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Our Electric Motor Dimensions Chart is a comprehensive resource that includes NEMA standard motors, metric, IEC frame motors, pre-NEMA motors, and 5000 frame size motors. We also provide a clear comparison of NEMA Frames versus horsepower and more! Please note the Electric Motor Dimensions Chart section is for general reference. If you need specific motor details, our dedicated customer service team is always here to support you, ensuring you have the information you need when you need it.
Downloadable Electric Motor Dimension Quick Reference - 
NEMA Electric Motor Dimensions
The National Electrical Manufacturers Association (NEMA) was established in 1926 and published standards for electric motors. NEMA frame size numbers provide manufacturers and users with key information about different electric motor dimensions. Motor frame sizes with the letter "T" means that the frame has been standardized across manufacturers to specific specifications such as horsepower, speed, and certain key dimensions such as shaft diameter, height, length and mounting base dimensions.
NEMA Footed T-Frame Motor Dimensions
| Frame Size | (A) | (BA) | (E) | (F1) | (F2) | (H) | (N-W) | (U) | (R) | (S) | (ES) | (AA) | (AB) | (C) | (D) | (O) | (P) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 42 | -- | -- | 1.75" | 1.6875" | -- | 0.28" | 1.50" | 0.375" | 0.3281" | -- | -- | 0.375" | 4.03125" | -- | 2.625" | 5.00" | 4.6875" |
| 48 | -- | -- | 2.125" | 2.75" |
-- | 0.34" | 1.875" | 0.50" | 0.4531" | -- | -- | 0.50" | 4.375" | -- | 3.00" | 5.875" | 5.0625" |
| 56C | 6.3" | 2.75" | 2.44" | 3.00" | -- | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.20" | 11.5" | 3.50" | 6.65" | 6.10" |
| 58HC | 6.3" | 2.75" | 2.44" | 3.00" | 5.00" | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.65" | 13.6" | 3.50" | 7.00" | 6.90" |
| 143T | 7" | 2.25" | 2.75" | 4.00" | -- | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 13.38" | 3.50" | 7.25" | 7.125" |
| 145T | 7" | 2.25" | 2.75" | 5.00" | -- | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 14.38" | 3.50" | 7.25" | 7.125" |
| 182T | 9" | 2.75" | 3.75" | 4.50" | -- | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 15.90" | 4.50" | 9.055" | 9.03" |
| 184T | 9" | 2.75" | 3.75" | 5.50" | -- | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 16.90" | 4.50" | 9.055" | 9.03" |
| 213T | 10.27" | 3.5" | 4.25" | 5.50" | -- | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 19.10" | 5.25" | 10.63" | 10.57" |
| 215T | 10.27" | 3.5" | 4.25" | 7.00" | -- | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 20.60" | 5.25" | 10.63" | 10.57" |
| 254T | 12.36" | 4.25" | 5.00" | 8.25" | -- | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 24.28" | 6.25" | 12.68" | 12.59" |
| 256T | 12.36" | 4.25" | 5.00" | 8.25" | 10.00" | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 26.01" | 6.25" | 12.68" | 12.59" |
| 284T | 13.8" | 4.75" | 5.50" | 9.50" | -- | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 27.73" | 7.00" | 14.53" | 14.26" |
| 284TS | 13.8" | 4.75" | 5.50" | 9.50" | -- | 0.53" | 3.25" | 1.625" |
1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 26.36" | 7.00" | 14.53" | 14.26" |
| 286T | 13.8" | 4.75" | 5.50" | 9.50" | 11.00" | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 29.23" | 7.00" | 14.53" | 14.26" |
| 286TS | 13.8" | 4.75" | 5.50" | 9.50" | 11.00" | 0.53" | 3.25" | 1.625" | 1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 27.86" | 7.00" | 14.53" | 14.26" |
| 324T | 15.4" | 5.25" | 6.25" | 10.50" | -- | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" |
| 324TS | 15.4" | 5.25" | 6.25" | 10.50" | -- | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 28.70" | 8.00" | 16.06" | 16.03" |
| 326T | 15.4" | 5.25" | 6.25" | 10.50" | 12.00" | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 31.70" | 8.00" | 16.06" | 16.03" |
| 326TS | 15.4" | 5.25" | 6.25" | 10.50" | 12.00" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" |
