M35A2 reinforced transmission shaft solutions

thingiverse

After spending many many time facing robustness issue with classic transmission parts I have found a design which is working for me in soft off road conditions. I didn't test it in hard usage as crawler do, it is still platic then there is a limit. 1/ double square joint it allows 2 full screws crossing the shaft then torque level is improved --> I tried in PLA = break after few minutes --> currently they are made of wood = it works up to now no issue so far --> the best would be aluminium 2/ to print shafts in horizontal position, it is stronger (fill in 100%) 3/ to use reinforced U joint (horizontal printing) 4/ central differential ratio changed --> it will be uploaded soon 5/ to remove differential front / rear and central the 4 gears are too small and brake quiclky in off road conditions video here: https://youtu.be/UJJZdykP2GI https://youtu.be/rvvbTu28COc enjoy