Motor Dimensional Chart

NEMA Frame

D (footnote1)

2E

2F

BA

H

N-W

U

V (footnote7) Min.

Key Wide

Key Thick

42

2 5/8

3 1/2

1 1/6

2 1/16

9/32 slot

1 1/8

3/8

-

-

3/64 flat

48

3

4 1/4

2 3/4

2 1/2

11/32 slot

1 1/2

1/2

-

-

3/64 flat

48H

3

4 1/4

4 3/4

2 1/2

11/32 slot

1 1/2

1/2

-

-

3/64 flat

56

3 1/2

4 7/8

3

2 3/4

11/32 slot

1 7/8 (footnote6)

5/8 (footnote6)

-

3/16 (footnote6)

3/16 (footnote6)

56H

3 1/2

4 7/8

3 & 5 (footnote3)

2 3/4

11/32 slot

1 7/8 (footnote6)

5/8 (footnote6)

-

3/16 (footnote6)

3/16 (footnote6)

56HZ

3 1/2

(footnote2)

(footnote2)

(footnote2)

(footnote2)

2 1/4

7/8

2

3/16

3/16

66

4 1/8

5 7/8

5

3 1/8

13/32slot

2 1/4

3/4

-

3/16

3/16

143T

3 1/2

5 1/2

4

2 1/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

145T

3 1/2

5 1/2

5

2 1/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

146AT

3 1/2

5 1/2

5 1/2

2 3/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

148AT

3 1/2

5 1/2

7

2 3/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

149AT

3 1/2

5 1/2

8

2 3/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

1412AT

3 1/2

5 1/2

11

2 3/4

11/32 dia.

2 1/4

7/8

2

3/16

3/16

182

4 1/2

7 1/2

4 1/2

2 3/4

13/32 dia.

2 1/4

7/8

2

3/16

3/16

184

4 1/2

7 1/2

5 1/2

2 3/4

13/32 dia.

2 1/4

7/8

2

3/16

3/16

182T

4 1/2

7 1/2

4 1/2

2 3/4

13/32 dia.

2 3/4

1 1/8

2 1/2

1/4

1/4

184T

4 1/2

7 1/2

5 1/2

2 3/4

13/32 dia.

2 3/4

1 1/8

2 1/2

1/4

1/4

182AT

4 1/2

7 1/2

4 1/2

2 3/4

13/32 dia.

2 1/4

1 1/8

2

1/4

1/4

L182ACY

4 1/2

7 1/2

4 1/2

2 3/4

13/32 dia.

2 1/4

7/8

2

3/16

3/16

L182AT

4 1/2

7 1/2

4 1/2

2 3/4

13/32 dia.

2 1/4

1 1/8

2

1/4

1/4

186ACY

4 1/2

7 1/2

7

2 3/4

13/32 dia.

2 1/4

7/8

2

3/16

3/16

186AT

4 1/2

7 1/2

7

2 3/4

13/32 dia.

2 1/4

1 1/8

2

1/4

1/4

L186AT

4 1/2

7 1/2

7

2 3/4

13/32 dia.

2 1/4

1 1/8

2

1/4

1/4

189AT

4 1/2

7 1/2

10

2 3/4

13/32 dia.

2 1/4

1 1/8

2

1/4

1/4

203 (footnote5)

5

8

5 1/2

3 1/8

13/32 dia.

2 1/4

3/4

2

3/16

3/16

204 (footnote5)

5

8

6 1/2

3 1/8

13/32 dia.

2 1/4

3/4

2

3/16

3/16

213

5 1/4

8 1/2

5 1/2

3 1/2

13/32 dia.

3

1 1/8

2 3/4

1/4

1/4

215

5 1/4

8 1/2

7

3 1/2

13/32 dia.

3

1 1/8

2 3/4

1/4

1/4

213T

5 1/4

8 1/2

5 1/2

3 1/2

13/32 dia.

