heat, expand, but it will expand in all directions (so in theory the hole may get smaller)
however, if you ever watched a video of a guy putting togeather barrels or the ring of steel on a wagon wheel, they are headed then cooled to tighten over the wheel,


so I ,, , not a machinist, but did both take machine shop classes years ago and have slept in a holiday inn express in the recent past,,,,, think you are on the right track