Nema Quick Reference Chart
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1NEMA
Keyseat
NEMA
Keyseat
Shaft
Dimensions
Shaft
Dimensions
(U)
(R)
(S)
(U)
(R)
(S)
3/8
21/64
FLAT
1-7/8
1-19/32
1/2
1/2
29/64
FLAT
2-1/8
1-27/32
1/2
Leader in Energy Efficient
Leader in Energy Efficient
5/8
33/64
3/16
2-3/8
2-1/64
5/8
Industrial Electric Motors and Drives
Industrial Electric Motors and Drives
7/8
49/64
3/16
2-1/2
2-3/16
5/8
1-1/8
63/64
1/4
2-7/8
2-29/64
3/4
1-3/8
1-13/64
5/16
3-3/8
2-7/8
7/8
1-5/8
1-13/32
3/8
3-7/8
3-5/16
1
C*
P
AH (56-184)
AB
SINGLE PHASE
BB
AH (213-449)
ONLY
V
45˚
45˚
AJ
XO
THERMAL
NAMEPLATE
(WHEN REQ'D)
O
AK BD
TAP
U
D
4 HOLES
REMOVABLE
E
E
DRIP COVER
BA
2F
AA = CONDUIT SIZE
H = Hole
(OPTIONAL)
C*
P
AB
N
V
Drawings represent standard TEFC general purpose motors
O
Refer Data Section 502 for various models, OPEN or TEFC
U
*Dimensions are for reference only.
D
E
E
2F
AA
BA
H = Hole
*Contact your local Baldor office for “C” Dimensions.
Dimensions - N, O, P, AB and XO are specific to Baldor.
NEMA QUICK REFERENCE CHART
N EMA
FRAME
D
E
2F
H
N
O
P
U
V
AA
AB
AH
AJ
AK
BA
BB
BD
XO
TAP
42
2-5/8
1-3/4
1-11/16
9/32
1-1/2
5
4-11/16
3/8
1-1/8
3/8
4-1/32
1-5/16
3-3/4
3
2-1/16
1/8
4-5/8
1-9/16
1/4-20
SLOT
48
3
2-1/8
2-3/4
11/32
1-7/8
5-7/8
5-11/16
1/2
1-1/2
1/2
4-3/8
1-11/16
3-3/4
3
2-1/2
1/8
5-5/8
2-1/4
1/4-20
SLOT
56
3-1/2
2-7/16
3
11/32
2-7/16
6-7/8
6-5/8
5/8
1-7/8
1/2
5
2-1/16
5-7/8
4-1/2
2-3/4
1/8
6-1/2
2-1/4
3/8-16
56H
5
SLOT
2-1/8
143T
3-1/2
2-3/4
4
11/32
2-1/2
6-7/8
6-5/8
7/8
2-1/4
3/4
5-1/4
2-1/8
5-7/8
4-1/2
2-1/4
1/8
6-1/2
2-1/4
3/8-16
145T
5
182
4-1/2
2-11/16
7
/8
2-1/4
2-1/8
5-7/8
4-1/2
1/8
6-1/2
3/8-16
184
4-1/2
3-3/4
5-1/2
13/32
2-11/16
8-11/16
7-7/8
7/8
2-1/4
3/4
5-7/8
2-1/8
5-7/8
4-1/2
2-3/4
1/8
6-1/2
2-3/8
3/8-16
182T
4-1/2
3-9/16
1-1/8
2-3/4
2-5/8
7-1/4
8-1/2
1/4
9
1/2-13
184T
5-1/2
3-9/16
1-1/8
2-3/4
2-5/8
7-1/4
8-1/2
1/4
9
1/2-13
213
5-1/2
3-1/2
1-1/8
3
2
-3/4
215
5-1/4
4-1/4
7
13/32
3-1/2
10-1/4
9-9/16
1-1/8
3
3/4
7-3/8
2-3/4
7-1/4
8-1/2
3-1/2
1/4
9
2-3/4
1/2-13
213T
5-1/2
3-7/8
1-3/8
3-3/8
3-1/8
215T
7
3-7/8
1-3/8
3-3/8
3-1/8
254U
8-1/4
4-1/16
1-3/8
3-3/4
3-1/2
256U
6-1/4
5
10
17/32
4-1/16
12-7/8
12-15/16
1-3/8
3-3/4
1
9-5/8
3-1/2
7-1/4
8-1/2
4-1/4
1/4
10
—
1/2-13
254T
8-1/4
4-5/16
1-5/8
4
3
-3/4
256T
10
4-5/16
1-5/8
4
3
-3/4
284U
9-1/2
5-1/8
1-5/8
4-7/8
4-5/8
286U
11
5-1/8
1-5/8
4-7/8
4-5/8
284T
7
5-1/2
9-1/2
17/32
4-7/8
14-5/8
14-5/8
1-7/8
4-5/8
1-1/2
13-1/8
4-3/8
9
10-1/2
4-3/4
1/4
11-1/4
—
1/2-13
286T
11
4-7/8
1-7/8
4-5/8
4-3/8
284TS
9-1/2
3-3/8
1-5/8
3-1/4
3
286TS
11
3-3/8
1-5/8
3-1/4
3