| 364T | 17.17" | 5.88" | 7.00" | 11.25" | -- | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 33.83" | 9.00" | 18.425" | 18.21" |
| 364TS | 17.17" | 5.88" | 7.00" | 11.25" | -- | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 31.70" | 9.00" | 18.425" | 18.21" |
| 365T | 17.17" | 5.88" | 7.00" | 11.25" | 12.25" | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 34.83" | 9.00" | 18.425" | 18.21" |
| 365TS | 17.17" | 5.88" | 7.00" | 11.25" | 12.25" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 32.70" | 9.00" | 18.425" | 18.21" |
| 404(5)T | 19.06" | 6.62" | 8.00" | 12.25" | 13.75" | 0.81" | 7.25" | 2.875" | 2.450" | 0.750" | 5.65" | 3.00" | 15.3" | 38.75" | 10.00" | 20.32" | 20.16" |
| 404(5)TS | 19.06" | 6.62" | 8.00" | 12.25" | 13.75" | 0.81" | 4.25" | 2.125" | 1.845" | 0.500" | 2.78" | 3.00" | 15.3" | 35.75" | 10.00" | 20.32" | 20.16" |
| 444(5)T | 21.93" | 7.50" | 9.00" | 14.50" | 16.50" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 44.52" | 11.00" | 22.20" | -- |
| 444(5)TS | 21.93" | 7.50" | 9.00" | 14.50" | 16.50" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 40.77" | 11.00" | 22.20" | -- |
| 447(9)T | 21.93" | 7.50" | 9.00" | 20.00" | 25.00" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 53.02" | 11.00" | 22.20" | -- |
| 449TS | 21.93" | 7.50" | 9.00" | 20.00" | 25.00" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 49.27" | 11.00" | 22.20" | -- |
NEMA C-Flange Electric Motor Dimensions
| Frame Size | (A) | (BA) | (E) | (H) | (N-W) | (U) | (R) | (S) | (ES) | (AA) | (AB) | (C) | (D) | (O) | (P) | (AJ) | (AK) | (BB) | (BD) | (BF) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56C | 6.3" | 2.75" | 2.44" | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.20" | 11.5" | 3.50" | 6.65" | 6.10" | 5.875" | 4.5" | 0.16" | 5.875" | 3/8-16 |
| 58HC | 6.3" | 2.75" | 2.44" | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.65" | 13.6" | 3.50" | 7.00" | 6.90" | 5.875" | 4.5" | 0.16" | 5.875" | 3/8-16 |
| 143T | 7" | 2.25" | 2.75" | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 13.38" | 3.50" | 7.25" | 7.125" | 5.875" | 4.5" | 0.16" | 6.50" | 3/8-16 |
| 145T | 7" | 2.25" | 2.75" | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 14.38" | 3.50" | 7.25" | 7.125" | 5.875" | 4.5" | 0.16" | 6.50" | 3/8-16 |
| 182T | 9" | 2.75" | 3.75" | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 15.90" | 4.50" | 9.055" | 9.03" | 7.25" | 8.5" | 0.25" | 8.95" | 1/2-13 |
| 184T | 9" | 2.75" | 3.75" | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 16.90" | 4.50" | 9.055" | 9.03" | 7.25" | 8.5" | 0.25" | 8.95" | 1/2-13 |
| 213T | 10.27" | 3.5" | 4.25" | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 19.10" | 5.25" | 10.63" | 10.57" | 7.25" | 8.5" | 0.25" | 8.95" | 1/2-13 |
| 215T | 10.27" | 3.5" | 4.25" | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 20.60" | 5.25" | 10.63" | 10.57" | 7.25" | 8.5" | 0.25" | 8.95" | 1/2-13 |
| 254T | 12.36" | 4.25" | 5.00" | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 24.28" | 6.25" | 12.68" | 12.59" | 7.25" | 8.5" | 0.25" | 10.00" | 1/2-13 |
| 256T | 12.36" | 4.25" | 5.00" | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 26.01" | 6.25" | 12.68" | 12.59" | 7.25" | 8.5" | 0.25" | 10.00" | 1/2-13 |
| 284T | 13.8" | 4.75" | 5.50" | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 27.73" | 7.00" | 14.53" | 14.26" | 9.00" | 10.5" | 0.25" | 11.25" | 1/2-13 |
| 284TS | 13.8" | 4.75" | 5.50" | 0.53" | 3.25" | 1.625" |
1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 26.36" | 7.00" | 14.53" | 14.26" | 9.00" | 10.5" | 0.25" | 11.25" | 1/2-13 |
| 286T | 13.8" | 4.75" | 5.50" | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 29.23" | 7.00" | 14.53" | 14.26" | 9.00" | 10.5" | 0.25" | 11.25" | 1/2-13 |
| 286TS | 13.8" | 4.75" | 5.50" | 0.53" | 3.25" | 1.625" | 1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 27.86" | 7.00" | 14.53" | 14.26" | 9.00" | 10.5" | 0.25" | 11.25" | 1/2-13 |
