The internal crank shaft that opens and closes a large market umbrella in my back yard shattered. It appears to be what I’ve always called pot metal. Maybe Zinc? Zinc alloy? Anyway, crap!
First, here’s the F360 design I slapped together. (You must remove the .zip extension to open in Fusion)
umbrella crank connector no screw hole v1.f3d.zip (146.9 KB)
I printed a prototype in PLA, made some adjustments then printed one in PETG and another in ABS. Both broke at the base of the hexagonal part of the shaft. 100% infill BTW. I’ll try another in PC but am not too optimistic.
So, why I’m here. It seems I should be able to machine this but it’s way beyond my mostly 2D CAM experience. A little help would be much appreciated.