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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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

Understand vertical motor bearings

Vertical motors differ from horizontal units in various ways, including their oil-leak risks

April 2018
Number of views: 17229
Article rating: 5.0

By Jim Bryan
EASA Technical Support Specialist (retired)

Bearing construction is a key difference between vertical motors and horizontal motors that are mounted vertically. Vertical motors typically drive pumps using thrust bearings. Horizontal motors rarely have those types of bearings. Understanding relevant construction and configuration factors is crucial when confronting lubrication-related issues that can be associated with vertical-motor bearings.

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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

Principles of Medium & Large AC Motors (NEMA Standards)

Section 10: Bearings & Lubrication

Principles of Medium & Large AC Motors (IEC Standards)

Section 10: Bearings & Lubrication

Mechanical Repair Fundamentals of Electric Motors

Section 1: Motor Nomenclature
Section 5: Bearings
Section 9: Motor Assembly

Categories: Bearings, Articles in industry publications, Efficient Plant

Tags: Bearings Vertical motors Lubrication

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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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