A fully printable gearbox for 1/10 RC Rock Crawlers.
You can choose between 3 options :
PETG recommanded for heat resistance but PLA+ can also work for the non-overdrive version if you don't ride too hard and/or not for extended period of time. ASA or ABS would probably be even better but I can't test it with my printer.
Each file should already be in the correct print orientation.
Print everything at 100% infill except the 3 main plates and the big gears (30T or more). Those should be fine at
Support required only for the 3 main plates and the transition shafts.
Each part is already elephant-foot compensated, but try not to squish the first layer too hard onto the print bed. Tolerances are very tight and excessive elephant-footing can be a real problem during assembly and may also cause excessive friction and heat during operation. (If your printer does not produce any elephant-footing to begin with, don't worry about it, the baked-in compensation won't cause any problem)
Designed to be used with this driveshaft : https://www.thingiverse.com/thing:6773232
but an adapter could easily be made to work with other driveshaft system
Hardware needed :
Recommanded Motor / Pinion :
Gearbox ratio will depend on overdrive choice and pinion gear choice.
But for the front it will always be :
(60 / Pinion gear)*(33 / 14)
So with a 11T pinion gear and no overdrive, the ratio would be 12.85
(Technical precision : The "overdrive" is actually an underdrive. It function in the exact same way, except the rear wheels get slower instead of speeding up the front)
Thanks to justscalin for the idea
I used this design as an inspiration : https://www.thingiverse.com/thing:4727146
| MHGRBXV8.skp | 7.2MB | |
| MHGRBXV8_-_19T_Transition_gear.stl | 50.9KB | |
| MHGRBXV8_-_33T_FRONT_+_NO_OD.stl | 109.3KB | |
| MHGRBXV8_-_34T_OD_11.stl | 109.8KB | |
| MHGRBXV8_-_35T_OD_24.stl | 115.3KB | |
| MHGRBXV8_-_60T_Spur_Gear.stl | 199.5KB | |
| MHGRBXV8_-_Casing.stl | 32.9KB | |
| MHGRBXV8_-_Hole_Template.stl | 150.3KB | |
| MHGRBXV8_-_Output_Shaft.stl | 14.1KB | |
| MHGRBXV8_-_Plate_Front.stl | 69.8KB | |
| MHGRBXV8_-_Plate_Middle.stl | 106.7KB | |
| MHGRBXV8_-_Plate_Rear.stl | 109.7KB | |
| MHGRBXV8_-_Strap.stl | 15.7KB | |
| MHGRBXV8_-_Transition_Shaft_Front_ALL.stl | 14.4KB | |
| MHGRBXV8_-_Transition_Shaft_Rear_NO_OD.stl | 12.7KB | |
| MHGRBXV8_-_Transition_Shaft_Rear_OD_11.stl | 17.4KB | |
| MHGRBXV8_-_Transition_Shaft_Rear_OD_24.stl | 17.4KB | |
| MHGRBXV8_-_Upper_Shaft_NO_OD.stl | 116.6KB | |
| MHGRBXV8_-_Upper_Shaft_OD_11.stl | 120.6KB | |
| MHGRBXV8_-_Upper_Shaft_OD_24.stl | 118.7KB | |
| MHGRBX_-_Output_Coupler.stl | 44.7KB |
