Lathe version 3 remix

thingiverse

This is a remix from: https://www.thingiverse.com/thing:4678844 In order to get a safe-ish operating speed from a salvaged electromotor, I designed a large 200 teeth timing belt pulley and a small 35 teeth pulley to get a 1:6 ratio. Alternatively, you can also run smaller gears on the motor to get a crazy 1:10 ratio. I have tried larger reductions using spur gears and I even tried to get planetary gears in the system. Due to the high speed of the electromotor and inevitable friction, these melted during operation and if they didn't, they would make a terrible noise. For the mini-lathe, and the electromotor you should stick with belt or timing belt transmissions since they are reliable and can handle some shock loads. On top of that, compared to the terrible noise of spur gears at high speeds, belt transmissions are pretty good. The performance of the big wheel/gear is ok. It is not designed as a gt2 pulley but I have not found it slipping or losing grip. The small gear is also not designed as a gt2 pulley, however, it meshes with the belt giving it an excellent grip. To model these parts I used the standard toolbox from Solidworks. Both parts are module 0.6 spur gears derivatives. This remix is far from perfect and is not how I would like it to be. Nevertheless, I wanted to get it out there to see who else is working on the mini-lathe. Please leave a comment if you have ideas for improvements. I will keep on working on it as well, improving this mini-lathe. LINKZZ Belt: https://www.123-3d.nl/123-3D-GT2-timing-belt-6-mm-gesloten-696-mm-i2750-t12750.html any other long gt2 belt will work as well. mini-lathe: https://www.youtube.com/watch?v=SEXzAz78ZC4&feature=youtu.be electric motors: https://www.youtube.com/watch?v=SrPHQh-M3pM&t Recommendation If you are looking to build the mini-lathe, I would recommend that you first do some research on electric motors. Make sure to get the right one with plenty of power and reasonable RPMs. Also, look into safe lathe speed and do calculations on cutting speed and the diameter of your workpiece. It is the easiest for you to get yourself an electric motor with 2k-5k RPMs rather than a 20k-30k rpm (Dremel or another high rpm motor). lastly, I would like to empathize to always wear safety goggles whenever you build something stupid like this mini-lathe from plastic. :)