| 324T | 15.4" | 5.25" | 6.25" | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 324TS | 15.4" | 5.25" | 6.25" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 28.70" | 8.00" | 16.06" | 16.03" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 326T | 15.4" | 5.25" | 6.25" | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 31.70" | 8.00" | 16.06" | 16.03" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 326TS | 15.4" | 5.25" | 6.25" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 364T | 17.17" | 5.88" | 7.00" | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 33.83" | 9.00" | 18.425" | 18.21" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 364TS | 17.17" | 5.88" | 7.00" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 31.70" | 9.00" | 18.425" | 18.21" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 365T | 17.17" | 5.88" | 7.00" | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 34.83" | 9.00" | 18.425" | 18.21" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 365TS | 17.17" | 5.88" | 7.00" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 32.70" | 9.00" | 18.425" | 18.21" | 11.00" | 12.5" | 0.25" | 14.00" | 5/8-11 |
| 404(5)T | 19.06" | 6.62" | 8.00" | 0.81" | 7.25" | 2.875" | 2.450" | 0.750" | 5.65" | 3.00" | 15.3" | 38.75" | 10.00" | 20.32" | 20.16" | 11.00" | 12.5" | 0.25" | 15.50" | 5/8-11 |
| 404(5)TS | 19.06" | 6.62" | 8.00" | 0.81" | 4.25" | 2.125" | 1.845" | 0.500" | 2.78" | 3.00" | 15.3" | 35.75" | 10.00" | 20.32" | 20.16" | 11.00" | 12.5" | 0.25" | 15.50" | 5/8-11 |
| 444(5)T | 21.93" | 7.50" | 9.00" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 44.52" | 11.00" | 22.20" | -- | 14.00" | 16.0" | 0.25" | 18.00" | 5/8-11 |
| 444(5)TS | 21.93" | 7.50" | 9.00" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 40.77" | 11.00" | 22.20" | -- | 14.00" | 16.0" | 0.25" | 18.00" | 5/8-11 |
| 447(9)T | 21.93" | 7.50" | 9.00" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 53.02" | 11.00" | 22.20" | -- | 14.00" | 16.0" | 0.25" | 18.00" | 5/8-11 |
| 449TS | 21.93" | 7.50" | 9.00" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 49.27" | 11.00" | 22.20" | -- |
14.00" | 16.0" | 0.25" | 18.00" | 5/8-11 |
NEMA D-Flange Electric Motor Dimensions
| Frame Size | (A) | (BA) | (E) | (H) | (N-W) | (U) | (R) | (S) | (ES) | (AA) | (AB) | (C) | (D) | (O) | (P) | (AJ) | (AK) | (BB) | (BD) | (BF) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56C | 6.3" | 2.75" | 2.44" | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.20" | 11.5" | 3.50" | 6.65" | 6.10" | -- | -- | -- | -- | -- |
| 58HC | 6.3" | 2.75" | 2.44" | 0.335" | 1.875" | 0.625" | 0.517" | 0.1875" | 1.41" | 0.50" | 5.65" | 13.6" | 3.50" | 7.00" | 6.90" | -- | -- | -- | -- | -- |
| 143T | 7" | 2.25" | 2.75" | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 13.38" | 3.50" | 7.25" | 7.125" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 145T | 7" | 2.25" | 2.75" | 0.34" | 2.25" | 0.875" | 0.771" | 0.188" | 1.41" | 0.75" | 5.90" | 14.38" | 3.50" | 7.25" | 7.125" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 182T | 9" | 2.75" | 3.75" | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 15.90" | 4.50" | 9.055" | 9.03" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 184T | 9" | 2.75" | 3.75" | 0.41" | 2.75" | 1.125" | 0.986" | 0.250" | 1.78" | 0.75" | 7.17" | 16.90" | 4.50" | 9.055" | 9.03" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 213T | 10.27" | 3.5" | 4.25" | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 19.10" | 5.25" | 10.63" | 10.57" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 215T | 10.27" | 3.5" | 4.25" | 0.41" | 3.38" | 1.375" | 1.201" | 0.312" | 2.42" | 1.00" | 7.95" | 20.60" | 5.25" | 10.63" | 10.57" | 10.0" | 9.0" | 0.25" | 11.0" | 0.53" |
