KSMP series KitchenAid pasta roller shaft

I killed 2/3 pasta rollers in my set, which prevented me from making pasta.
Well, it didn't, but it was really annoying to do by hand, and it meant I could only have fettucine.

So I designed a new shaft for these - it should be essentially an exact copy, except the failsafe shear bar is 2.16x as thick to try and compensate for the fact that brass has a shear modulus roughly 10x of PLA. In any case, I havent tested how strong it is, so don't put your fingers in it.

Print at 100% infill (it is easier and more reliable to set 'wall line count (or similar) to a very high number instead of setting infill to 100%) in whatever is the strongest filament you have. PLA works for me. print at 120% flow, with a 0.15 layer height, on its side so that the layer lines are perpendicular to the rotation plane and thus far far far stronger.

You shouldn't need to modify it, but I've included STEP and f3d file formats here as part of an effort to try and boost remix culture. If you see this, consider uploading STEP (and f3d/sldprt files where appplicable) files with your models, as STLs are no good to try and modify in 3d modelling softwares.

V2

Use this. the only change is the hexagonal end now has an circumscription radius of 4.2 instead of 4. it will need about 30 seconds of filing to make it fit.

the step and f3d are for v1. If you are modifying it, you know how to increase the shaft size.