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NEMA electrical motor frame sizes
Dimensions of electrical motor frames according NEMA 1984 are indicated below:
- 1 in (inch) = 25.4 mm
NEMA Frame Designation | Frame Dimensions (inches) | ||||||
---|---|---|---|---|---|---|---|
D | E | 2F | BA | N-W | V | U | |
42 | 2 5/8 | 1 3/4 | 11/16 | 2 1/16 | 1 1/8 | 3/8 | |
42C | 2 5/8 | 1 3/4 | 11/16 | 2 1/16 | 1 1/8 | 3/8 | |
48 | 3 | 2 1/8 | 2 3/4 | 2 1/2 | 1 1/2 | 1/2 | |
48C | 3 | 2 1/8 | 2 3/4 | 2 1/2 | 1 1/2 | 1/2 | |
48H | 3 | 2 1/8 | 4 3/4 | 2 1/2 | 1 1/2 | 1/2 | |
56 | 3 1/2 | 2 7/16 | 3 | 2 3/4 | 1 7/8 | 5/8 | |
56C | 3 1/2 | 2 7/16 | 2 3/4 | 1 7/8 | 5/8 | ||
56H | 3 1/2 | 2 7/16 | 5 | 2 3/4 | 1 7/8 | 5/8 | |
56HZ | 3 1/2 | 2 7/16 | 5 | 2 3/4 | 2 1/4 | 2 | 7/8 |
56J | 3 1/2 | 2 7/16 | 2 3/4 | 2 7/16 | 5/8 | ||
66 | 4 1/8 | 2 15/16 | 5 | 3 1/8 | 2 1/4 | 3/4 | |
140T | 3 1/2 | 2 3/4 | 4 | 2 3/4 | 2 1/4 | 7/8 | |
142AT | 3 1/2 | 2 3/4 | 3 1/4 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
143AT | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 1 3/4 | 1 1/2 | 7/8 |
143JM | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 7/8 | ||
143JP | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 7/8 | ||
143T | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 2 1/4 | 2 | 7/8 |
143TC | 3 1/2 | 2 3/4 | 4 | 2 3/4 | 2 1/4 | 7/8 | |
143TR | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 2 5/8 | 1 3/4 | 7/8 |
144AT | 3 1/2 | 2 3/4 | 4 1/2 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
145AT | 3 1/2 | 2 3/4 | 5 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
145JM | 3 1/2 | 2 3/4 | 5 | 2 1/4 | 7/8 | ||
145JP | 3 1/2 | 2 3/4 | 5 | 2 1/4 | 7/8 | ||
145T | 3 1/2 | 2 3/4 | 5 | 2 1/4 | 2 1/4 | 2 | 7/8 |
145TC | 3 1/2 | 2 3/4 | 5 | 2 3/4 | 2 1/4 | 7/8 | |
145TR | 3 1/2 | 2 3/4 | 5 | 2 1/4 | 2 5/8 | 1 3/4 | 7/8 |
146AT | 3 1/2 | 2 3/4 | 5 1/2 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
146ATC | 3 1/2 | 2 3/4 | 5 1/2 | 2 3/4 | 2 1/4 | 7/8 | |
147AT | 3 1/2 | 2 3/4 | 6 1/4 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
148AT | 3 1/2 | 2 3/4 | 7 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
149AT | 3 1/2 | 2 3/4 | 8 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
1410AT | 3 1/2 | 2 3/4 | 9 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
1411AT | 3 1/2 | 2 3/4 | 10 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
1412AT | 3 1/2 | 2 3/4 | 11 | 2 3/4 | 1 3/4 | 1 1/2 | 7/8 |
1412ATC | 3 1/2 | 2 3/4 | 11 | 2 3/4 | 2 1/4 | 7/8 | |
162AT | 4 | 3 1/8 | 4 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
163AT | 4 | 3 1/8 | 4 1/2 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
164AT | 4 | 3 1/8 | 2 1/2 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
165AT | 4 | 3 1/8 | 5 1/22 1/2 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
166AT | 4 | 3 1/8 | 6 1/4 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
167AT | 4 | 3 1/8 | 7 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
168AT | 4 | 3 1/8 | 8 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
169AT | 4 | 3 1/8 | 9 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
1610AT | 4 | 3 1/8 | 10 | 2 1/2 | 1 3/4 | 1 1/2 | 7/8 |
182 | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 1/4 | 2 | 7/8 |
L182ACY | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 1/4 | 2 | 7/8 |
182AT | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
L182AT | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 | 1 1/8 | |
182JM | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 7/8 | ||
182JP | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 3/4 | 7/8 | |
182T | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 3/4 | 2 1/2 | 1 1/8 |
182TC | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 3 3/8 | 1 1/8 | |
182TR | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 2 1/4 | 2 1/4 | 1 1/8 |
