On Monday 04 November 2013 03:23:59 John Kasunich did opine:
> On Sun, Nov 3, 2013, at 02:31 PM, Gene Heskett wrote:
> > On Sunday 03 November 2013 13:56:49 John Kasunich did opine:
> > > You really need to get familiar with the McMaster Carr website.
> > > They tend to sell decent quality stuff, and even if you are so far
> > > back in the woods that they have to ship in sunshine, I'm sure UPS
> > > will deliver. (In fact, UPS probably brings in the sunshine.)
> > > McMaster ships from Aurora Oh, so it is probably only 2 days from
> > > you.
> >
> > While I have bought some stuff from McMaster Carr, its more because
> > they may be the only ones stocking what I need. Either way their
> > prices are astoundingly high. Take a nook bronze nut for 1/2" 10 tpi
> > ACME thread, with a 3/4" OD, 11 tpi thread (IIRC) on the outside, so
> > you can use two and adjust easily for very low backlash. 8 or 9
> > years ago when I bought them and a stick of black oxide coated, 1/2
> > 10 tpi acme rod, those 3 pieces were just south of $175. And UPS
> > bent the bolt, about 1/8" in its length. I straightened it as best I
> > could and used it. I should have bought a Chinese ball screw for
> > about that money. A longer one for the lathe was only $138 delivered
> > to my front deck this past summer.
>
> This discussion was originally about taps, and you not being able to
> get what you need from the local hardware store. Good luck getting
> acme threaded rod or nuts there. Yes, the acme nuts from McMaster
> aren't cheap. For that, you find someone who specialized in Acme
> nuts (or get ballscrews from ebay).
>
> > They may have it, but their search engine sucks, worst in the business
> > and if you do manage to find it, they are 2x to 4x too proud of it in
> > the $/item column.
>
> I just went there, typed in "taps". Got me four pictures, "taps", "tap
> cabinets", "tap holders", and "helical insert taps". Clicked on taps,
> got a sidebar with a list of thread sizes end such. Clicked on 8-32,
> got a list of types. Clicked on spiral point, and got a full page of
> taps, ranging from high-speed steel in black oxide or bright for $6.20
> each, coated taps for hardened steel up to C40 for $8.82, high
> performance vanadium steel with various coatings from $11 to $22 (the
> $22 one is designed for production tapping in hardened steel), cobalt
> steel for $8.17, and at the gold plated end of the scale, solid carbide
> for $102.
Yikes! I have a 45yo 6-48 in carbide, seems like I took it off Dave
Hardies hands for a $20 bill in the mid 60's. No use even thinking about
drilling and tapping to mount a scope on an Eddystone made Enfield P17
without carbide tooling, and then you have to spot the drill with a dremel
using a white stone. But given the relative fragility of the carbide, I've
not felt I needed anything but HSS recently. I bought a 5 pack of 0-80's
for attaching the cocking handle for my locking bolt conversion of the
Black Diamond, used them to attach the brass handle to the tool steel
(untreated) locking bar/latch, works well, very clean precise holes, seems
like they were about $6 each. Bought a miniature die too, but have never
used it.
> Clicking on spiral flute instead of spiral point gets you a similar
> selection. Spiral flute works better in blind holes, but I prefer
> spiral point whenever I can possibly design for a thru hole.
>
> I've used their plain old HSS taps (the $6.20 ones) and have had
> great results. I don't know what you consider too expensive for
> a tap, but I'm satisfied.
I was just there last nite to refresh my memory, and also found a huge
improvement. That last time I was there, the only search term that
actually worked was the exact part number from their catalog. They must
have finally hired a webmaster worth his paycheck.
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Now, let's SEND OUT for QUICHE!!
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
------------------------------------------------------------------------------
Android is increasing in popularity, but the open development platform that
developers love is also attractive to malware creators. Download this white
paper to learn more about secure code signing practices that can help keep
Android apps secure.
http://pubads.g.doubleclick.net/gampad/clk?id=65839951&iu=/4140/ostg.clktrk
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
