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Tyler Voss Membership & Communications Specialist+1 314 993 2220tvoss@easa.com
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Gary Braun Brehob Corp. Indianapolis, Indiana Technical Education Committee Member
When servicing DC motors, one of the many tests we do to determine the condition of the commutator is to check it for loose bars.
We check for loose bars by lightly tapping the face of the commutator with a very small hammer. Then we check for suspicious sounds and movement or vibration of the bars as they’re struck. A loose bar will have a dull thud while tight bars will have more of a crisp “peck.” You should not feel any movement of the bar with respect to adjacent bars.
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This 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:
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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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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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Revised May 2024 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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