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Mcgyver
12-30-2009, 07:46 PM
wanting to do ever more accurate work, I made these taps. They're 1000tpi, so fine you can barely see the threads. my hope to make feed screws with it and with 100 divisions on the dial to work to 1/100,000 of inch. haven't decided whether to put in on the unimat or standard modern...the monarch will get the next gen finer version so i can work to a millionth

http://i785.photobucket.com/albums/yy132/michael01000/DSC_2379Large.jpg

KiddZimaHater
12-30-2009, 07:48 PM
and remember....
NEVER EVER NEVER DROP THEM.:D

dp
12-30-2009, 07:51 PM
Uh oh - those are right-hand threaded. Better start over!

.RC.
12-30-2009, 07:57 PM
I think unless you work in a temperature controlled room, thermal expansion is going to make working to those sorts of levels impossible..

I may be wrong though...

Dan Dubeau
12-30-2009, 09:00 PM
I think unless you work in a temperature controlled room, thermal expansion is going to make working to those sorts of levels impossible..

I may be wrong though...

He's from Canada, so working to millionths is only possible in the spring and fall. Summer, and full on winter, are too drastic of temperature differentials for such fine work....

lazlo
12-30-2009, 09:15 PM
He's from Canada, so working to millionths is only possible in the spring and fall.

Unless he has really hard concrete :p

Carld
12-30-2009, 09:15 PM
Hmmm, well, it looks like you did a fine job of grinding off the threads on a factory made tap. What are you going to use them for, reaming?

darryl
12-30-2009, 09:38 PM
It's a little hard to see- those are acme threads, aren't they?

Not to pick your work apart, but the 453'rd thread in has an atom out of place. Probably a neutrino passed by while you were cutting it.

Doggie
12-30-2009, 09:58 PM
He's from Canada, so working to millionths is only possible in the spring and fall. Summer, and full on winter, are too drastic of temperature differentials for such fine work....


Hey Dan, didin't Mcgyver say something about a summer and winter set??? :D

UHHHH, lets see now 1000 tpi = .001 inch travel per revolution. I shure hope you got a rapid travel on that machine!!! Otherwise you would need a calander to time the movements if done by a hand crank!!! :rolleyes:

Hummmmm, seems like they would be kinda easy to strip, HUH? :eek:

Well now my next question is,,,,WHY??? :confused:

Your friend, Doggie

oldtiffie
12-30-2009, 10:10 PM
Lemmee cee?

Ya gonna tap, ream out and screw the blonde up the road?

Doc Nickel
12-30-2009, 10:13 PM
Actually, he's having fun with you guys. Those are actually taps for making pre-stripped threads, such as those found on aluminum cylinder heads.

Note they're both 'bottoming' taps, so they're meant for pre-stripping shallow blind holes.

:D

Doc.

oldtiffie
12-30-2009, 10:18 PM
On the blonde?

Mcgyver
12-30-2009, 10:36 PM
great responses, lol!

i can't deceive you guys any longer. I didn't make them, came out a T&D makers box who worked where they made P&W cutting tools.

I have no idea if he kept them as a curiosity or if they served some purpose, gauging or what not....anyway i got a kick out of the responses :D

quadrod
12-30-2009, 10:37 PM
For Cadillac norstar head bolt and main bolt holes

Tim Clarke
12-30-2009, 11:26 PM
Well, mac, I'll tell ya, I've heard of full floating threads before. However, these are the first taps I've ever seen that would cut them! Better get them on Ebay quick. You're sitting on a fortune.................

TC

dockrat
12-30-2009, 11:51 PM
should be able to thread to a micron with those

DigiSnapMark
12-30-2009, 11:54 PM
With all the jokes flying, I hesitate to post!

If you actually want to make a really fine feed mechanism, use a 'differential screw'. Ancient device, but awesomely clever!

precisionmetal
12-31-2009, 12:01 AM
It's January 1st coming up, not April 1st, correct? ;)

oldtiffie
12-31-2009, 12:22 AM
Well, mac, I'll tell ya, I've heard of full floating threads before. However, these are the first taps I've ever seen that would cut them! Better get them on Ebay quick. You're sitting on a fortune.................
TC

So is the blonde.

fdew
01-03-2010, 05:59 PM
1/4-100 THD
http://www.thorlabs.us/thorProduct.cfm?partNumber=99940
1/4- 170
http://www.siskiyou.com/adjustment-screws_170tpi-series.shtml

Frank

John Stevenson
01-03-2010, 06:05 PM
Wow sub micron don't tell you know who.................