183AT | 4 1/2 | 3 3/4 | 5 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
184 | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 2 1/4 | 2 | 7/8 |
184AT | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
184JM | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 7/8 | ||
184JP | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 7/8 | ||
184TC | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 2 3/4 | 1 1/8 | |
184T | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 2 3/4 | 2 1/2 | 1 1/8 |
184TR | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 3 3/8 | 2 1/4 | 1 1/8 |
185AT | 4 1/2 | 3 3/4 | 6 1/4 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
186ACY | 4 1/2 | 3 3/4 | 7 | 2 3/4 | 2 1/4 | 2 | 7/8 |
186AT | 4 1/2 | 3 3/4 | 7 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
L186AT | 4 1/2 | 3 3/4 | 7 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
186ATC | 4 1/2 | 3 3/4 | 7 | 2 3/4 | 2 1/4 | 1 1/8 | |
187AT | 4 1/2 | 3 3/4 | 8 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
188AT | 4 1/2 | 3 3/4 | 9 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
189AT | 4 1/2 | 3 3/4 | 10 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
189ATC | 4 1/2 | 3 3/4 | 10 | 2 3/4 | 2 1/4 | 1 1/8 | |
1810AT | 4 1/2 | 3 3/4 | 11 | 2 3/4 | 2 1/4 | 2 | 1 1/8 |
203 | 5 | 4 | 5 1/2 | 3 1/8 | 2 1/4 | 2 | 3/4 |
204 | 5 | 4 | 6 1/4 | 3 1/8 | 2 1/4 | 2 | 3/4 |
213 | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 3 | 2 3/4 | 1 1/8 |
213AT | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
213JM | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 7/8 | ||
213JP | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 1 1/4 | ||
213T | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 3 3/8 | 3 1/8 | 1 3/8 |
213TC | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 3 3/8 | 1 3/8 | |
213TR | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 4 1/8 | 2 5/8 | 1 3/8 |
214AT | 5 1/4 | 4 1/4 | 6 1/4 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
215 | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 3 | 2 3/4 | 1 1/8 |
215AT | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
215JM | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 7/8 | ||
215JP | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 1 1/4 | ||
215T | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 3 3/8 | 3 1/8 | 1 3/8 |
215TC | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 3 3/8 | 1 3/8 | |
215TR | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 4 1/8 | 2 5/8 | 1 3/8 |
216AT | 5 1/4 | 4 1/4 | 8 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
217AT | 5 1/4 | 4 1/4 | 9 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
218AT | 5 1/4 | 4 1/4 | 10 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
219AT | 5 1/4 | 4 1/4 | 11 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
219ATC | 5 1/4 | 4 1/4 | 11 | 3 1/2 | 2 3/4 | 1 3/8 | |
2110AT | 5 1/4 | 4 1/4 | 12 1/2 | 3 1/2 | 2 3/4 | 2 1/2 | 1 3/8 |
2110ATC | 5 1/4 | 4 1/4 | 12 1/2 | 3 1/2 | 2 3/4 | 1 3/8 | |
224 | 5 1/2 | 4 1/2 | 6 3/4 | 3 1/2 | 3 | 2 3/4 | 1 |
225 | 5 1/2 | 4 1/2 | 7 1/2 | 3 1/2 | 3 | 2 3/4 | 1 |
253AT | 6 1/4 | 5 | 7 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
254 | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 3 3/8 d> | 3 1/8 | 1 1/8 |
254AT | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
254T | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 4 | 3 3/4 | 1 5/8 |
254TC | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 4 | 1 5/8 | |
254TR | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 4 1/2 | 2 7/8 | 1 5/8 |
254U | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 3 3/4 | 3 1/2 | 1 5/8 |
255AT | 6 1/4 | 5 | 9 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
256AT | 6 1/4 | 5 | 10 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
256T | 6 1/4 | 5 | 10 | 4 1/4 | 4 | 3 3/4 | 1 5/8 |
256TC | 6 1/4 | 5 | 10 | 4 1/4 | 4 | 1 5/8 | |