| 254T | 12.36" | 4.25" | 5.00" | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 24.28" | 6.25" | 12.68" | 12.59" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 256T | 12.36" | 4.25" | 5.00" | 0.53" | 4.00" | 1.625" | 1.416" | 0.375" | 2.81" | 1.25" | 10.10" | 26.01" | 6.25" | 12.68" | 12.59" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 284T | 13.8" | 4.75" | 5.50" | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 27.73" | 7.00" | 14.53" | 14.26" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 284TS | 13.8" | 4.75" | 5.50" | 0.53" | 3.25" | 1.625" |
1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 26.36" | 7.00" | 14.53" | 14.26" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 286T | 13.8" | 4.75" | 5.50" | 0.53" | 4.62" | 1.875" | 1.591" | 0.500" | 3.28" | 1.50" | 10.83" | 29.23" | 7.00" | 14.53" | 14.26" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 286TS | 13.8" | 4.75" | 5.50" | 0.53" | 3.25" | 1.625" | 1.416" | 0.375" | 1.91" | 1.50" | 10.83" | 27.86" | 7.00" | 14.53" | 14.26" | 12.5" | 11.0" | 0.25" | 14.0" | 0.81" |
| 324T | 15.4" | 5.25" | 6.25" | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 324TS | 15.4" | 5.25" | 6.25" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 28.70" | 8.00" | 16.06" | 16.03" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 326T | 15.4" | 5.25" | 6.25" | 0.66" | 5.25" | 2.125" | 1.845" | 0.500" | 2.03" | 2.00" | 13.0" | 31.70" | 8.00" | 16.06" | 16.03" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 326TS | 15.4" | 5.25" | 6.25" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 2.00" | 13.0" | 30.20" | 8.00" | 16.06" | 16.03" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 364T | 17.17" | 5.88" | 7.00" | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 33.83" | 9.00" | 18.425" | 18.21" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 364TS | 17.17" | 5.88" | 7.00" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 31.70" | 9.00" | 18.425" | 18.21" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 365T | 17.17" | 5.88" | 7.00" | 0.66" | 5.88" | 2.375" | 2.021" | 0.625" | 4.28" | 3.00" | 14.2" | 34.83" | 9.00" | 18.425" | 18.21" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 365TS | 17.17" | 5.88" | 7.00" | 0.66" | 3.75" | 1.875" | 1.591" | 0.500" | 2.03" | 3.00" | 14.2" | 32.70" | 9.00" | 18.425" | 18.21" | 16.0" | 14.0" | 0.25" | 18.0" | 0.81" |
| 404(5)T | 19.06" | 6.62" | 8.00" | 0.81" | 7.25" | 2.875" | 2.450" | 0.750" | 5.65" | 3.00" | 15.3" | 38.75" | 10.00" | 20.32" | 20.16" | 20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
| 404(5)TS | 19.06" | 6.62" | 8.00" | 0.81" | 4.25" | 2.125" | 1.845" | 0.500" | 2.78" | 3.00" | 15.3" | 35.75" | 10.00" | 20.32" | 20.16" | 20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
| 444(5)T | 21.93" | 7.50" | 9.00" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 44.52" | 11.00" | 22.20" | -- | 20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
| 444(5)TS | 21.93" | 7.50" | 9.00" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 40.77" | 11.00" | 22.20" | -- | 20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
| 447(9)T | 21.93" | 7.50" | 9.00" | 0.81" | 8.50" | 3.375" | 2.880" | 0.875" | 6.91" | 3.00" | 18.0" | 53.02" | 11.00" | 22.20" | -- | 20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
| 449TS | 21.93" | 7.50" | 9.00" | 0.81" | 4.75" | 2.375" | 2.021" | 0.625" | 3.03" | 3.00" | 18.0" | 49.27" | 11.00" | 22.20" | -- |
20.0" | 18.0" | 0.25" | 22.0" | 0.81" |
Metric IEC Electric Motor Dimensions
The International Electrotechnical Commission (IEC) establishes certain standards related to efficiency, power output and motor size dimensions. IEC electric motors are very popular worldwide and was founded in England in 1906. The below charts include IEC electric motor dimensions for frame sizes 56 - 280M, for additional information contact our customer service team and we will gladly assist you!
Metric IEC Footed B3 Electric Motor Dimensions
| Frame Size | (AB) | (C) | (A) | (B) | (2B) | (K) | (E) | (D) | (G) | (F) | (DB) | (KK) | (L) | (H) | (HD) | (AC) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56 | 110mm | 36mm | 90mm | 71mm | -- | 5.8mm | 20mm | 9mm | 7.2mm | 3mm | M3 | M16X1.5 | 196mm | 56mm | 156mm | 90mm |