Doc Nickel
01-03-2010, 06:39 PM
My Logan is capable of something like 224 TPI, according to the chart. I've meant to try making threads that fine, with a corresponding nut, just to say I've done it, but never had the need, time or materials.

I do recall somebody years ago mentioning they'd run across an old (military?) surplus lathe that'd been refitted to turn upwards of 30,000 TPI, for some sort of diffraction grating type experiments.

Doc.

clutch
01-03-2010, 06:57 PM
1/4-100 THD
http://www.thorlabs.us/thorProduct.cfm?partNumber=99940
1/4- 170
http://www.siskiyou.com/adjustment-screws_170tpi-series.shtml

Frank

Must be a form tap.

Clutch

fdew
01-03-2010, 07:19 PM
I do recall somebody years ago mentioning they'd run across an old (military?) surplus lathe that'd been refitted to turn upwards of 30,000 TPI, for some sort of diffraction grating type experiments.

Doc.

That was probably a highly modified jig bore. They are called ruling engines and they can produce 30,000 grooves per inch, usually in a thin gold plating. The screw is much more course but it turned very slow and carefully with interferometer feedback. Errors in the screw threads become well known and are given the name of the man who made them. Gulp.
http://gratings.newport.com/library/handbook/chapter3.asp#3.1.3

Frank

J Tiers
01-03-2010, 07:21 PM
My Logan is capable of something like 224 TPI, according to the chart. I've meant to try making threads that fine, with a corresponding nut, just to say I've done it, but never had the need, time or materials.


If yours is like mine, you'd better cut those in one pass.... the mechanism won't repeat that well.

Lew Hartswick
01-03-2010, 07:32 PM
http://gratings.newport.com/library/handbook/chapter3.asp#3.1.3

Frank
Oops! We're sorry... You have been redirected to this web site because your IP address: 71.33.62.103, the number that uniquely identifies your computer on the Internet, is within a range of IP addresses among several ranges that have been denied access to gratings.newport.com, because they include numerous addresses that have been confirmed as sources of cyber-attacks to our network.



First time I have run into that one. Somehow I don't think

Earthlink should be among that sort of list. I don't know

who or where the 71.33.62.103 is but something must be

screwed up on the internet.
...lew...

Lew Hartswick
01-03-2010, 07:37 PM
It's January 1st coming up, not April 1st, correct? ;)
Youre stealing my line, I just used that on the "Seperating Argon from
air" thread somewhere. :-)
...lew...

lazlo
01-03-2010, 09:41 PM
Oops! We're sorry...

You have been redirected to this web site because your IP address: 71.33.62.103, the number that uniquely identifies your computer on the Internet, is within a range of IP addresses among several ranges that have been denied access to gratings.newport.com, because they include numerous addresses that have been confirmed as sources of cyber-attacks to our network.

LOL! I get that from Time Warner too. So between us, they've blocked a third of the Internet ;)

wierdscience
01-03-2010, 09:49 PM
Haha...that message probably IS the cyber attack:DWhat better way to screw up a website than to post an access denial message.

macona
01-03-2010, 10:06 PM
1/4-100 THD
http://www.thorlabs.us/thorProduct.cfm?partNumber=99940
1/4- 170
http://www.siskiyou.com/adjustment-screws_170tpi-series.shtml

Frank

wow, never knew Thorlabs had tools!

J Tiers
01-03-2010, 10:40 PM
Got the same message as listed above....... I guess sbcglobal is also a nasty old spammer haven.

now they have blocked about half the internet, maybe more.

it strikes me that they could just TAKE DOWN their website and nobody could really tell the difference.

dewat
01-04-2010, 01:46 AM
So is the blonde.

I'm starting to see a pattern here, Tiffie is there something you want to tell us ? :D

macona
01-04-2010, 03:58 AM
Got the same message as listed above....... I guess sbcglobal is also a nasty old spammer haven.

now they have blocked about half the internet, maybe more.

it strikes me that they could just TAKE DOWN their website and nobody could really tell the difference.


