Green locktite will hold it for finger movement.I have a .375 through bore, about .150 thick. I need to bush the hole and drill new hole of center to the original bore. Through the new hole will be a shaft that will spin. This will see very light load, being turned with fingers.
What size shaft should I turn?
Everything is simple steel, either CRS or HRS equivalent. I can freeze the bushing in home freezer, heat the piece its going into in a standard kitchen oven, or use a 20T hydraulic press. Also any combination.
This strikes me as a good plan, or at least backup plan to cutting 0.0002" over. You're not only looking for an interference fit (for the outside of the bushing), but you need a sliding fit on the inside, which means too much external interference is likely to ruin the sliding fit. I'd try for the "right" thing first - after all it's pretty cool to hit a dimension to tenths, but a knurl is a quick and near certain way to recover if you miss.I'd consider a slightly shallow straight knurl on size instead of an interference fit, or size on size with loctite.
Im going to drill the internal hole after pressing in the 'plug'This strikes me as a good plan, or at least backup plan to cutting 0.0002" over. You're not only looking for an interference fit (for the outside of the bushing), but you need a sliding fit on the inside, which means too much external interference is likely to ruin the sliding fit. I'd try for the "right" thing first - after all it's pretty cool to hit a dimension to tenths, but a knurl is a quick and near certain way to recover if you miss.
GsT