Electrical motor shaft power electrical motors are rated in horsepower or watt.
Electric motor shaft sizes chart.
Drawings represent standard tefc general purpose motors refer data section 502 for various models open or tefc d im e ns oa rf c ly.
Use table 3 to find the shaft diameter for that motor.
Dimension v is shaft length available for coupling pinion or pulley hub this is a minimum value.
Use tables 4 6 for 1953 nema reratings u frames.
T indicates that the motor is of the 1964 and later t frame vintage.
Dimensional data for 444t through 449ts frame sizes reflect the use of a top mounted conduit box with a cantilevered mounting arm.
Refer to table 1 for open motors or table 2 for totally enclosed fan cooled motors tefc to find a frame size based on motor hp.
For more exact dimensional data please check the specific drawing for each catalog number.
Also included is the shaft length and keyseat width.
Association frame size refers to mounting only and has no direct bearing on the motor body diameter.
Typical examples of frame numbers 48 56 145 and 215.
Short shaft motors have shaft dimensions that are smaller than the shafts associated with the normal frame size.
They are not designed for use in belt drive applications.
These shaft diameters are based on the 1964 nema reratings.
In any standard frame number designation there are either two or three numbers.
Short shaft motors are designed to be directly coupled to a load through a flexible coupling love joy etc.
Electrical motor efficiency ratings nema electrical motor efficiency ratings.
The frame number relates to the d dimension distance from center of shaft to center bottom of mount.
These exceptions are noted in the general catalog.
Leader in energy efficient industrial electric motors and drives nemakeyseat nemakeyseat shaft dimensionsshaft 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.
Electrical motors full load amps full load currents for 460 volts 230 volts and 115 volts motors single and 3 phase.
T h e s e d i m en s i o n s a r e s p e c i f i c t o e a c h m anu f a c t u r e r.
Base of 56hz frame motors has holes and slots to match nema 56 56h 143t and 145t mounting dimensions.
Nema shaft u k ey r dim n s 3 8 1 2 5 8 7 8 1 1 8 1 3 8 1 5 8 1 7 8 2 1 8 2 3 8 2 1 2 2 7 8 3 3 8 3 7 8 21 64 29 64 33.
The above chart provides typical baldor reliance motor dimensions.
Nema motor dimensions reference chart a ft e r l e t t e r i n d i c a t e s t h e n u m b e r i s a n app r o x i m a te v a l ue.
