Tarmo3 Metal Gear Drive shafts

thingiverse

I opted for the Metal Diff and Motor upgrades on my Tarmo3 but realized I needed thinner driveshafts and metal gears to drive the diff. I visited https://www.thingiverse.com/thing:3873554 and https://www.thingiverse.com/thing:3806086 to find suitable solutions. The plastic gears kept breaking, so I purchased these cheaper metal drive gears from Amazon, hoping for faster performance. You can find them at https://www.amazon.com/gp/product/B007KINCE6/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1. To accommodate the new gearset, I remade the driveshafts, which required heating and pressing in a few metal gears. It was a tight fit but held securely with set screws on each side - one to secure the round part of the shaft and another against the flat edge. I'm having fun experimenting with my Tarmo3, thanks to awesome designs like https://www.thingiverse.com/thing:3546277 and https://www.thingiverse.com/thing:3545173. Kudos to KrisCubed's excellent design at https://www.thingiverse.com/KrisCubed/about.