I’ve a friend that works in a gear shop and they press fit bearings onto shafts all the time. Cool one of the pieces and heat the other. They EDIT: do this with an oven and and cryogenic bath, but I would think on your scale you wouldn’t need those extremes?
I’ve got a small electric kiln and access to dry ice so I’ll keep the temp difference in mind for future projects!
I definitely would have tried the temp technique and failed miserably so i appreciate the shout for certain geometries not working. That would have been a time consuming lesson to learn.
I also would have absolutely cut both pieces before realizing one had sharp corners and the other did not… Which would have resulted in trying to reclamp the part and screwing it up anyway
That one certainly saved me some material!
@WillAdams Correct! They purposely machine for an interference fit and once the parts are assembled this way, they will not come apart without complete destruction. I’ve had the good fortune to watch both the assembly and disassembly and wow! You only get one chance putting things like this together, stand back and watch the pros!
BTW - I think the largest mill in that shop has a 30’ X 6’ (yes, foot) bed and amazingly, to me is they say it’s good for about .001" over that distance!