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Safety Factor and Life Calculations for Cross Roller Slew Ring Bearings
Technical Paper
2008-01-2634
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Slew ring bearings takes axial and radial loads and moment simultaneously and are used in rotating mechanisms such as excavators and cranes for earthmoving equipment. For these applications, a cross roller bearings can be used and feature more stiffness than the ball type bearings. In this paper the static and dynamic equivalent loads are calculated for the cross roller type slew ring bearings such as cylindrical roller and tapered roller bearings. As a result, simple formulae were obtained to calculate the safety factors and bearing lives for the cross roller slew ring bearings under simultaneous eccentric axial load and radial load.
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Authors
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Citation
Kashino, N., "Safety Factor and Life Calculations for Cross Roller Slew Ring Bearings," SAE Technical Paper 2008-01-2634, 2008, https://doi.org/10.4271/2008-01-2634.Also In
References
- Kashino N. Ohno S. “Equivalent axial load for slew ring bearings” SAE paper 2006-01-3554
- Harris T.A. Kotzalas M.N. “Rolling bearing analysis - Essential concepts of bearing technology” 2007 Taylor & Francis
- Okamoto J. “Dynamic capacity of rolling & roller bearings” Sep 1988
- Rumbarger J.H. “Thrust bearings with eccentric loads” Machine Design Feb 15 1962
- Lundberg G. Palmgren A. “Dynamic capacity of rolling bearings” Acta Polytechnica 1947
- Lundberg G. Palmgren A. “Dynamic capacity of roller bearings” Acta Polytechnica 1952
- International Standard ISO 281-2007 “Rolling bearings - Dynamic load ratings and rating life”
- International Standard ISO 76-2006 “Rolling bearings - Static load ratings”