56C, 56J, and Square Flange Mechanical Dimensions
Features
Drip-proof, Totally Enclosed Fan Cooled and Explosion Proof. All dimensions are approximate and 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: 56H Combination Foot (56 & 143T/145T)
Diagram showing a 56H Combination Foot mounting configuration. Key dimensions include:
- Overall height: 5.00 inches (Ref)
- Overall width: 6.50 inches
- Mounting height: 4.00 inches (Ref)
- Mounting height: 3.00 inches (Ref)
- Base dimensions: 2.75 inches by 2.75 inches
Suffix "Y" indicates Special Mount Dimensions. Suffix "Z" indicates Special Shaft Dimensions.
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 |
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 |
Diagrams for 56J and 56C Motors
56J Motor Dimensions
Side view of a 56J motor. Key dimensions:
- Shaft end dimension: 1-7/8 inches
- Shaft dimension: 11/16 inches
- Shaft dimension: 5/32 inches
- Shaft keyway dimension: 1/8 inches
- Thread Pitch: 7/16, 20UNF, 2A
- Diameter: 3995/4037 inches
- Max. Depth of Screw in Casting: 4.500" - 4.497"
56J, 56C (FACE) Motor Dimensions
Face view of 56J and 56C motors. Features include:
- Mounting bolt circle diameter: 5.875 inches
- Mounting hole size: 4 mounting holes 3/8-16 UNC 2B
- Maximum depth of screw in casting: 5/8 inches
- Angles indicated: 45 degrees
56C Motor Dimensions
Side view of a 56C motor. Key dimensions:
- Shaft end dimension: 2-1/16 inches
- Keyway size: 3/16 inches
- Shaft diameter: .6245" / .6250"
This view is labeled as Diagram 2.
Diagram 3: Square Flange Motor Dimensions
Detailed view of a Square Flange motor mounting configuration. Key features and dimensions:
- Mounting dimensions: AG, BX, BC
- Radial dimension: 10" R.
- Bore diameter: 6-1/2 inches DIA. BORE
- Shaft dimension: 6-5/64 inches
- Radial dimension: 2-9/16 R.
- Shaft diameter: 5.750 / 5.752 inches
- Bolt circle diameter: 7.125 DIA. B.C.
- Pipe thread: 1/2-14 STRAIGHT PIPE THD.
- Thread specification: 1/2-20UNF-2A THD.
- Left-hand thread: 1/4-20UNC-2B L.H. THD. 1/2 DEEP
- Tenon pads & box faces are square with shaft L within .004 T.I.R.
- Concentricity of bore with shaft is within .003 T.I.R.
- Hole specification: 13/32 DIA. (4) HOLES, EQUALLY SPACED AS SHOWN
