Assessing workability of greased bearings after long-term storage

Abstract Here, we developed a technique to assess the workability of sealed-for-life greased rolling bearings after a long-term storage. In this framework, we devised a model of equivalent transition between the conditions of natural ageing under daily and seasonally fluctuating temperature, and the...

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Main Authors: Michael Varenberg, Yuri Kligerman, Grigory Halperin, Saad Nakad, Haytam Kasem
Format: Article
Language:English
Published: SpringerOpen 2018-12-01
Series:Friction
Subjects:
Online Access:http://link.springer.com/article/10.1007/s40544-018-0255-1
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author Michael Varenberg
Yuri Kligerman
Grigory Halperin
Saad Nakad
Haytam Kasem
author_facet Michael Varenberg
Yuri Kligerman
Grigory Halperin
Saad Nakad
Haytam Kasem
author_sort Michael Varenberg
collection DOAJ
description Abstract Here, we developed a technique to assess the workability of sealed-for-life greased rolling bearings after a long-term storage. In this framework, we devised a model of equivalent transition between the conditions of natural ageing under daily and seasonally fluctuating temperature, and the conditions of accelerated thermal ageing at a constant high temperature. The tested bearings were thermally aged, and then their steady state friction and outer ring temperature were examined in a custom high-speed spindle. These results were compared to the performance of a reference new bearing tested under the same loading conditions. Our findings suggest that long-term storage can significantly degrade the performance of sealed-for-life greased rolling bearings. However, a proper running-in can substantially deter the ageing-driven degradation of the bearings.
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spelling doaj.art-47c345073171476e8cc44b86633be67f2022-12-22T01:14:37ZengSpringerOpenFriction2223-76902223-77042018-12-017548949610.1007/s40544-018-0255-1Assessing workability of greased bearings after long-term storageMichael Varenberg0Yuri Kligerman1Grigory Halperin2Saad Nakad3Haytam Kasem4George W. Woodruff School of Mechanical Engineering, Georgia Institute of TechnologyDepartment of Mechanical Engineering, Technion-Israel Institute of TechnologyDepartment of Mechanical Engineering, Technion-Israel Institute of TechnologyDepartment of Mechanical Engineering, Technion-Israel Institute of TechnologyDepartment of Mechanical Engineering, Technion-Israel Institute of TechnologyAbstract Here, we developed a technique to assess the workability of sealed-for-life greased rolling bearings after a long-term storage. In this framework, we devised a model of equivalent transition between the conditions of natural ageing under daily and seasonally fluctuating temperature, and the conditions of accelerated thermal ageing at a constant high temperature. The tested bearings were thermally aged, and then their steady state friction and outer ring temperature were examined in a custom high-speed spindle. These results were compared to the performance of a reference new bearing tested under the same loading conditions. Our findings suggest that long-term storage can significantly degrade the performance of sealed-for-life greased rolling bearings. However, a proper running-in can substantially deter the ageing-driven degradation of the bearings.http://link.springer.com/article/10.1007/s40544-018-0255-1grease lubricationball bearingsthermal ageinglubricant degradation
spellingShingle Michael Varenberg
Yuri Kligerman
Grigory Halperin
Saad Nakad
Haytam Kasem
Assessing workability of greased bearings after long-term storage
Friction
grease lubrication
ball bearings
thermal ageing
lubricant degradation
title Assessing workability of greased bearings after long-term storage
title_full Assessing workability of greased bearings after long-term storage
title_fullStr Assessing workability of greased bearings after long-term storage
title_full_unstemmed Assessing workability of greased bearings after long-term storage
title_short Assessing workability of greased bearings after long-term storage
title_sort assessing workability of greased bearings after long term storage
topic grease lubrication
ball bearings
thermal ageing
lubricant degradation
url http://link.springer.com/article/10.1007/s40544-018-0255-1
work_keys_str_mv AT michaelvarenberg assessingworkabilityofgreasedbearingsafterlongtermstorage
AT yurikligerman assessingworkabilityofgreasedbearingsafterlongtermstorage
AT grigoryhalperin assessingworkabilityofgreasedbearingsafterlongtermstorage
AT saadnakad assessingworkabilityofgreasedbearingsafterlongtermstorage
AT haytamkasem assessingworkabilityofgreasedbearingsafterlongtermstorage