1:3.71 1:5.18 Dual Axis Planet Gear Speed up or Speed Reducer Gearbox Double Shaft PLS36 PLZ36This is 36mm diameter gearbox, we also have 42mm, 56mm and so on. if need different model, contact us.The planetary gearbox can increase or lower the output speed. You can want the product that fits you consistent with your own needs.This hyperlink is for gear ratio Stage1(1:3.71, 1:5.18) we also have different ratio from 1:3.71 to 1:100, if want other tools ratio, order different link or touch us.The most instantaneous may possibly speed up to 25,000 rpm, But it's endorsed that the utmost output velocity inside 10,000 rpm,The data of the rate increaser:Installation dimension:The first photograph is for gear ratio of 5.18, 27, 139 , (One end Shaft Diameter is 8mm-Milling edge 1mm, and the other finish Shaft Diameter is 6mm-Milling edge 1mm).L=29mmL=31mmThe second picture is for equipment ratio of alternative except of 5.18/27/139.(Both ends Shaft Diameter are 8mm-Milling edge 1mm)The label faces the output shaft of the rate increaser., and the increaser can be utilized as a reducer in reverse.