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Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

Taking Data on a DC Armature

  • July 2026
  • Number of views: 720
  • Article rating: No rating
FREE for Members of EASA

Are you struggling with training new technicians to take data and rewind DC armatures properly? This recording covers the critical skill gap in our industry for qualified DC armature technicians.

Introducing IEEE 2455: DC Repair Standard

IEEE Recommended Practice for the Repair and Maintenance of Direct Current Electric Machines

  • September 2025
  • Number of views: 6755
  • Article rating: 3.8

There is now a much-needed DC repair standard, created through the participation of EASA members and industry motor users.

Presentando la IEEE 2455: DC Repair Standard

IEEE Recommended Practice for the Repair and Maintenance of Direct Current Electric Machines

  • September 2025
  • Number of views: 3006
  • Article rating: No rating

Existe ahora una norma para las reparaciones de CC muy necesaria, creada gracias a la participación de miembros de EASA y usuarios de motores de la industria.

How to Measure Magnet Wire

  • March 2023
  • Number of views: 7386
  • Article rating: 5.0

This video shows one step in collecting motor winding data: how to measure magnet wire.

Factors to Consider When Testing DC Armatures

  • May 2021
  • Number of views: 21004
  • Article rating: 5.0

There are a lot of factors to take into consider when interpreting the bar-bar test or surge test. This articles reviews those factors.

Factores a Considerar al Probar Armaduras de CC

  • May 2021
  • Number of views: 20409
  • Article rating: No rating
Hay muchos factores a tener en cuenta al interpretar la prueba de barra-barra o la prueba de sobretensión. Este artículo revisa esos factores.

DC Machine Data Sheet

  • December 2020
  • Number of views: 20743
  • Article rating: 4.6

EASA's DC Machine Data Sheet provides all the fields necessary on a simple one-page form to accurately record all the details about the machine being repaired.

DC Motor Electrical Procedures

  • April 2020
  • Number of views: 16467
  • Article rating: 3.0

A special discounted collection of 6 webinar recordings focusing on DC motor electrical procedures.

Just $30 for EASA members!

Applying balance tolerances to various machine rotors

  • August 2017
  • Number of views: 14246
  • Article rating: No rating

The ISO balancing specification for rigid rotors (ISO 1940-1) was innovative when it was introduced decades ago. It established Balance Quality Grades based on the theoretical velocity the mass center of gravity of a rotor would encounter in free space, spinning at the rotor’s normal operating speed. That’s a mouthful of technical jargon, but a practical understanding of the nature of unbalance forces is important in applying balance tolerances to various machine rotors. It is also helpful in understanding the impact of fundamental changes in the recent replacement standard, 21940-11: 2016.

Aplicando las tolerancias de balanceo en rotores de diversas máquinas

  • August 2017
  • Number of views: 16727
  • Article rating: No rating

La especificación ISO para balancear rotores rígidos (ISO 1940-1) fue innovadora cuando fue introducida hace varias décadas. Esta norma estableció los Grados de Calidad de Balanceo basada en la velocidad teórica que el centro de masa de un rotor se encontraría en espacio libre, girando a la velocidad de funcionamiento normal del rotor. Esta es terminología técnica difícil de expresar, pero un entendimiento práctico de la naturaleza de las fuerzas de desbalanceo es importante para aplicar las tolerancias de balanceo en rotores de diversas máquinas. Esto también ayuda a entender el impacto de los cambios fundamentales en la reciente norma de reemplazo: 21940-11: 2016.

EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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