https://youtu.be/OurOQsk5KeA A series of cogs designed to work seamlessly together for all your 3D Printing projects. This series of 5 cogs when used in pairs results in 20 ratio combinations ranging from 1:3/3:1 and everything in between. The cogs have been design for ease of use with centre to centre dimensions calculated by summing the total number of teeth being used and dividing by two. For projects that require low friction (i.e wind turbine) where backlash isn’t critical increase the centre spacing in 0.1mm increments until the desired result is achieved. The cogs have been left stock with no light weight/material saving features included, this can be added at the descretion of the user.