(12-09-2014, 06:58 PM)TomG Wrote: Dowel pins are always 2-3 tenths oversize so they fit snugly in a nominally sized hole. In reality though, you would ream the hole undersize for a good press fit, or oversize for a slip fit.
Tom
Agreed, but I didn't want to cloud the issue.
I worked as a contractor for years. Some jobs lasted weeks, others months. Some (most?) places wanted you to specify the diameter and tolerance of holes. At the place I work currently, common practice is to specify the fit I want, and let the machinist determine the tolerances. Thus, the hole note reads, "light press fit for .250 dowel pin" They may drill, ream or swage the hole as they desire, as long as I get my fit. It works.
Full of ideas, but slow to produce parts