.643 1.41 0.19
145T 3.5 2.75 5 0.3 0.88 2.3 2.25 2 0.771 1.41 0.19
182 4.5 3.75 4.5 0.4 0.88 2.8 2.25 2 0.771 1.41 0.19
182T 4.5 3.75 4.5 0.4 1.13 2.8 2.75 2.5 0.986 1.78 0.25
184 4.5 3.75 5.5 0.4 0.88 2.8 2.25 2 0.771 1.41 0.19
184T 4.5 3.75 5.5 0.4 1.13 2.8 2.75 2.5 0.986 1.78 0.25
203 5 4 5.5 0.4 0.75 3.1 2.25 2 0.643 1.53 0.19
204 5 4 6.5 0.4 0.75 3.1 2.25 2 0.643 1.53 0.19
213 5.3 4.25 5.5 0.4 1.13 3.5 3 2.75 0.986 2.03 0.25
213T 5.3 4.25 5.5 0.4 1.38 3.5 3.38 3.12 1.201 2.41 0.31
215 5.3 4.25 7 0.4 1.13 3.5 3 2.75 0.986 2.03 0.25
215T 5.3 4.25 7 0.4 1.38 3.5 3.38 3.12 1.201 2.41 0.31
224 5.5 4.5 6.75 0.4 1 3.5 3 2.75 0.857 2.03 0.25
225 5.5 4.5 7.5 0.4 1 3.5 3 2.75 0.857 2.03 0.25
254 6.3 5 8.25 0.5 1.13 4.3 3.37 3.12 0.986 2.03 0.25
254U 6.3 5 8.25 0.5 1.38 4.3 3.75 3.5 1.201 2.78 0.31
254T 6.3 5 8.25 0.5 1.63 4.3 4 3.75 1.416 2.91 0.38
256U 6.3 5 10 0.5 1.38 4.3 3.75 3.5 1.201 2.78 0.31
256T 6.3 5 10 0.5 1.63 4.3 4 3.75 1.416 2.91 0.38
284 7 5.5 9.5 0.5 1.25 4.8 3.75 3.5 0.986 2.03 0.25
284U 7 5.5 9.5 0.5 1.63 4.8 4.88 4.62 1.416 3.78 0.38
284T 7 5.5 9.5 0.5 1.88 4.8 4.62 4.38 1.591 3.28 0.5
284TS 7 5.5 9.5 0.5 1.63 4.8 3.25 3 1.416 1.91 0.38
286U 7 5.5 11 0.5 1.63 4.8 4.88 4.62 1.416 3.78 0.38
286T 7 5.5 11 0.5 1.88 4.8 4.62 4.38 1.591 3.28 0.5
286TS 7 5.5 11 0.5 1.63 4.8 3.25 3 1.416 1.91 3.75
324 8 6.25 10.5 0.7 1.63 5.3 4.87 4.62 1.416 3.78 0.38
324U 8 6.25 10.5 0.7 1.88 5.3 5.62 5.38 1.591 4.28 0.5
324S 8 6.25 10.5 0.7 1.63 5.3 3.25 3 1.416 1.91 0.38
324T 8 6.25 10.5 0.7 2.13 5.3 5.25 5 1.845 3.91 0.5
324TS 8 6.25 10.5 0.7 1.88 5.3 3.75 3.5 1.591 2.03 0.5
326 8 6.25 12 0.7 1.63 5.3 4.87 4.62 1.416 3.78 0.38
326U 8 6.25 12 0.7 1.88 5.3 5.62 5.38 1.591 4.28 0.5
326S 8 6.25 12 0.7 1.63 5.3 3.25 3 1.416 1.91 0.38
326T 8 6.25 12 0.7 2.13 5.3 5.25 5 1.845 3.91 0.5
326TS 8 6.25 12 0.7 1.88 5.3 3.75 3.5 1.591 2.03 0.5
364 9 7 11.3 0.7 1.88 5.9 5.62 5.38 1.591 4.28 0.5
364S 9 7 11.3 0.7 1.63 5.9 3.25 3 1.416 1.91 0.38
364U 9 7 11.3 0.7 2.13 5.9 6.37 6.12 1.845 5.03 0.5
364US 9 7 11.3 0.7 1.88 5.9 3.75 3.5 1.591 2.03 0.5
364T 9 7 11.3 0.7 2.38 5.9 5.88 5.62 2.01 4.28 0.63
