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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Allowance for anodizing
I have some Aluminum parts, 7075 T6, for machining and will anodize at home using the sulfuric acid / battery charger method, or a variation. For the tight tolerance parts, do I need to machine, ream, oversize to allow for the anodizing? If so, how much? I've seen recommendations of .001"-.002" per surface, is that about right? For example, one of the hole sizes in the drawing is .251" +/- .001, the instructions by others that have built these parts say to use a .251 reamer, so that's what I bought. But now reading the anodizing info I'm wondering if I need to ream to .253 or so? RogerN |
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