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Eddy-Current Clutches and Fluid Couplings

  • November 2020
  • Number of views: 1835
  • Article rating: No rating
FREE for Members of EASA
Webinar recording

This webinar recording explains how each of these devices work, with repair tips and application information for each.

Clearance and interference coupling fits: Tips on when to use and how to determine tolerances

  • July 2009
  • Number of views: 2502
  • Article rating: 4.0

Couplings for connecting shafts can be placed in two categories: keyed and keyless. Similarly, the fits of couplings to shafts can be categorized as clearance or interference. A keyless coupling arrangement will always have an interference fit, while a keyed arrangement may have either a clearance or an interference fit. This article will focus on determining when to use a clearance or an interference fit, and how to obtain the tolerances for the resulting fit.

Pitfalls of applying generally accepted coupling manufacturers' alignment tolerances

  • February 2005
  • Number of views: 1866
  • Article rating: No rating

Shaft couplings are devices that connect two rotating shafts together. They efficiently transfer motion and power from the drive unit to the driven unit without adversely impacting either piece of rotating equipment. Under ideal conditions, both shafts should function as a continuous unit. The design of a flexible coupling is to accommodate small amounts of shaft misalignment. Coupling manufacturers have designed their couplings to withstand the forces resulting from excessive shaft misalignment. Unfortunately, shaft alignment tolerances have sometimes been governed by the coupling manufacturers' design specifications.

Shaft couplings: Types and applications

  • June 2002
  • Number of views: 1460
  • Article rating: No rating

Shaft couplings are devices that connect two rotating shafts together. Although shaft couplings come in many shapes and configurations, they basically fall into one of two major categories: rigid (or solid) and flexible couplings. This article examines those types in more detail.

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



EASA/AEMT Rewind Study

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.


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.



EASA Technical Manual

EASA Technical Manual cover

Revised May 2021
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.