Re: Form tapping blind holes, what coolant?
- From: "Tom Accuosti" <taccuostiMY@xxxxxxxxxxxxxxxxxx>
- Date: Mon, 7 Jan 2008 11:26:12 -0500
Randy wrote:
I will be tapping a bunch of 4-40 blind holes in 6061 alum, would like
to just keep using my flood coolant, even though I know a bunch of
guys here hate "toilet water". Ran a few test samples and manually
applied lube. I was afraid of the coolant trapped under the tap and
hydraulicing it. What works? go slow so the coolant can get out, or
just abandon the flood and manually blow out the holes and add lube?
You can get form taps that have three or four pronounced "lobes".
Alternately, some will have an oil groove cut along one side. Either one
should work just fine in Aluminium with water. We tap bling holes in our
lathes all the time that way.
Tom
.
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