364TS 9 7 11.3 0.7 1.88 5.9 3.75 3.5 1.591 2.03 0.5
365 9 7 12.3 0.7 1.88 5.9 5.62 5.38 1.591 4.28 0.5
365S 9 7 12.3 0.7 1.63 5.9 3.25 3 1.416 1.91 0.38
365U 9 7 12.3 0.7 2.13 5.9 6.37 6.12 1.845 5.03 0.5
365US 9 7 12.3 0.7 1.88 5.9 3.75 3.5 1.591 2.03 0.5
365T 9 7 12.3 0.7 2.38 5.9 5.88 5.62 2.021 4.28 0.63
365TS 9 7 12.3 0.7 1.88 5.9 3.75 3.5 1.591 2.03 0.5
404 10 8 12.3 0.8 2.13 6.6 6.37 6.12 1.845 5.03 0.5
404S 10 8 12.3 0.8 1.88 6.6 3.75 3.5 1.591 2.03 0.5
404U 10 8 12.3 0.8 2.38 6.6 7.12 6.88 2.021 5.53 0.63
404US 10 8 12.3 0.8 2.13 6.6 4.25 4 1.845 2.78 0.5
404T 10 8 12.3 0.8 2.88 6.6 7.25 7 2.45 5.65 0.75
404TS 10 8 12.3 0.8 2.13 6.6 4.25 4 1.845 2.78 0.5
405 10 8 13.8 0.8 2.13 6.6 6.37 6.12 1.845 5.03 0.5
405S 10 8 13.8 0.8 1.88 6.6 3.75 3.5 1.591 2.03 0.5
405U 10 8 13.8 0.8 2.38 6.6 7.12 6.88 2.021 5.53 0.63
405US 10 8 13.8 0.8 2.13 6.6 4.25 4 1.845 2.78 0.5
405T 10 8 13.8 0.8 2.88 6.6 7.25 7 2.45 5.65 0.75
405TS 10 8 13.8 0.8 2.13 6.6 4.25 4 1.845 2.78 0.5
444 11 9 14.5 0.8 2.38 7.5 7.12 6.88 2.021 5.53 0.63
444S 11 9 14.5 0.8 2.13 7.5 4.25 4 1.845 2.78 0.5
444U 11 9 14.5 0.8 2.88 7.5 8.62 8.38 2.45 7.03 0.75
444US 11 9 14.5 0.8 2.13 7.5 4.25 4 1.845 2.78 0.5
444T 11 9 14.5 0.8 3.38 7.5 8.5 8.25 2.88 6.91 0.88
444TS 11 9 14.5 0.8 2.38 7.5 4.75 4.5 2.021 3.03 0.63
445 11 9 16.5 0.8 2.38 7.5 7.12 6.88 2.021 5.53 0.63
445S 11 9 16.5 0.8 2.13 7.5 4.25 4 1.845 2.78 0.5
445U 11 9 16.5 0.8 2.88 7.5 8.62 8.38 2.45 7.03 0.75
445US 11 9 16.5 0.8 2.13 7.5 4.25 4 1.845 2.78 0.5
445T 11 9 16.5 0.8 3.38 7.5 8.5 8.25 2.88 6.91 0.88
445TS 11 9 16.5 0.8 2.38 7.5 4.75 4.5 2.021 3.03 0.63
447TS 11 9 20 MF MF MF MF MF MF MF MF
449TS 11 9 25 MF MF MF MF MF MF MF MF.
504U 13 10 16 0.9 2.88 8.5 8.62 8.38 2.45 7.28 0.75
505 13 10 18 0.9 2.88 8.5 8.62 8.38 2.45 7.28 0.75
505S 13 10 18 0.9 2.13 8.5 4.25 4 1.845 2.78 0.5

How to determine the Shaft Key size

see Explosion-Proof Exhaust Fans
see Explosion-Proof Pedestal Fans
see Hazardous Location Motors

see DC Motors
see General Application Motors

see Special Application Motors


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