pic: low profile 3 CIM gearbox

[Chak]

Originally Posted by Sperkowsky

I believe he cuts his gearboxes with his team's tormach cnc mill.

Originally Posted by OccamzRazor

I really like this gearbox profile. Do you usually cut this out on a water jet and drill the holes separate? If it is 100% water jet cut, how do you account for the stream taper when pressing bearings and whatnot into the side plates?

Thanks. This is just a summer CAD thing I wasn't planning on making, so I assumed I had all the resources in the world . If it came down to it though I would probably use a CNC mill because of all the tapped holes and countersinks in this gearbox.

Originally Posted by Munchskull

Does the middle CIM have a CIMcoder on it?

Yep . I did modify the housing a bit just to make this gearbox work, but thanks sharing the base CAD file! It was conveniently in native Solidworks format too so I could directly modify the features.

Originally Posted by Knufire

Wouldn't it be easier to just support the tip of the output shaft instead of having two bearings on it inside the gearbox?

Yes, but that cantilevers the gear. And cantilevered gears, like the one on 1296's 2016 gearbox or the one in vexpro's ballshifter gearboxes, tend to shred gear teeth, which to my understanding is because of deflection. This can be solved by steel gears, but I thought that not cantilevering the gear was a more elegant solution. Either solution will probably work, so I picked the one I liked better and was more fun to CAD. I don't know for sure, but I feel like not cantilevering the gear is better over the long run of the gearbox.