3 3/8

1 3/8

3 1/8

5/16

5/16

215T

5 1/4

8 1/2

7

3 1/2

13/32 dia.

3 3/8

1 3/8

3 1/8

5/16

5/16

219AT

5 1/4

8 1/2

11

3 1/2

13/32 dia.

2 3/4

1 3/8

2 1/2

5/16

5/16

2110AT

5 1/4

8 1/2

12 1/2

3 1/2

13/32 dia.

2 3/4

1 3/8

2 1/2

5/16

5/16

224 (footnote5)

5 1/4

9

6 3/4

3 1/2

13/32 dia.

3

1

2 3/4

1/4

1/4

225 (footnote5)

5 1/4

9

7 1/2

3 1/2

13/32 dia.

3

1

2 3/4

1/4

1/4

254 (footnote5)

6 1/4

10

8 1/4

4 1/4

21/32 dia.

3 3/8

1 1/8

3 1/8

1/4

1/4

254U

6 1/4

10

8 1/4

4 1/4

17/32 dia.

3 3/4

1 3/8

3 1/2

5/16

5/16

256U

6 1/4

10

10

4 1/4

17/32 dia.

3 3/4

1 3/8

3 1/2

5/16

5/16

254T

6 1/4

10

8 1/4

4 1/4

17/32 dia.

4

1 5/8

3 3/4

3/8

3/8

256T

6 1/4

10

10

4 1/4

17/32 dia.

4

1 5/8

3 3/4

3/8

3/8

284 (footnote5)

7

11

9 1/2

4 3/4

21/32 dia.

3 3/4

1 1/4

3 1/2

1/4

1/4

284U

7

11

9 1/2

4 3/4

17/32 dia.

4 7/8

1 5/8

4 5/8

3/8

3/8

286U

7

11

11

4 3/4

17/32 dia.

4 7/8

1 5/8

4 5/8

3/8

3/8

284T

7

11

9 1/2

4 3/4

17/32 dia.

4 5/8

1 7/8

4 3/8

1/2

1/2

286T

7

11

11

4 3/4

17/32 dia.

4 5/8

1 7/8

4 3/8

1/2

1/2

284TS

7

11

9 1/2

4 3/4

17/32 dia.

3.25 (footnote4)

3 (footnote4)

3 (footnote4)

3/8

3/8

286TS

7

11

11

4 3/4

17/32 dia.

3.25 (footnote4)

3 (footnote4)

3 (footnote4)

3/8

3/8

324 (footnote5)

8

12 1/2

10 1/2

5 1/4

21/32 dia.

4 7/8

4 5/8

4 5/8

3/8

3/8

326 (footnote5)

8

12 1/2

12

5 1/4

21/32 dia.

4 7/8

4 5/8

4 5/8

3/8

3/8

324U

8

12 1/2

10 1/2

5 1/4

21/32 dia.

5 5/8

5 3/8

5 3/8

1/2

1/2

326U

8

12 1/2

12

5 1/4

21/32 dia.

5 1/4

5 3/8

5 3/8

1/2

1/2

324T

8

12 1/2

10 1/2

5 1/4

21/32 dia.

5 1/4

5

5

1/2

1/2

326T

8

12 1/2

12

5 1/4

21/32 dia.

5 1/4

5

5

1/2

1/2

324TS

8

12 1/2

10 1/2

5 1/4

21/32 dia.

3.75 (footnote4)

3.5 (footnote4)

3.5 (footnote4)

1/2

1/2

326TS

8

12 1/2

12

5 1/4

21/32 dia.

3.75 (footnote4)

3.5 (footnote4)

3.5 (footnote4)

1/2

1/2

364 (footnote5)

9

14

11 1/4

5 7/8

21/32 dia.

5 5/8

5 3/8

5 3/8

1/2

1/2

364S (footnote5)

9

14

11 1/4

5 7/8

21/32 dia.

3 1/4

3

3

3/8

3/8

365 (footnote5)

9

14

12 1/2

5 7/8

21/32 dia.

