On Sat, 29 Jul 2017 12:00:02 -0400, time-nuts-request@febo.com wrote: > Send time-nuts mailing list submissions to > time-nuts@febo.com > > Message: 7 > Date: Fri, 28 Jul 2017 14:11:09 -0700 > From: "Gary E. Miller" <gem@rellim.com> > To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > Subject: Re: [time-nuts] Machining some aluminum help! > Message-ID: <20170728141109.71aad750@spidey.rellim.com> > Content-Type: text/plain; charset="utf-8" > > Yo cdelect@juno.com! > > On Fri, 28 Jul 2017 12:46:30 -0700 > <cdelect@juno.com> 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 36 > ******************************************

Kerosine is a better tap lube for Aluminum as it is more persistent and less flammable Content by Scott Typos by Siri > On Jul 29, 2017, at 6:41 PM, Joseph Gwinn <joegwinn@comcast.net> wrote: > >> On Sat, 29 Jul 2017 12:00:02 -0400, time-nuts-request@febo.com wrote: >> Send time-nuts mailing list submissions to >> time-nuts@febo.com >> >> Message: 7 >> Date: Fri, 28 Jul 2017 14:11:09 -0700 >> From: "Gary E. Miller" <gem@rellim.com> >> To: Discussion of precise time and frequency measurement >> <time-nuts@febo.com> >> Subject: Re: [time-nuts] Machining some aluminum help! >> Message-ID: <20170728141109.71aad750@spidey.rellim.com> >> Content-Type: text/plain; charset="utf-8" >> >> Yo cdelect@juno.com! >> >> On Fri, 28 Jul 2017 12:46:30 -0700 >> <cdelect@juno.com> 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 36 >> ****************************************** > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

Kerosene as the cutting fluid and use Acetone to clean up the kerosene afterwards. ______________________ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/29/2017 7:57 PM, Scott McGrath wrote: > Kerosine is a better tap lube for Aluminum as it is more persistent and less flammable > > Content by Scott > Typos by Siri >