| 63 | 120mm | 40mm | 100mm | 80mm | -- | 7mm | 23mm | 11mm | 8.5mm | 4mm | M4 | M16X1.5 | 220mm | 63mm | 171mm | 130mm |
| 71 | 132mm | 45mm | 112mm | 90mm | -- | 7mm | 30mm | 14mm | 11mm | 5mm | M5 | M16X1.5 | 241mm | 71mm | 179mm | 139.6mm |
| 80 | 160mm | 50mm | 125mm | 100mm | -- | 10mm | 40mm | 19mm | 15.5mm | 6mm | M6 | M16X1.5 | 289mm | 80mm | 217mm | 156mm |
| 90S | 175mm | 56mm | 140mm | 100mm | -- | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 312mm | 90mm | 228mm | 177mm |
| 90L | 175mm | 56mm | 140mm | 125mm | -- | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 337mm | 90mm | 228mm | 177mm |
| 100L | 200mm | 63mm | 160mm | 140mm | -- | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M20X1.5 | 380mm | 100mm | 258mm | 200mm |
| 112M | 230mm | 70mm | 190mm | 140mm | -- | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M25X1.5 | 400mm | 112mm | 280mm | 220mm |
| 132S | 255mm | 89mm | 216mm | 140mm | -- | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 460mm | 132mm | 319mm | 261mm |
| 132M | 255mm | 89mm | 216mm | 178mm | -- | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 500mm | 132mm | 319mm | 261mm |
| 160M | 314mm | 108mm | 254mm | 210mm | -- | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 605mm | 160mm | 410mm | 313mm |
| 160L | 314mm | 108mm | 254mm | 210mm | 254mm | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 650mm | 160mm | 410mm | 313mm |
| 180M | 348mm | 121mm | 279mm | 241mm | -- | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 687mm | 180mm | 448mm | 360mm |
| 180L | 348mm | 121mm | 279mm | 241mm | 279mm | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 725mm | 180mm | 448mm | 360mm |
| 200L | 388mm | 133mm | 318mm | 305mm | -- | 19mm | 110mm | 55mm | 49mm | 16mm | M20 | M40X1.5 | 768mm | 200mm | 500mm | 399mm |
| 225S | 436mm | 149mm | 356mm | 286mm | -- | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 814mm | 225mm | 560mm | 456mm |
| 225M | 436mm | 149mm | 356mm | 286mm | 311mm | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 839mm | 225mm | 560mm | 456mm |
| 250M | 484mm | 168mm | 406mm | 349mm | -- | 24mm | 140mm | 65mm | 67.5mm | 20mm | M20 | M50X1.5 | 918mm | 250mm | 611mm | 506mm |
| 280S | 557mm | 190mm | 457mm | 368mm | -- | 28mm | 140mm | 65mm | 58mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm |
| 280M | 557mm | 190mm | 457mm | 368mm | 419mm | 28mm | 140mm | 75mm | 71mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm |
Metric IEC Footed B14 Electric Motor Dimensions
| Frame Size | (AB) | (C) | (A) | (K) | (E) | (D) | (G) | (F) | (DB) | (KK) | (L) | (H) | (HD) | (AC) | (M) | (N) | (T) | (P) | (S) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56 | 110mm | 36mm | 90mm | 5.8mm | 20mm | 9mm | 7.2mm | 3mm | M3 | M16X1.5 | 196mm | 56mm | 156mm | 90mm | 65mm | 50mm | 2.5mm | 80mm | M5 |
| 63 | 120mm | 40mm | 100mm | 7mm | 23mm | 11mm | 8.5mm | 4mm | M4 | M16X1.5 | 220mm | 63mm | 171mm | 130mm | 75mm | 60mm | 2.5mm | 90mm | M5 |
| 71 | 132mm | 45mm | 112mm | 7mm | 30mm | 14mm | 11mm | 5mm | M5 | M16X1.5 | 241mm | 71mm | 179mm | 139.6mm | 85mm | 70mm | 2.5mm | 105mm | M6 |
| 80 | 160mm | 50mm | 125mm | 10mm | 40mm | 19mm | 15.5mm | 6mm | M6 | M16X1.5 | 289mm | 80mm | 217mm | 156mm | 100mm | 80mm | 3mm | 120mm | M6 |
| 90S | 175mm | 56mm | 140mm | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 312mm | 90mm | 228mm | 177mm | 115mm | 95mm | 3mm | 140mm | M8 |
| 90L | 175mm | 56mm | 140mm | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 337mm | 90mm | 228mm | 177mm | 115mm | 95mm | 3mm | 140mm | M8 |
| 100L | 200mm | 63mm | 160mm | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M20X1.5 | 380mm | 100mm | 258mm | 200mm | 130mm | 110mm | 3.5mm | 160mm | M8 |
| 112M | 230mm | 70mm | 190mm | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M25X1.5 | 400mm | 112mm | 280mm | 220mm | 130mm | 110mm | 3.5mm | 200mm | M8 |
| 132S | 255mm | 89mm | 216mm | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 460mm | 132mm | 319mm | 261mm | 165mm | 130mm | 3.5mm | 200mm | M10 |
