Electric Motor Shaft Sizes Chart

Use tables 4 6 for 1953 nema reratings u frames.

Electric motor shaft sizes chart.

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. T indicates that the motor is of the 1964 and later t frame vintage. Electrical motor shaft power electrical motors are rated in horsepower or watt. Typical examples of frame numbers 48 56 145 and 215.

Nema frame shaft sizes big electric effective 06 01 13 hydra mount elektrim motors learn how to retrofit hydra mount brochurenema frame shaft sizes big electric motorsnema frame shaft sizes big electric motorsquick reference motor dimensionsquick reference motor dimensionsmotor frame sizes dc brushed servo motors metric nema 23 34 42 56electric motor nema frame table. Also included is the shaft length and keyseat width. Dimensional data for 444t through 449ts frame sizes reflect the use of a top mounted conduit box with a cantilevered mounting arm. Use table 3 to find the shaft diameter for that motor.

For more exact dimensional data please check the specific drawing for each catalog number. 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. 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. 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.

The frame number relates to the d dimension distance from center of shaft to center bottom of mount. Dimension v is shaft length available for coupling pinion or pulley hub this is a minimum value. The above chart provides typical baldor reliance motor dimensions. Certain nema 56z frame motors have 1 2 x 1 1 2 long shaft with 3 64 flat.

These shaft diameters are based on the 1964 nema reratings. Base of 56hz frame motors has holes and slots to match nema 56 56h 143t and 145t mounting dimensions. Short shaft motors have shaft dimensions that are smaller than the shafts associated with the normal frame size. Association frame size refers to mounting only and has no direct bearing on the motor body diameter.

They are not designed for use in belt drive applications. 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. Short shaft motors are designed to be directly coupled to a load through a flexible coupling love joy etc. Electrical motors full load amps full load currents for 460 volts 230 volts and 115 volts motors single and 3 phase.

Electrical motor efficiency ratings nema electrical motor efficiency ratings. In any standard frame number designation there are either two or three numbers.