A mix of mission-critical components for high-stakes applications makes visual inspection a key part of the process for Westfield, Massachusetts, manufacturer Tell Tool Inc. The company manufacturers complex machined castings, forgings, and wrought material for aircraft and spacecraft, so quality control is important to Tell Tool, an ISO 9001- and AS9100-registered company.

For products such as electronic engine controls, hydromechanical fuel controls, auxiliary power units, pump housings, and jet fuel control housing, blueprint requirements are stringent. “If the part doesn’t meet blueprint tolerances, Tell Tool must reject it,” says Michael Ostrowski, head of Tell Tool’s purchasing team. “There’s no repair allowed; the customer will not receive the part. It’s that critical. If a burr were clogging a passageway when the engine is calling for fuel, you could have a catastrophic failure of the engine.”

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