I'm looking to manufacture some steel pins and plates, with a view to large scale production in the future. One of the pins of the design has a constant diameter. This pin passes through holes in two different plates. One of the plates has an interference fit with the pin and the other has a clearance fit with it.
To me, this sounds like it should use a shaft-based system, where the shaft diameter is constant and the hole sizes vary. Given, however, that the difference between hole diameters is only a matter of tens of microns and I've heard that it is typically harder to make non-standard holes than non-standard shafts, I am wondering whether I should use a hole base system, where the hole sizes in both plates are the same and the pin has a small step (tens of microns) to accommodate the different fits.
I think the hole-base system could work but the question really comes down to whether it is easier to accommodate the tiny difference in fit through the manufacture of the shaft or the hole.