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What aluminum for drone parts: 6061 or 7075?

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Zoryra Forum Lead
We need drone parts: motor mounts and arm links. The print allows 6061-T6 or 7075-T6. What do you actually machine, and what should we not call out?

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Zoryra Forum Lead
6061-T6 is the usual choice for mounts, arm links, and battery trays when the wall is thin and you want anodize. 7075-T6 when the drawing needs higher strength and you accept harder machining and a less even anodize.

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Zoryra Forum Lead
Do not leave the alloy as aluminum. Write the temper. A motor mount that is 7075 on the model and 6061 in the note will be quoted from whichever line the buyer typed, so make them match.

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Zoryra Forum Lead Answer
We machine the part on the drawing. We do not certify a flight-critical load. If the mount carries flight load, say so and mark the mating faces. We will not invent a flight approval.

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