Im getting it too. Im on Verizon FIOS. Another good chunk-o-net.

oldtiffie
01-04-2010, 04:05 AM
I am quite legit dewat.

Some must have nasty minds.

Mine - as you would quite correctly expect - was, is and shall be as pure a the driven snow.

Of course.

The Blonde in the French is "le blonde".

One of the better known and regarded of the "Old American Iron" class lathes is?

Of course.

LeBlond.

http://www.google.com.au/search?hl=en&q=leblond+lathe+history&meta=&aq=3sx&oq=le+blonde+lathe

So not OT at all.

Here is the OP:


wanting to do ever more accurate work, I made these taps. They're 1000tpi, so fine you can barely see the threads. my hope to make feed screws with it and with 100 divisions on the dial to work to 1/100,000 of inch. haven't decided whether to put in on the unimat or standard modern...the monarch will get the next gen finer version so i can work to a millionth

http://i785.photobucket.com/albums/yy132/michael01000/DSC_2379Large.jpg

I thought the OP might be intending to tap and screw or ream the lathe.

Of course.

What else?

QED.

I will now start accepting apologies from my left.

The queue is quite substantial.

My sensitive nature is sorely hurt - but I will bear up under these trials and tribulations and give forgiveness and absolution.

As you would expect.

Peter Neill
01-04-2010, 04:16 AM
Got the same message as listed above....... I guess sbcglobal is also a nasty old spammer haven.

now they have blocked about half the internet, maybe more.

it strikes me that they could just TAKE DOWN their website and nobody could really tell the difference.

I get it as well! So now British Telecom must a nasty spambot refuge :D
So that's a big chunk of the UK blocked out then as well.

oldtiffie
01-04-2010, 04:32 AM
All spam originates in the "Spam Capital" in the USA:
http://en.wikipedia.org/wiki/Spam_(food)

boslab
01-04-2010, 04:36 AM
1000 tpi isnt a thread its a surface texture isnt it?
mark

Lew Hartswick
01-04-2010, 10:35 AM
1000 tpi isnt a thread its a surface texture isnt it?
mark
I think I saw that on one of the "surface finish" chips. :-)
...lew...

madman
01-04-2010, 10:42 AM
How did you make them? Like i mean 1000 TPI. Also they look nice. Then i must be going blind cant even see any thread forms on them, You wanna borrow my Canon Camera????

Mcgyver
01-04-2010, 11:35 AM
How did you make them? Like i mean 1000 TPI. Also they look nice. Then i must be going blind cant even see any thread forms on them, You wanna borrow my Canon Camera????

i'll trade em for a big hunk of AL :D

deltaenterprizes
01-04-2010, 01:59 PM
1/4-100 THD
http://www.thorlabs.us/thorProduct.cfm?partNumber=99940
1/4- 170
http://www.siskiyou.com/adjustment-screws_170tpi-series.shtml

Frank
Not too bad price on that 100TPI tap!

Carld
01-04-2010, 02:28 PM
I can cut a 1000 tpi thread on my lathe. All I have to do is set the feed for .001" and I get 1000 rev to the inch and a perfect thread in one pass with only one problem. :mad:

The problem so far is getting the tip of the cutter sharp enough to cut a clean thread. I have been working on that 24/7/365 for the last 40 years and still can't get a sharp enough tip. Close but no thread. :p

Uhhh, is it April 1 yet? :D

madman
01-06-2010, 02:38 PM
How big a chunk you need?

pcarpenter
01-06-2010, 04:27 PM
Lazlo wrote


Unless he has really hard concrete :p


Of course you know McGyver cut those threads with a single point tool he hand ground from some of the carborundum he chipped out of his basement floor:p

Paul

Mcgyver
01-06-2010, 06:18 PM
Of course you know McGyver cut those threads with a single point tool he hand ground from some of the carborundum he chipped out of his basement floor:p

Paul

hey its not all Canuck floors that are the hardest materials on the planet, Evan sent me a piece of his :D

Mikey, I dont need anything, just acting like you....a pack rat!

Carl, you cant see those threads? ya gotta squint a bit (and use some imagination).