Summit City Precision Machining LLC  260-459-7031

A dowel pin hole that is 0.01 mm off can make a fixture that worked on the prototype fail at the first production lot. Dowel pin hole machining looks simple on a print, but location and retention depend on decisions made long before the pin is pressed in: the fit callout, the reaming allowance, the entrance condition, and how you measure the result. In our shop, most dowel problems start with a callout that was open to interpretation or with holes that were correct on paper b