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Done designing the gearbox V3A, I might do other ratios hence the A.
This is much sturdier than the V2 design and should work fine with the V3 truck, I've testdriven it quite roughly both on tarmac and indoors without issues.
4x M3x16 for the housing cap
2x M3 for mounting the motor
2x M3x10 for the bearing cap
1x M3x16-25 for the U-joint attachment
2-3 M3x16 for mounting the gearbox to frame
1x M3 grubscrew for securing motor gear to shaft
4x 6700zz bearings(10x15x4mm)
Print the two housing parts at 20-30% infill, the cap will require support, you can use similar settings for the bearing cap.
Print all shafts and gears at 60-80% infill, the shafts you can print with 3 perimeters to make them even stronger. Adjust your extrusion width to get as much infill as possible in the teeth of the gears.
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