| 132M | 255mm | 89mm | 216mm | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 500mm | 132mm | 319mm | 261mm | 165mm | 130mm | 3.5mm | 200mm | M10 |
| 160M | 314mm | 108mm | 254mm | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 605mm | 160mm | 410mm | 313mm | 215mm | 180mm | 4mm | 250mm | M12 |
| 160L | 314mm | 108mm | 254mm | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 650mm | 160mm | 410mm | 313mm | 215mm | 180mm | 4mm | 250mm | M12 |
| 180M | 348mm | 121mm | 279mm | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 687mm | 180mm | 448mm | 360mm | -- | -- | -- | -- | -- |
| 180L | 348mm | 121mm | 279mm | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 725mm | 180mm | 448mm | 360mm | -- | -- | -- | -- | -- |
| 200L | 388mm | 133mm | 318mm | 19mm | 110mm | 55mm | 49mm | 16mm | M20 | M40X1.5 | 768mm | 200mm | 500mm | 399mm | -- | -- | -- | -- | -- |
| 225S | 436mm | 149mm | 356mm | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 814mm | 225mm | 560mm | 456mm | -- | -- | -- | -- | -- |
| 225M | 436mm | 149mm | 356mm | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 839mm | 225mm | 560mm | 456mm | -- | -- | -- | -- | -- |
| 250M | 484mm | 168mm | 406mm | 24mm | 140mm | 65mm | 67.5mm | 20mm | M20 | M50X1.5 | 918mm | 250mm | 611mm | 506mm | -- | -- | -- | -- | -- |
| 280S | 557mm | 190mm | 457mm | 28mm | 140mm | 65mm | 58mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm | -- | -- | -- | -- | -- |
| 280M | 557mm | 190mm | 457mm | 28mm | 140mm | 75mm | 71mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm | -- | -- | -- | -- | -- |
Metric IEC Footed B5 Electric Motor Dimensions
| Frame Size | (AB) | (C) | (A) | (K) | (E) | (D) | (G) | (F) | (DB) | (KK) | (L) | (H) | (HD) | (AC) | (M) | (N) | (T) | (P) | (S) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56 | 110mm | 36mm | 90mm | 5.8mm | 20mm | 9mm | 7.2mm | 3mm | M3 | M16X1.5 | 196mm | 56mm | 156mm | 90mm | 100mm | 80mm | 3mm | 120mm | 7mm |
| 63 | 120mm | 40mm | 100mm | 7mm | 23mm | 11mm | 8.5mm | 4mm | M4 | M16X1.5 | 220mm | 63mm | 171mm | 130mm | 115mm | 95mm | 3mm | 140mm | 10mm |
| 71 | 132mm | 45mm | 112mm | 7mm | 30mm | 14mm | 11mm | 5mm | M5 | M16X1.5 | 241mm | 71mm | 179mm | 139.6mm | 130mm | 110mm | 3.5mm | 160mm | 10mm |
| 80 | 160mm | 50mm | 125mm | 10mm | 40mm | 19mm | 15.5mm | 6mm | M6 | M16X1.5 | 289mm | 80mm | 217mm | 156mm | 165mm | 130mm | 3.5mm | 200mm | 12mm |
| 90S | 175mm | 56mm | 140mm | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 312mm | 90mm | 228mm | 177mm | 165mm | 130mm | 3.5mm | 200mm | 12mm |
| 90L | 175mm | 56mm | 140mm | 10mm | 50mm | 24mm | 20mm | 8mm | M8 | M20X1.5 | 337mm | 90mm | 228mm | 177mm | 165mm | 130mm | 3.5mm | 200mm | 12mm |
| 100L | 200mm | 63mm | 160mm | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M20X1.5 | 380mm | 100mm | 258mm | 200mm | 215mm | 180mm | 4mm | 250mm | 15mm |
| 112M | 230mm | 70mm | 190mm | 12mm | 60mm | 28mm | 24mm | 8mm | M10 | M25X1.5 | 400mm | 112mm | 280mm | 220mm | 215mm | 180mm | 4mm | 250mm | 15mm |
| 132S | 255mm | 89mm | 216mm | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 460mm | 132mm | 319mm | 261mm | 265mm | 230mm | 4mm | 300mm | 15mm |
| 132M | 255mm | 89mm | 216mm | 12mm | 80mm | 38mm | 33mm | 10mm | M12 | M25X1.5 | 500mm | 132mm | 319mm | 261mm | 265mm | 230mm | 4mm | 300mm | 15mm |
| 160M | 314mm | 108mm | 254mm | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 605mm | 160mm | 410mm | 313mm | 300mm | 250mm | 5mm | 350mm | 19mm |
| 160L | 314mm | 108mm | 254mm | 15mm | 110mm | 42mm | 37mm | 12mm | M16 | M32X1.5 | 650mm | 160mm | 410mm | 313mm | 300mm | 250mm | 5mm | 350mm | 19mm |
| 180M | 348mm | 121mm | 279mm | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 687mm | 180mm | 448mm | 360mm | 300mm | 250mm | 5mm | 350mm | 19mm |
| 180L | 348mm | 121mm | 279mm | 15mm | 110mm | 48mm | 42.5mm | 14mm | M16 | M32X1.5 | 725mm | 180mm | 448mm | 360mm | 300mm | 250mm | 5mm | 350mm | 19mm |