256TR | 6 1/4 | 5 | 10 | 4 1/4 | 4 1/2 | 2 7/8 | 1 5/8 |
256U | 6 1/4 | 5 | 10 | 4 1/4 | 3 3/4 | 3 1/2 | 1 3/8 |
257AT | 6 1/4 | 5 | 11 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
258AT | 6 1/4 | 5 | 12 1/2 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
259AT | 6 1/4 | 5 | 14 | 4 1/4 | 3 1/4 | 3 | 1 5/8 |
283AT | 7 | 5 1/2 | 8 | 4 3/4 | 3 1/4 | 3 1/2 | 1 7/8 |
284 | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 3 3/4 | 3 1/2 | 1 1/4 |
284AT | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
284T | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 4 5/8 | 4 3/8 | 1 7/8 |
284TC | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 4 5/8 | 1 7/8 | |
284TR | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 4 3/4 | 3 1/8 | 1 7/8 |
284TC | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 3 1/4 | 3 | 1 5/8 |
284U | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 4 7/8 | 4 5/8 | 1 5/8 |
285AT | 7 | 5 1/2 | 10 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
286AT | 7 | 5 1/2 | 11 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
286T | 7 | 5 1/2 | 11 | 4 3/4 | 4 5/8 | 4 3/8 | 1 7/8 |
286TC | 7 | 5 1/2 | 11 | 4 3/4 | 4 5/8 | 1 7/8 | |
286TR | 7 | 5 1/2 | 11 | 4 3/4 | 4 3/4 | 3 1/8 | 1 7/8 |
286TS | 7 | 5 1/2 | 11 | 4 3/4 | 3 1/4 | 3 | 1 7/8 |
286U | 7 | 5 1/2 | 11 | 4 3/4 | 4 7/8 | 4 5/8 | 1 7/8 |
287AT | 7 | 5 1/2 | 12 1/2 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
288AT | 7 | 5 1/2 | 14 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
289AT | 7 | 5 1/2 | 16 | 4 3/4 | 3 3/4 | 3 1/2 | 1 7/8 |
323AT | 8 | 6 1/4 | 9 | 4 3/4 | 4 1/4 | 4 | 2 1/8 |
324 | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 4 7/8 | 4 5/8 | 1 5/8 |
324AT | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
324TR | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 5 1/4 | 3 1/2 | 2 1/8 |
324TS | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 3 3/4 | 3 1/2 | 1 7/8 |
324U | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 5 5/8 | 5 3/8 | 1 7/8 |
325AT | 8 | 6 1/4 | 11 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
326 | 8 | 6 1/4 | 12 | 5 1/4 | 4 7/8 | 4 5/8 | 1 5/8 |
326AT | 8 | 6 1/4 | 12 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
326T | 8 | 6 1/4 | 12 | 5 1/4 | 5 1/4 | 5 | 2 1/8 |
326TR | 8 | 6 1/4 | 12 | 5 1/4 | 5 1/4 | 3 1/2 | 2 1/8 |
326TS | 8 | 6 1/4 | 12 | 5 1/4 | 3 3/4 | 3 1/2 | 1 7/8 |
326U | 8 | 6 1/4 | 12 | 5 1/4 | 5 5/8 | 5 3/8 | 1 7/8 |
327AT | 8 | 6 1/4 | 14 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
328AT | 8 | 6 1/4 | 16 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
329AT | 8 | 6 1/4 | 18 | 5 1/4 | 4 1/4 | 4 | 2 1/8 |
363AT | 9 | 7 | 10 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
364 | 9 | 7 | 11 1/4 | 5 7/8 | 5 5/8 | 5 3/8 | 1 7/8 |
364AT | 9 | 7 | 11 1/4 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
364S | 9 | 7 | 11 1/4 | 5 7/8 | 3 1/4 | 3 | 1 5/8 |
364T | 9 | 7 | 11 1/4 | 5 7/8 | 5 7/8 | 5 7/8 | 2 3/8 |
364TR | 9 | 7 | 11 1/4 | 5 7/8 | 5 3/4 | 3 3/4 | 2 3/8 |
364TS | 9 | 7 | 11 1/4 | 5 7/8 | 3 3/4 | 3 1/2 | 1 7/8 |
364U | 9 | 7 | 11 1/4 | 5 7/8 | 6 3/8 | 6 1/8 | 2 1/8 |
365 | 9 | 7 | 12 1/4 | 5 7/8 | 5 5/8 | 5 3/8 | 1 7/8 |
365AT | 9 | 7 | 12 1/4 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
365T | 9 | 7 | 12 1/4 | 5 7/8 | 5 7/8 | 4 7/8 | 2 3/8 |
324T | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 5 1/4 | 5 | 2 1/8 |
365TR | 9 | 7 | 12 1/4 | 5 7/8 | 5 3/4 | 3 3/4 | 2 3/8 |
365TS | 9 | 7 | 12 1/4 | 5 7/8 | 3 3/4 | 3 1/2 | 1 7/8 |
365U | 9 | 7 | 12 1/4 | 5 7/8 | 6 3/8 | 6 1/8 | 2 1/8 |
366AT | 9 | 7 | 14 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
364AT | 9 | 7 | 11 1/4 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
367AT | 9 | 7 | 16 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
368AT | 9 | 7 | 18 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |
369AT | 9 | 7 | 20 | 5 7/8 | 4 3/4 | 4 1/2 | 2 3/8 |