Parts like the CNC site listed would indeed work for the stepper to drive shaft *if* I wasn't working with such odd diameters. Going from 3/4" to 8mm is not common enough to be a stocked (or even an optional) item for any of the guys I have found.
----------------
Parts are beginning to pile up in odd corners around the house. As I move them from corner to corner .. they are heavy. I probably should start adding up all of the weights. Using bar stock for the arms may get crossed off the list once I do. (they add about 10 lb to the total). Swapping them out for a hub mounted extruder sounds like a better use of that part of the weight budget.
The plastic drive nuts are rated at 1,400 lb each. My guess is that the floor loading will be an issue before they are even if I cut away part of them.
----------------
Parts are beginning to pile up in odd corners around the house. As I move them from corner to corner .. they are heavy. I probably should start adding up all of the weights. Using bar stock for the arms may get crossed off the list once I do. (they add about 10 lb to the total). Swapping them out for a hub mounted extruder sounds like a better use of that part of the weight budget.
The plastic drive nuts are rated at 1,400 lb each. My guess is that the floor loading will be an issue before they are even if I cut away part of them.