| 200L | 388mm | 133mm | 318mm | 19mm | 110mm | 55mm | 49mm | 16mm | M20 | M40X1.5 | 768mm | 200mm | 500mm | 399mm | 350mm | 300mm | 5mm | 400mm | 19mm |
| 225S | 436mm | 149mm | 356mm | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 814mm | 225mm | 560mm | 456mm | 400mm | 350mm | 5mm | 450mm | 19mm |
| 225M | 436mm | 149mm | 356mm | 19mm | 140mm | 60mm | 53mm | 18mm | M20 | M50X1.5 | 839mm | 225mm | 560mm | 456mm | 400mm | 350mm | 5mm | 450mm | 19mm |
| 250M | 484mm | 168mm | 406mm | 24mm | 140mm | 65mm | 67.5mm | 20mm | M20 | M50X1.5 | 918mm | 250mm | 611mm | 506mm | 500mm | 450mm | 5mm | 550mm | 19mm |
| 280S | 557mm | 190mm | 457mm | 28mm | 140mm | 65mm | 58mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm | 500mm | 450mm | 5mm | 550mm | 19mm |
| 280M | 557mm | 190mm | 457mm | 28mm | 140mm | 75mm | 71mm | 22mm | M20 | M50X1.5 | 1035mm | 280mm | 675mm | 559mm | 500mm | 450mm | 5mm | 550mm | 19mm |
Pre-NEMA Motor Dimensions
| Frame Size | (U) | (V) | (D) | (2F) | (E) | --- | Frame Size | (U) | (V) | (D) | (2F) | (E) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 203 | 3/4" | 2" | 5" | 5-1/2" | 4" | --- | 404 | 2-1/8" | 6-1/8" | 10" | 12-1/4" | 8" |
| 204 | 3/4" | 2" | 5" | 6-1/2" | 4" | --- | 404S | 1-7/8" | 3-1/2" | 10" | 12-1/4" | 8" |
| 224 | 1" | 2-3/4" | 5-1/2" | 6-3/4" | 4-1/2" | --- | 405 | 2-1/8" | 6-1/8" | 10" | 13-3/4" | 8" |
| 225 | 1" | 2-3/4" | 5-1/2" | 7-1/2" | 4-1/2" | --- | 405S | 1-7/8" | 3-1/2" | 10" | 13-3/4" | 8" |
| 254 | 1-1/8" | 3-1/8" | 6-1/4" | 8-1/4" | 5" | --- | 444 | 2-3/8" | 6-7/8" | 11" | 14-1/2" | 9" |
| 284 | 1-1/4" | 3-3/4" | 7" | 9-1/2" | 5-1/2" | --- | 444S | 2-1/8" | 4" | 11" | 14-1/2" | 9" |
| 324 | 1-5/8" | 4-5/8" | 8" | 10-1/2" | 6-1/4" | --- | 445 | 2-3/8" | 6-7/8" | 11" | 16-1/2" | 9" |
| 324S | 1-5/8" | 3" | 8" | 10-1/2" | 6-1/4" | --- | 445S | 2-1/8" | 4" | 11" | 16-1/2" | 9" |
| 326 | 1-5/8" | 4-5/8" | 8" | 12" | 6-1/4" | --- | 504 | 2-5/8" | 7-5/8" | 12-1/2" | 16" | 8" |
| 326S | 1-5/8" | 3" | 8" | 12" | 6-1/4" | --- | 504S | 2-1/8" | 4" | 12-1/2" | 16" | 8" |
| 364 | 1-7/8" | 5-3/8" | 9" | 11-1/4" | 7" | --- | 505 | 2-7/8" | 8-3/8" | 12-1/2" | 18" | 9" |
| 364S | 1-7/8" | 3-1/2" | 9" | 11-1/4" | 7" | --- | 505S | 2-1/8" | 4" | 12-1/2" | 18" | 9" |
| 365 | 1-7/8" | 5-3/8" | 9" | 12-1/4" | 7" | --- | 584 | 2-7/8" | 11-5/8" | 14-1/2" | 18" | 9" |
| 365S | 1-5/8" | 3-1/2" | 9" | 12-1/4" | 7" | --- | 584S | 2-3/8" | 4-3/4" | 14-1/2" | 18" | 9" |
5000 Frame Motor Dimensions
| Frame Size | (D) | (E) | (2F) | (H) | (O) | (P) | (U) | (V) | (AA) | (AB) | (BA) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5007S | 12-1/2" | 10" | 22" | 15/16" | 26-27/32" | 30" | 2-1/2" | 6-1/2" | 4-NPT | 26-7/8" | 8-1/2" |
| 5007L | 12-1/2" | 10" | 22" | 15/16" | 26-27/32" | 30" | 3-7/8" | 11-1/8" | 4-NPT | 26-7/8" | 8-1/2" |
| 5009S | 12-1/2" | 10" | 28" | 15/16" | 26-27/32" | 30" | 2-1/2" | 6-1/2" | 4-NPT | 26-7/8" | 8-1/2" |
| 5009L | 12-1/2" | 10" | 28" | 15/16" | 26-27/32" | 30" | 3-7/8" | 11-1/8" | 4-NPT | 26-7/8" | 8-1/2" |
| 5011S | 12-1/2" | 10" | 36" | 15/16" | 26-27/32" | 30" | 2-1/2" | 6-1/2" | 4-NPT | 26-7/8" | 8-1/2" |
| 5011L | 12-1/2" | 10" | 36" | 15/16" | 26-27/32" | 30" | 3-7/8" | 11-1/8" | 4-NPT | 26-7/8" | 8-1/2" |
NEMA Frame Sizes VS Horsepower
| Horsepower | T-Frames 1964-Present (900RPM) | U-Frames 1952-Present (900RPM) | Original NEMA (900RPM) | T-Frames 1964-Present (1200RPM) | U-Frames 1952-Present (1200RPM) | Original NEMA (1200RPM) | T-Frames 1964-Present (1800RPM) | U-Frames 1952-Present (1800RPM) | Original NEMA (1800RPM) | T-Frames 1964-Present (3600RPM) | U-Frames 1952-Present (3600RPM) | Original NEMA (3600RPM) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 182T | 213 | 225 | 145T | 184 | 204 | 143T | 182 | 203 | -- | -- | -- |
| 1.5 | 184T | 213 | 254 | 182T | 184 | 224 | 145T | 184 | 204 | 143T | 182 | 203 |
| 2 | 213T | 215 | 254 | 184T | 213 | 225 | 145T | 184 | 224 | 145T | 184 | 204 |
| 3 | 215T | 254U | 284 | 213T | 215 | 254 | 182T | 213 | 225 | 145T/ 182T | 184 | 224 |