5 5/8

5 3/8

5 3/8

1/2

1/2

364U

9

14

11 1/4

5 7/8

21/32 dia.

6 3/8

6 1/8

6 1/8

1/2

1/2

365U

9

14

12 1/2

5 7/8

21/32 dia.

6 3/8

6 1/8

6 1/8

1/2

1/2

364T

9

14

11 1/4

5 7/8

21/32 dia.

5 7/8

2 3/8

5 7/8

5/8

5/8

365T

9

14

12 1/4

5 7/8

21/32 dia.

5 7/8

2 3/8

5 7/8

5/8

5/8

364TS

9

14

11 1/4

5 7/8

21/32 dia.

3 3/4 (footnote4)

1 7/8 (footnote4)

3 1/2 (footnote4)

1/2

1/2

365TS

9

14

12 1/4

5 7/8

21/32 dia.

3 3/4 (footnote4)

1 7/8 (footnote4)

3 1/2 (footnote4)

1/2

1/2

404T

10

16

12 1/4

6 5/8

13/16 dia.

7 1/4

2 7/8

7

3/4

3/4

405T

10

16

13 3/4

6 5/8

13/16 dia.

7 1/4

2 7/8

7

3/4

3/4

404TS

10

16

12 1/4

6 5/8

13/16 dia.

4 1/4 (footnote4)

2 1/8 (footnote4)

4 (footnote4)

1/2

1/2

405TS

10

16

13 3/4

6 5/8

13/16 dia.

4 1/4 (footnote4)

2 1/8 (footnote4)

4 (footnote4)

1/2

1/2

404U

10

16

12 1/4

6 5/8

13/16 dia.

7 1/8

2 3/8

6 7/8

5/8

5/8

405U

10

16

13 3/4

6 5/8

13/16 dia.

7 1/8

2 3/8

6 7/8

5/8

5/8

444T

11

18

14 1/2

7 1/2

13/16 dia.

8 1/2

3 3/8

8 1/4

7/8

7/8

445T,447T (footnote8)

11

18

16 1/2

7 1/2

13/16 dia.

8 1/2

3 3/8

8 1/4

7/8

7/8

444TS, 447TS (footnote8)

11

18

14 1/2

7 1/2

13/16 dia.

4 3/4 (footnote4)

2 3/8 (footnote4)

4 1/2 (footnote4)

5/8

5/8

445TS

11

18

16 1/2

7 1/2

13/16 dia.

4 3/4 (footnote4)

2 3/8 (footnote4)

4 1/2 (footnote4)

5/8

5/8

444U

11

18

14 1/2

7 1/2

13/16 dia.

8 5/8

2 7/8

8 3/8

3/4

3/4

445U

11

18

16 1/2

7 1/2

13/16 dia.

8 5/8

2 7/8

8 3/8

3/4

3/4

449T

11

18

25

7 1/2

13/16 dia.

8 1/2

3 3/8

8 1/4

7/8

7/8

449TS

11

18

25

7 1/2

13/16 dia.

4 3/4 (footnote4)

2 3/8 (footnote4)

4 1/2 (footnote4)

5/8

5/8

footnotes:

• 1. Dimension "D" will never be greater than the above values on rigid mount motors, but it may be less so that shims up to 1/32inch thick (1/16inch on 364U and 365U frames) may be required for certain machines.
• 2. Based of Dayton 56HZ frame motors has holes and slots to match NEMA 56, 56H, 143T and 145T mounting dimensions.
• 3. Dayton motors designated 56H have two sets of 2F mounting holes --3inch and 5inch.
• 4. Standard short shaft for direct-drive applications.
• 5. Discontinued NEMA frame.
• 6. Certain NEMA 56Z frame motors have 1/2inch dia. x 1 1/2inch long shaft with 3/64inch flat.
• 7. Dimension "V" is shaft length available for coupling, pinion or pulley hub--this is a minimum value.
• 8. The 2F dimension is 20.