Ender 3: Oldham coupler for Z nut

thingiverse

So this is a remix of mala04's oldham coupler. BUT! unlike my other coupler, this one is specifically for the ender 3. (this is all based off a model I found of the ender, please let me know if something needs to change...mine is still 1 paycheck away.) Its fits together like so: C B A The main change was that I don't like sanding and neither does my nylon so I got rid of the outwards offset of the parts meant to be used for sanding down to fit. So hopefully I've saved you some trouble too. Still should probably use some lube! I did however add an inwards offset of .1mm for one version of the A & C parts. I've found in prints I've made that a .1 offset produces a tight slide in fitting so I've added that for this model. There is also a model with no offset. Other minor changes were made to round corners in the xy axis to produce smoother/ better printed parts & chamfered the base to prevent elephant's feet. I also provided a step file because its honestly annoying to work from mesh files (though i do admit mala04's was easier to work with than most. really clean mesh gj!) Edits: 9/25/18 - I did not realize how much nylon shrinks. I'm going to continue testing but I now have 3 different A & C files: Negative offset: if your printer isn't top notch & you want the parts to properly slide. No offset: if your printer has very low z wobble & you're printing in ABS/PLA/ or a low shrink plastic Positive offset: If you're printing in nylon or another material that shrinks a lot.