The Sleeve Bearing Problem A machinist had pressed a new prelubricated, porous sintered bronze bearing in an electric motor. The rotor shaft would not fit into the searing. Measuring the bore, the machinist discovered that it was a few thousandths of an inch undersized. He removed it, put it in a lathe, and bored out the excess material. The bearing was pressed in again, the motor assembled, and put into use. A few days later the motor was back in the shop with the bearing burned out. What had happened to this prelubricated, sintered bearing to cause the failure.
The Sleeve Bearing Problem A machinist had pressed a new prelubricated, porous sintered bronze bearing in an electric motor. The rotor shaft would not fit into the searing. Measuring the bore, the machinist discovered that it was a few thousandths of an inch undersized. He removed it, put it in a lathe, and bored out the excess material. The bearing was pressed in again, the motor assembled, and put into use. A few days later the motor was back in the shop with the bearing burned out. What had happened to this prelubricated, sintered bearing to cause the failure.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The Sleeve Bearing Problem
A machinist had pressed a new prelubricated, porous sintered bronze bearing in an electric motor. The rotor shaft would not fit into the searing. Measuring the bore, the machinist discovered that it was a few thousandths of an inch undersized. He removed it, put it in a lathe, and bored out the excess material. The bearing was pressed in again, the motor assembled, and put into use. A few days later the motor was back in the shop with the bearing burned out. What had happened to this prelubricated, sintered bearing to cause the failure.
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