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ANSI/EASA AR100-2020 cover

ANSI/EASA Standard AR100-2020
ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus is a must-have guide to the repair of rotating electrical machines. It establishes recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

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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

Vertical Motor End Play

  • August 2025
  • Number of views: 731
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AKARD COMMUTATOR of TENNESSEE (ACT)Chuck Yung
EASA Senior Technical Support Specialist

There are many bearing arrangements in vertical machines. This webinar expands on the 2023 convention paper and provides an overview of common different thrust bearing arrangements, with end play guidance tips for each.  

Topics include:  

  • Single thrust bearing
  • Multiple thrust bearings, all oriented thrust down
  • Multiple thrust bearings with one thrust-up
  • Vertical machines with lower sleeve guide bearing
  • Vertical machines with hydrodynamic thrust bearing

This recording is intended for owner-managers, shop supervisors, machinists, service center technicians, and safety directors.

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EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 8: Bearings

Related Reference and Training Materials

Mechanical Repair Fundamentals of Electric Motors
  • Section 5: Bearings

Tags: Bearings Vertical motors
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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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