Electric Motors - IEC and NEMA Standard Torques

IEC and NEMA torque classifications of electrical motors.

Sponsored Links

NEMA (National Electrical Manufacturers Association) has classified electrical motors in four different NEMA designs where torque and starting-load inertia are important criteria.

Torques of the IEC Design N motors are in general close to NEMA Design B motors. IEC Design N and NEMA Design B are the most commonly used industrial types.

Torques of the IEC Design H are nearly identical to NEMA Design C.

IEC/NEMA Standard Torques (lb ft)
Power (hp)	2 Pole						4 Pole
Power (hp)	Locked Rotor Torque		Pull Up Torque		Break Down Torque		Locked Rotor Torque		Pull Up Torque		Break Down Torque
3	170	160	110	110	200	230	180	215	120	150	200	250
5	160	150	110	105	200	215	170	185	120	130	200	225
7.5	150	140	100	100	200	200	160	175	110	120	200	215
10	150	135	100	100	200	200	160	165	110	115	200	200
15 - 20	140	130	100	100	200	200	150	150	110	105	200	200

1 lb ft = 1.356 Nm

Related Documents

Angular Motion - Power and Torque - Angular velocity and acceleration vs. power and torque.
Centrifugal Pumps - Speed Torque Curve - Centrifugal pumps and the characteristic speed torque curve
Electric Motors - Torque vs. Power and Speed - Electric motor output power and torque vs. rotation speed.
Electrical Induction Motors - Torque vs. Speed - Full load operating torque vs. break down, pull up and locked rotor torque.
Electrical Motors - Frame Dimensions - Electrical motors NEMA frame dimensions.
Electrical Motors Efficiency Ratings - NEMA - electrical motor efficiency ratings.
IEC Electric Motor Duty Cycles - The eight - S1 - S8 - IEC duty cycles of operating electrical motors.
Improvised Torque Wrench - Improvise a torque wrench with a luggage scale.
NEMA A, B, C and D Electrical Motor Design - NEMA has established the four different designs A, B, C and D for electrical induction motors.
Torque - Work done and Power Transmitted - The work done and power transmitted by a constant torque.
Torque or Moment of Force - Online Converter - Torque or moment - the tendency of a force to rotate an object.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Electric Motors - IEC and NEMA Standard Torques

IEC and NEMA torque classifications of electrical motors.

Related Topics

Related Documents

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

Privacy

Advertise in the ToolBox

Citation

Scientific Online Calculator