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The Effect of Rotor Crossdrilling on Brake Performance
Technical Paper
2006-01-0691
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A review of available information on the effect that brake rotor crossdrilling has on brake performance reveals a wide range of claims on the subject, ranging from ‘minimal effect, cosmetic only’ to substantially improving brake cooling and fade resistance. There are also several theories on why brake rotor crossdrilling could improve fade performance, including crossdrill holes providing a path for ‘de-gassing’ of the brake lining material and increasing the mechanical interaction, or ‘grip’ of the lining material on the rotor.
This paper reviews three case studies in which the opportunity arose to compare the performance of brake systems with crossdrilled versus non crossdrilled brake rotors in otherwise identical brake corner designs. The effect of brake rotor crossdrilling on brake cooling, brake output, brake fade, wet brake output, and brake wear rates were studied using both on-vehicle and dynamometer data. Some data were generated comparing the interaction effect on brake performance between brake lining material and brake rotor crossdrilling; however most of the study focuses on the effects of rotor crossdrilling with a single lining material. Where possible, evidence in the test hardware, the test data, and brake corner design features are related in an attempt to understand the mechanisms by which crossdrilling affected brake performance. Conclusions are drawn based on the data generated and observations made with the brake systems of the three case studies.
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Citation
Antanaitis, D. and Rifici, A., "The Effect of Rotor Crossdrilling on Brake Performance," SAE Technical Paper 2006-01-0691, 2006, https://doi.org/10.4271/2006-01-0691.Also In
SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V115-6; Published: 2007-03-30
Number: V115-6; Published: 2007-03-30
References
- Antanaitis, D. “Measuring and Characterizing Brake System Performance in Race Track/ High Energy Driving Conditions” SAE paper number 2005-01-0790
- Williams, J. A. Engineering Tribology 350 358 Oxford University Press 1994
- Herring J. M. Jr., “Mechanism of Brake Fade in Organic Brake Linings” SAE 670146
- Hildred, A. K. Brooks, P. C. Barton, D. C. Whitaker, R. “Micromechanical Modelling of Friction Materials” SAE 2001-01-3133