[ithacaartist]

The interference fit is great--it will never be shot loose, and there's no mess to clean up.

I had occasion to take such a joint apart some years ago. I was working in a local fabricating shop and, to the owner's specs, had made a short set of special dies for the press brake. The whole assembly was too short, it turned out, and the screws that moved the upper frame up and down to adjust it were extended so far that the force of the stroke offset the few threads that were turned into the socket by about .003". The threads would bind when running the screw upward due to this offset portion.

The socket component was held by a large resistance fit pin to an offset hole in a large wheel. We heated the dickens out of the material surrounding the pin and applied the output of a CO2 fire extinguisher to the exposed end of the pin--and off she came. The offset threads were trimmed by the machinist, and the parts were heated and cooled similarly for re-assembly. The moral of the story is that such a joint can, indeed, be manipulated, rotated, or undone.

Another way to get a hefty bond is to create a slick slip fit. Then apply three evenly spaced rows of center punch dimples to "strawberry" the O.D. of the inside piece for a tap fit into the corresponding hole. When the inserted piece bottoms out, rotating it slightly positions it so that the strawberry marks resist being drawn back through fresh material. But at this point, I think I like the heat/cool joint, for this job.