Overview
Engineering reference data for IEC Nema Standards Torques in standard organizations.
Key Formulas
ISO Standard
Quality management systems.
ASTM Standard
Standard test methods for tension testing.
ANSI Standard
Pipe flanges and flanged fittings.
Variables
| Symbol | Description | Unit |
|---|---|---|
| International Organization for Standardization | — | |
| American Society for Testing and Materials | — | |
| American National Standards Institute | — |
Motor Design Classifications
The extracted data compares IEC and NEMA standard motor designs, noting that IEC Design N motors are generally similar to NEMA Design B, while IEC Design H motors are nearly identical to NEMA Design C. These are the most commonly used industrial motor types where starting torque and inertia are critical design factors.
Standard Torque Data
The following table lists typical torque values (as a percentage of full-load torque) for standard NEMA Design B / IEC Design N motors.
Unit Conversion
A key conversion factor provided in the source data for working with these torque values is:
This is essential for converting the torque percentages from lb·ft to SI units (N·m) when applying them to a specific motor's full-load torque rating.