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Mechanical Dimensions
6.50
2.75
2.75
3.00
Ref.
Dimensions
Drip-proof, Totally Enclosed Fan Cooled and
Explosion Proof. All dimensions are approxi-
mate, not to be used for construction purposes.
Note: Drawing shows rigid base. Foot mounting
dimensions listed are identical for either rigid or
resilient base mounting. For 56H Combination
Foot, refer to Diagram 1. For C Flange motors,
refer to Diagram 2.
Diagram 1
Suffix “Y” = Special Mount Dim.
Suffix “Z” = Special Shaft Dim.
Diagram 2
56H Combination Foot
Common to All Squirrel Cage Motors
Frame D E F BA U N-W Key Size
42 2-5/8 1-3/4 27/32 2-1/16 3/8 1-1/8
.05 Flat
48
3 2-1/8 1-3/8 2-1/2 1/2 1-5/8
.05 Flat
56 3-1/2 2-7/16 1-1/2 2-3/4 5/8 1-7/8 3/16 sq. x 1-3/8
56H 3-1/2 Dia. 1 Dia. 1 2-3/4 5/8 1-7/8 3/16 sq. x 1-3/8
56C See Diagram 2
5/8 1-7/8 3/16 sq. x 1-3/8
56J See Diagram 2
5/8 2-7/16
Threaded
143T 3-1/2 2-3/4 2 2-1/4 7/8 2-1/4 3/16 sq. x 1-3/8
145T 3-1/2 2-3/4 2-1/2 2-1/4 7/8 2-1/4 3/16 sq. x 1-3/8
Diagram 3
SQUARE FLANGE
Features
56J
Conversion Chart
Decimal
Fraction
0.0313
1/32
0.0625
1/16
0.0938
3/32
0.1250
1/8
0.1563
5/32
0.1875
3/16
0.2188
7/32
0.2500
1/4
0.2813
9/32
0.3125
5/16
0.3438
11/32
0.3750
3/8
0.4063
13/32
0.4375
7/16
0.4688
15/32
0.5000
1/2
0.5313
17/32
0.5625
9/16
0.5938
19/32
0.6250
5/8
0.6563
21/32
0.6875
11/16
0.7188
23/32
0.7500
3/4
0.7813
25/32
0.8125
13/16
0.8438
27/32
0.8750
7/8
0.9063
29/32
0.9375
15/16
0.9688
31/32
56C (FACE)
56C
5.00
Ref.
45˚
45˚
5.875” Dia.
B.C.
4 Mounting Holes 3/8-16, UNC 2B,
Max. Depth of Screw in Casting: 5/8”
Keyed
.6245”
.6250”
3/16”
Keyway
2-1/16”
1-7/8”
11/16”
1/8
5/32”
4.500”
4.497”
Thd-Pitch: 7/16, 20UNF, 2A
Dia: 3995/4037”
.6245”
.6250”
7.125 DIA. B.C.
TENON PADS
& BOX FACES
SQUARE WITH
SHAFT L WITHIN
.004 T.I.R.
1/2-2OUNF-2A THD.
.4619/.4662 PITCH DIA.
1/2-14 STRAIGHT PIPE THD.
9/16
BX
6-5/64
1/4-2OUNC-2B L.H. THD. 1/2 DEEP
13/32 DIA. (4) HOLES, EQUALLY
SPACED AS SHOWN
45˚
6-1/2
10”R.
1/2
BC
.6245
.6250
5.750
5.752
2-9/16R
DIA. BORE
CONCENTRICITY OF
BORE WITH SHAFT
WITHIN .003 T.I.R.
45˚
AG
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