ABSTRACT
Figure23.46showstherelationshipbetweentheequivalentmechanicalrollcrownandcrossanglefor variousrollcrossingsystems.Theworkrollcrossingsystemisthemostefficientsystemwhilethebackup rollcrossingsystemistheleastefficient.Paircrossedrollingisnearlyasefficientasworkrollcrossing. Neitherworkrollcrossingorbackuprollcrossingsystemshavebeenfoundtobepracticalbecauseofroll wearandtheconsiderableenergylossduetotherelativeslipbetweentheworkrollandbackuproll.