| 5 | 254T | 256U | 324 | 215T | 254U | 284 | 184T | 215 | 254 | 182T/ 184T | 213 | 225 |
| 7.5 | 256T | 284U | 326 | 254T | 256U | 324 | 213T | 254U | 284 | 184T/ 213T | 215 | 254 |
| 10 | 284T | 286U | 364 | 256T | 284U | 326 | 215T | 256U | 324 | 213T/ 215T | 254U | 284 |
| 15 | 286T | 326U | 365 | 284T | 324U | 364 | 254T | 284U | 326 | 215T/ 254T | 256U | 324 |
| 20 | 324T | 364U | 404 | 286T | 326U | 365 | 256T | 286U | 364 | 254T/ 256T | 284U/ 286U | 326 |
| 25 | 326T | 265U | 405 | 324T | 364U | 404 | 284T | 324U | 364/ 365 | 256T/ 284TS | 286U/ 324U | 364S/ 365S |
| 30 | 364T | 404U | 444 | 324T | 365U | 405 | 286T | 326U | 365/ 404 | 284TS/ 286TS | 324S/ 326S | 364S/ 404S |
| 40 | 365T | 405U | 445 | 364T | 404U | 444 | 324T | 364U | 404/ 405 | 286TS/ 324TS | 326S/ 364US | 365S/ 404S |
| 50 | 404T | 444U | 504 | 365T | 405U | 445 | 326T | 365US | 405S/ 444 | 324TS/ 326TS | 364US | 404S/ 444S |
| 60 | 405T | 445U | 505 | 404T | 444U | 504 | 364T | 404US/ 405US | 444S/ 445S | 326TS/ 364TS | 365US/ 405US | 405S/ 445S |
| 75 | 444T | -- | -- | 405T | 445U | 505 | 365TS | 405US/ 444US | 445S/ 504S | 364TS/ 365TS | 404US/ 444US | 444S/ 504S |
| 100 | 445T | -- | -- | 444T | -- | -- | 404TS/ 405TS | 444US/ 445US | 504S/ 505S | 365TS/ 405TS | 405US/ 445US | 445S/ 505S |
| 125 | -- | -- | -- | 445T | -- | -- | 405TS/ 444TS | 445US | 505S | 404TS/ 444TS | 444US | 504S |
| 150 | -- | -- | -- | -- | -- | -- | 444TS/ 445TS | -- | -- | 405TS/ 445TS | 445US | 505S |
| 200 | -- | -- | -- | -- | -- | -- | 445TS | -- | -- | 444TS | -- | -- |
| 250 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 445TS | -- | -- |
FAQs About Electric Motor Frame Sizes
Below you can find a list of commonly asked questions about the sizes of electric motors. Feel free to reach out and contact us if you'd like additional informations, our experts are here to help!
What is an electric motor frame size chart?
An electric motor frame size chart lists the standardized mounting and shaft dimensions for each NEMA and IEC frame number, so you can match a replacement motor without measuring every part. It shows shaft height (D), shaft diameter (U), bolt-hole spacing (2F and BA), and the overall footprint for common frames like 56, 143T, and 215T.
What are NEMA motor frame sizes?
NEMA motor frame sizes are standardized frame numbers (such as 42, 48, 56, 143T, 145T, and 182T) that fix a motor's mounting pattern and shaft dimensions in inches. Because they are standardized, any two motors with the same NEMA frame bolt up and couple the same way, which makes swapping motors straightforward.
What are the dimensions of a 56 frame motor?
A NEMA 56 frame motor has a shaft height (D) of 3.5 inches and a 5/8 inch (0.625") keyed shaft, with a BA of 2.75 inches and 3.00 inch mounting-bolt spacing. The 56 frame is one of the most common sizes for fractional and 1 HP motors used on pumps, fans, and compressors.
How do I read an electric motor frame number?
For frames 143T and larger, divide the first two digits by 4 to get the shaft height in inches, so a 143T has a 3.5 inch shaft height. For small frames like 42, 48, and 56, divide the number by 16. A trailing "T" indicates the current standard shaft dimensions.
What motor shaft size goes with each frame?
Shaft diameter is tied to the frame size. A 56 frame uses a 5/8 inch shaft, a 143T and 145T use a 7/8 inch shaft, and a 182T and 184T use a 1-1/8 inch shaft. Our motor shaft size chart lists the shaft diameter, keyway, and usable length for every standard frame.
What is the difference between NEMA and IEC motor frames?
NEMA frames are the North American standard and are sized in inches (for example 56 or 213T), while IEC frames are the international metric standard sized in millimeters (for example D80 or D90, where the number is the shaft height in mm). They are not directly interchangeable, so check both the frame dimensions and the shaft size before replacing one with the other.
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