The shaft size of a 56 frame motor is 5/8 inch (0.625 inches) in diameter.
Understanding 56 Frame Motors
56 frame motors are a common type of electric motor used in a variety of applications. The "56" designation refers to the NEMA (National Electrical Manufacturers Association) frame size, which dictates certain physical dimensions of the motor, including the shaft diameter.
Key Dimensions of 56 Frame Motors
While the shaft diameter is a key characteristic, other dimensions are also standardized:
- Shaft Diameter: 5/8 inch (0.625 inches)
- Distance from Rotor Shaft Centerline to Underside of Motor Feet: 3 ½ inches.
Variations: 56C and 56J
You might encounter variations like 56C and 56J. These designations indicate different mounting configurations:
- 56C: "C-face" mounting, meaning it has a specific flange with tapped holes for direct mounting to a gearbox or other equipment. The shaft diameter remains 5/8 inch.
- 56J: "JM" or "JP" mounting. Again, the shaft diameter remains 5/8 inch. The difference is the dimensions of the flange itself.
Importance of Standardized Dimensions
The standardization of frame sizes, including the shaft diameter, is crucial for:
- Interchangeability: Allows for easy replacement of motors from different manufacturers.
- Compatibility: Ensures that the motor will properly fit and function with compatible equipment.
- Design: Simplifies the design process for equipment that uses electric motors.
