China Flender Vertical Mill Planetary Gearbox (kmps/kmp), Find details about China Flender Vertical Mill Gearbox, Vertical Mill Planetary Gearbox from Flender... Read more. Vertical Roller Mill Gearbox Reduction Ratio Calculations SlideShare. Jun 3, 2014 ... This document presents the calculations for finding out the Gear Ratio of a 3 stage (BevelHelicalPlanetary) gearbox for Vertical ...