A Guide to Sheet Metal Tolerances
August 19, 2026
A bracket looks simple on the print until the holes miss the mating hardware by .020 inch, the flange angle
A bracket looks simple on the print until the holes miss the mating hardware by .020 inch, the flange angle
A prototype slips a week, a build schedule compresses, and suddenly the supplier decision that looked fine on paper becomes
A prototype schedule usually slips long before the shop floor sees the job. The delay starts in the handoff –
A part can look simple on a print and still become a problem on the shop floor. Tight bend locations,
A standard catalog part works fine until it does not fit the enclosure, misses a tolerance stack, or creates headaches
A prototype enclosure that looks simple on a screen can become a schedule problem fast once tolerances stack up, bends
When a program stalls, it is rarely because a bracket was conceptually difficult. It usually comes down to execution, a
A prototype that looks right on the bench can still fail the moment it hits a production schedule. That is
A print calls for flatness that leaves little room for springback, hole locations that must align with mating hardware, and
When a prototype build stalls because one enclosure, bracket, or formed chassis is late, the schedule impact rarely stays contained.
When a build reaches assembly, small fabrication issues stop being small. A hole pattern that is slightly off, a bend
A prototype rarely fails because the CAD looked bad on screen. It fails when a part arrives late, a tolerance
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