Insights
Notes on precision machining, metrology and aerospace quality
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What AS9100D adds to ISO 9001, and why primes filter on it
AS9100D is ISO 9001:2015 plus roughly a hundred aerospace-specific requirements. Here is what the additions cover and what they mean when you are approving a machining supplier.
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Work envelope versus part envelope — sizing a job to a machining centre
A machine's travels are not the space your part can occupy. How to read a VMC specification, and the four numbers that decide whether a job fits.
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Reading a CMM specification, and why "1.7 µm" is not an accuracy figure
A coordinate measuring machine's headline number is the constant term of a formula. Here is how to read E0,MPE and work out what a CMM will actually hold over your part.
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Why in-house metrology shortens a qualification timeline
Most shops at this scale outsource inspection. Keeping the CMM in the building changes the feedback loop between machining and measurement, and that is where the time goes.
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First Article Inspection to AS9102, and what your supplier owes you
FAI is not optional for an AS9100 supplier when the customer invokes it. What Forms 1, 2 and 3 cover, when a partial FAI is enough, and what triggers a re-run.
