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Proper Repair/Rewind Practices Maintain Efficiency/Reliability of Premium Efficiency/IE3 Motors  DOWNLOAD THE EXECUTIVE SUMMARY

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Fitting Sleeve Bearings

  • August 2020
  • Number of views: 158
  • Article rating: No rating
Article

When sleeve bearings are rebabbitted or replaced, an important step during assembly is to check the contact between the sleeve bearing and the journal which rides in it. The use of self-aligning sleeve bearings (also called spherical or ball fit) renders this step almost unnecessary. Still, cylindrical sleeve bearings should be inspected to make sure the contact area is sufficient. This article is specific to checking and correcting the wear pattern when installing a new sleeve bearing in an electric motor.

Ajuste de Los Cojinetes de Deslizamiento

  • August 2020
  • Number of views: 132
  • Article rating: No rating
Article

Cuando se rebabitan o se reemplazan cojinetes de deslizamiento, un paso importante durante el montaje consiste en verificar el contacto entre el cojinete y el muñón del eje que monta sobre el. El uso de cojinetes de deslizamiento auto alineables (también denominados esféricos o de ajuste esférico) hace que este paso sea casi innecesario. Aun así, los cojinetes de deslizamiento cilíndricos se deben inspeccionar para verificar que haya suficiente área de contacto. Este es un artículo específico para verificar y corregir el patrón de desgaste al momento de instalar cojinetes nuevos en un motor eléctrico.

Limiting end float of a sleeve bearing machine

  • April 2019
  • Number of views: 877
  • Article rating: No rating
Article

There are applications where the end float inherent to a sleeve bearing machine is not desirable, and some means of limiting the axial movement is needed. This is usually accomplished by selecting an appropriate coupling and relying on the driven equipment to prevent axial movement of the motor shaft. 

The gear-hub style of coupling can be end-float limited by installing a “hockey-puck” spacer. The grid-style coupling can be limited by spacers inserted on both sides. 

Regardless of coupling style, unless the driven equipment has some internal means to limit end float, there are circumstances where some external means of preventing axial movement is needed.

Sleeve bearing clearance depends on many factors

  • June 2016
  • Number of views: 930
  • Article rating: No rating
Trade press article — Plant Engineering

“What’s the proper clearance between a shaft and the sleeve bearing it rides in?” Chances are each of us has a rule of thumb for this, probably related to shaft diameter.

Sleeve bearing clearance depends on many factors

  • August 2005
  • Number of views: 1440
  • Article rating: 5.0
Article

Member question: Can you settle a disagreement about the subject of sleeve bearing clearance? We have several contradictory guidelines, some of them from manufacturers. Which is best?

It is fair to say that our outlook on life is colored by experiences. In our industry, those experiences often are shaped by the customers we serve. A good example is this question about the proper clearance between a shaft and the sleeve bearing it rides in. Chances are each of us has a rule of thumb for bearing clearance, probably related to shaft diameter. They can't all be right, yet many of us may have used one of these rules (probably not the same one, either!) with great success. Which one, if any, is correct? The answer depends on the application.

Start with cause of oil leaks in repair process on sleeve bearing motors

  • July 2000
  • Number of views: 1209
  • Article rating: 4.5
Article

Have you ever repaired a sleeve bearing motor, only to have the customer complain that it leaks oil? Perhaps the motor had a history of oil leaks, and the windings were oil-saturated when you dismantled it. Two-pole machines are especially notorious as chronic oil leakers. The first step toward correcting an oil leak is to identify the cause. 

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.

This booklet covers topics such as:

  • Installation, startup and baseline information
  • Operational monitoring and maintenance
  • Motor and baseline installation data
  • How to read a motor nameplate
  • Motor storage recommendations

LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR

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EASA Technical Manual

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The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.

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ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

Recommended Practice for the Repair of Rotating Electrical Apparatus
This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

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EASA AR200

EASA AR200: Guide for the Repair of Power and Distribution Transformers cover

Guide for the Repair of Power and Distribution Transformers
This document establishes guidelines for each step of the repair of power transformers, describing record keeping, tests, analysis, and general guidelines for the repair of power transformers.

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