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Effect of Rolling Bearing Refurbishment and Restoration on Bearing Life and Reliability (en Inglés)
Nasa Technical Reports Server (Ntrs)
(Autor)
·
Erwin V. Zaretsky
(Autor)
·
Emanuel T. Branzai
(Autor)
·
Bibliogov
· Tapa Blanda
Effect of Rolling Bearing Refurbishment and Restoration on Bearing Life and Reliability (en Inglés) - Nasa Technical Reports Server (Ntrs) ; Zaretsky, Erwin V. ; Branzai, Emanuel T.
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Origen: Estados Unidos
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Reseña del libro "Effect of Rolling Bearing Refurbishment and Restoration on Bearing Life and Reliability (en Inglés)"
For nearly four decades it has been a practice in commercial and military aircraft application that rolling-element bearings removed at maintenance or overhaul be reworked and returned to service. The work presented extends previously reported bearing life analysis to consider the depth (Z(45)) to maximum shear stress (45) on stressed volume removal and the effect of replacing the rolling elements with a new set. A simple algebraic relationship was established to determine the L(10) life of bearing races subject to bearing rework. Depending on the extent of rework and based upon theoretical analysis, representative life factors (LF) for bearings subject to rework ranged from 0.87 to 0.99 the lives of new bearings. Based on bearing endurance data, 92 percent of the bearing sets that would be subject to rework would result in L(10) lives equaling and/or exceeding that predicted for new bearings with the remaining 8 percent having the potential to achieve the analytically predicted life of new bearings when one of the rings is replaced at rework.. The potential savings from bearing rework varies from 53 to 82 percent that of new bearings depending on the cost, size and complexity of the bearing.
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