1:14 1:19 1:27 Dual Shaft Planet Speed up or Speed Reducer Gearbox Double Axis Planet Gear PLS36 This is 36mm diameter gearbox, we even have 42mm, 56mm and so on. if desire other model, contact us.The planetary gearbox can develop or decrease the output speed. You can want the product that fits you in line with your personal needs.This hyperlink is for tools ratio Stage2(1:14, 1:19) Note: Please write down the speed ratio you wish when ordering, or we can ship randomly if with out note.we also have other ratio from 1:3.71 to 1:100, if want different gear ratio, order other hyperlink or contact us.The maximum immediate might speed up to 25,000 rpm, But it is recommended that the utmost output velocity within 10,000 rpm, The data of the speed increaser:Installation dimension:The first photo is for tools ratio of 5.18, 27, 139.(One end Shaft Diameter is 8mm-Milling edge 1mm, and the alternative end Shaft Diameter is 6mm-Milling edge 1mm).L=37mmThe second photo is for gear ratio of other besides of 5.18/27/139.(Both ends Shaft Diameter are 8mm-Milling edge 1mm)L=38mmThe label faces the output shaft of the rate increaser., and the increaser can be used as a reducer in reverse.