4 Speed Manual Gearbox

thingiverse

This is a fully functional gearbox, it has 4 speeds, 3 foreward and 1 reverse. Video here: https://www.youtube.com/watch?v=aXXH8JMoDXg All files have to be printed once, for duplicate parts there are multiply files. If there are files missing feel free to contact me, there were problems uploading. ### Additional Hardware: - The Shafts are solid 4mm brass rods. - 2x Main Shafts 185mm - 1x Shifter 1 Shaft 90mm - 1x Shifter 2 Shaft 155mm - 1x Reverse Gear Shaft 70mm - The Design is bolted together with M3 Screws of varios lengths. - 14x M3x16 - 9x M3x20 - 8x M3x25 In most places you can use longer screws if you dont have the correct lengths. - The motor the typical 90° geared dc motor you find on ebay or aliexpress I used one rated at 19 RPM 6v, but it could be a little faster. - The coupler for the motor is a flexible coupler from 6mm to 4mm ### Assembly To fix the gears as well as the shifter mechanism to the shafts I roughed up the shaft and then used CA-glue. All gears on the input shaft and the two center gears on the outputshaft are fixed. The others move on their shafts. I used Silicon Grease on all the moving parts that touch the shafts.