Summit City Precision Machining LLC  260-459-7031

Every engineer has seen a drawing where someone wrote ±0.0005" on every dimension because it felt safer. The shop reads that callout, quotes the job, and the price climbs before a single chip is cut. The real question is not whether machining cost vs tolerance trade-offs exist, but which dimensions deserve the money. This guide lays out the decision framework we use when reviewing drawings for production tooling, custom projects, and automotive and aerospace work at our Fort