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Critical finish in ID sphere

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ncassist

Industrial
Nov 17, 2002
12
I'm trying to get a "mirror" finish in an internal spherical dish in aluminum. Diameter is about 3/4 inch and depth is about .200 inch in 6061 aluminum in CNC lathe. So far the best we can do is machine and "lap" by finger with car polish. Anyone got any ideas?
 
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Try an industrial diamond tipped round insert (PVD) for a finishing tool. These are a little pricey but they last forever in aluminum and it's faster than lapping.
 
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