Tarmo5 axle hex end size increase
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I increased the size of the hex ends of the CV shafts and front axles to better fit the wheel hex sockets.
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I experienced a failure on one of my wheel-end CV housings, where the hex end of the housing which fits in the wheel hex socket got rounded off and wouldn't transmit torque to the wheel any more. After I printed another one, I noticed that the fit of the CV shaft in the wheel socket was quite loose. Between calipers, the Onshape model, and the Amazon page for the wheels, I discovered that the CV shaft hex end was 11.6mm wide, but the wheel socket was 12mm. Testing the fit between the wheel and a freshly-reprinted CV shaft showed there was quite a bit of play between the parts, which certainly contributed to the failure.
These models bump up the CV shaft ends to 12mm. They fit much better now - very much like a bolt in a socket wrench. There should be no issues with the CV axles fitting in the bearings (I didn't change any of the bearing journals) or on the wheel spacers (those are a 12.4mm hex).
I created these by editing the OnShape model directly, and have included .stl and .step files of each so that they can be printed or edited as needed.