Hi,
I would like to install oilite bushings in an aluminium casting for a
small steam engine which presently has poor bushings. Would the proper
procedure be to drill the casting undersize and then ream the bore to the
correct size for a snug fit? For a 1/4 in O.D. bushing would I ream the
hole to exactly 1/4 in or should it be slightly undersize? Can you buy a
reamer that is slightly undersize for this purpose? What about adjustable
reamers?

Thanks

Rod