On Sat, 29 Jul 2017 22:49:10 -0400, [email protected] wrote: > > ------------------------------ > > Message: 2 > Date: Sat, 29 Jul 2017 20:57:56 -0400 > From: Scott McGrath <[email protected]> > To: Discussion of precise time and frequency measurement > <[email protected]> > Subject: Re: [time-nuts] Machining some aluminum help! > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > Kerosine is a better tap lube for Aluminum as it is more persistent > and less flammable
NO. Kerosene is *not* a good lubricant for _forming_ taps. Kerosene (WD-40) and alcohol are good lubricants for _cutting_. For _forming_, one needs something very viscous, something that lubricates at very high pressures, at the yield strength of the material being formed. Joe Gwinn > Content by Scott > Typos by Siri > >> On Jul 29, 2017, at 6:41 PM, Joseph Gwinn <[email protected]> wrote: >> >>> On Sat, 29 Jul 2017 12:00:02 -0400, [email protected] wrote: >>> Send time-nuts mailing list submissions to >>> [email protected] >>> >>> Message: 7 >>> Date: Fri, 28 Jul 2017 14:11:09 -0700 >>> From: "Gary E. Miller" <[email protected]> >>> To: Discussion of precise time and frequency measurement >>> <[email protected]> >>> Subject: Re: [time-nuts] Machining some aluminum help! >>> Message-ID: <[email protected]> >>> Content-Type: text/plain; charset="utf-8" >>> >>> Yo [email protected]! >>> >>> On Fri, 28 Jul 2017 12:46:30 -0700 >>> <[email protected]> wrote: >>> >>>> After mounting the tap in the drill >>>> press and putting a dab of Crisco on the tap I was able to tap each >>>> hole to a depth of 7/16" as fast as I could turn the handwheel! >>> >>> >>> Cool! >>> >>> I suggest you get some real cutting fluid. The threads will be smoother. >> >> I second that. What I use is a lubricant wax made by Lenox, the saw >> maker. It's intended for metal-cutting band saws, but works just >> splendid for form taps. There are many equivalents. >> >> By the way, when drilling aluminum, use denatured alcohol as the >> cutting fluid. This will prevent aluminum gumming up the cutting edge >> of the drill. >> >> And, as others have mentioned, one does not use the same size drill for >> forming taps as for cutting taps. The diameter accuracy required can >> only be achieved by using the correct number (versus fractional) drill >> bit size. Do not use Chinese drill bits - steel not good enough. US, >> Japan, Germany et al are OK. >> >> Joe Gwinn >> >> >>> RGDS >>> GARY >>> --------------------------------------------------------------------------- > > End of time-nuts Digest, Vol 156, Issue 38 > ****************************************** _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
