[VAC] Re: Stripped threads and tapping aluminum

[Dr. Gerald N. Johnson, electrical engineer]

But first tap with a taper or plug tap. You need to have the tapered
unfinished threads in the hole before finishing with the bottoming tap.
A plug tap probably will get threads enough to be a bit tight on the set
screw but not so tight to prevent it holding on the shaft.

Kerosine is as good a cutting oil as any fancy commercial cutting oil
for aluminum, the door handle could easily be die cast zinc or alloy.

Gerald J.



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