324U
10-1/2
5-7/8
1-7/8
5-5/8
5-3/8
326U
12
5-7/8
1-7/8
5-5/8
5-3/8
324T
8
6-1/4
10-1/2
21/32
5-1/2
16-1/2
16-1/2
2-1/8
5-1/4
2
14-1/8
5
11
12-1/2
5-1/4
1/4
13-3/8
—
5/8-11
326T
12
5-1/2
2-1/8
5-1/4
5
324TS
10-1/2
3-15/16
1-7/8
3-3/4
3-1/2
326TS
12
3-15/16
1-7/8
3-3/4
3-1/2
364U
11-1/4
6-3/4
2-1/8
6-3/8
6-1/8
365U
12-1/4
6-3/4
2-1/8
6-3/8
6-1/8
364T
9
7
11-1/4
21/32
6-1/4
18-1/2
18-1/4
2-3/8
5-7/8
2-1/2
15-1/16
5-5/8
11
12-1/2
5-7/8
1/4
13-3/8
—
5/8-11
365T
12-1/4
6-1/4
2-3/8
5-7/8
5-5/8
364TS
11-1/4
4
1-7/8
3-3/4
3-1/2
365TS
12-1/4
4
1-7/8
3-3/4
3-1/2
404U
12-1/4
7-3/16
2-3/8
7-1/8
6-7/8
405U
13-3/4
7-3/16
2-3/8
7-1/8
6-7/8
404T
10
8
12-1/4
13/16
7-5/16
20-5/16
20-1/8
2-7/8
7-1/4
3
18
7
11
12-1/2
6-5/8
1/4
13-7/8
—
5/8-11
405T
13-3/4
7-5/16
2-7/8
7-1/4
7
404TS
12-1/4
4-1/2
2-1/8
4-1/4
4
405TS
13-3/4
4-1/2
2-1/8
4-1/4
4
444U
14-1/2
8-5/8
22-7/8
22-3/8
2-7/8
8-5/8
19-9/16
8-3/8
445U
16-1/2
8-5/8
22-7/8
22-3/8
2-7/8
8-5/8
19-9/16
8-3/8
444T
14-1/2
8-1/2
22-7/8
22-3/8
3-3/8
8-1/2
19-9/16
8-1/4
445T
16-1/2
8-1/2
22-7/8
22-3/8
3-3/8
8-1/2
19-9/16
8-1/4
447T
11
9
20
13/16
8-15/16
22-15/16
23-3/4
3-3/8
8-1/2
3
21-11/16
8-1/4
14
16
7-1/2
1/4
16-3/4
—
5/8-11
449T
25
8-15/16
22-15/16
23-3/4
3-3/8
8-1/2
21-11/16
8-1/4
444TS
14-1/2
5-3/16
22-7/8
22-3/8
2-3/8
4-3/4
19-9/16
4-1/2
445TS
16-1/2
5-3/16
22-7/8
22-3/8
2-3/8
4-3/4
19-9/16
4-1/2
447TS
20
4-15/16
22-15/16
23-3/4
2-3/8
4-3/4
4NPT
21-11/16
4-1/2
449TS
25
4-15/16
22-15/16
23-3/4
2-3/8
4-3/4
4NPT
21-11/16
4-1/2
NEMA FRAMES PRIOR TO 1953
NEMA C-Face
BA Dimensions
5000
Frame
D
E
F
N
U
V
BA
143-5TC
2-3/4
66
4-1/8 2-15/16 2-1/2
2-1/4
3/4
2-1/4 3-1/8
FRAME
D
E
2F
H
O
P
U
V
AA
AB
BA
203
5
4
2-3/4 2-7/16
3/4
2
3-1/8
182-4TC
3-1/2
204
3-1/4
224
5-1/2
4-1/2
3-3/8
3-1/4
1
3
3-1/2
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
213-5TC
4-1/4
225
3-3/4
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
254
6-1/4
5
4-1/8 3-7/16 1-1/8 3-3/8 4-1/4
254-6TC
4-3/4
284
7
5-1/2
4-3/4
4-1/4
1-1/4 3-3/4 4-3/4
324
8
6-1/4
5-1/4
5-3/8
1-5/8 4-7/8 5-1/4
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
326
6
364
9
7
5-5/8
5-5/8 1-78/8 5-3/8 5-7/8
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
365
6-1/8
404
10
8
6-1/8
6-3/8
2-1/8 6-1/8 6-5/8
BALDOR ELECTRIC COMPANY
405
6-7/8
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
P.O. BOX 2400
444
11
9
7-1/4
7-1/8
2-3/8 6-7/8 7-1/2
445
8-1/4
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
FORT SMITH, ARKANSAS
504
12-1/2
10
8
8-5/8
2-7/8 8-3/8 8-1/2
72902-2400 U.S.A.
505
9
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