I need to have a block of aluminum milled such that a column is left protruding. In other words, a 1" tall block ,mill it down to 1/2" such that there is a 1/2" tall round column 1/4" in diameter remaining.
Is this strictly CNC territory? Or is there a way to do this on a mil "by hand" (w/o CNC capability)?
Or maybe you can suggest a better forum in which to ask this question...
As Ned intimates, Please consider drilling and boring a 1/2" thick sheet 0.5" diameter and then heating in an oven it to expand. Press in a chilled 1/2" diameter
1" long aluminum pin that is 0.001" larger than the hole is (at room temperature).
If you don't want to do a shrink fit, consider machining to a tight slip fit (Hole large by ~0.001") and apply Loctite 609 to fix it in place.
That's certainly how I'd do it; if I needed large quantities I'd look for a self-centering 4-jaw or I'd see if I could make the inside of a soft collet square.
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