Re: [Emc-users] long set screw

2012-07-16 Thread Gene Heskett
On Monday 16 July 2012 04:43:01 jeremy youngs did opine:

  Greetings all;
  This need for a long allen set screw as the starting material for
  this differential screw that Andy reminded me of is being a problem. 
  fleabay searches don't seen to be getting any hits tonight.
 
 how long gene and what thread flavor? a piece of drill rod could be
 milled to make a broach, with pilot and steps cuti in a lathe then
 hadened and used in bridgeport to make the shaped hole? and you could
 use the same piece of drill rod as your screw and neck it slightly for
 a ways so as to leesen the likely ]hood of it breaking just thoughts

Any 'thought' may contain the seeds of a solution idea, thanks.

I have a couple sticks of 1/2 drill rod for raw material, and I have a few 
grade 12 bolts that also work well as raw material. I'm still cogitating on 
it, but the torx socket is the stronger of the two, and I think I can drill 
that with pcb bits on my mill.   The smaller end is already fixed at 10-32 
by drilling and tapping the end of the ball screw.  The larger end I may 
make metric at about 7mm as my access through hole in the extension is 
already .247 (6.2738mm).  Due to wall thickness vs strength 
considerations, that thread will have to be cut from the tapered socket end 
anyway.  That tap I have.  Match fitting the screw with G76 is fairly 
trivial for both thread sections.

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)
My web page: http://coyoteden.dyndns-free.com:85/gene is up!
42

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Re: [Emc-users] long set screw

2012-07-16 Thread Kenneth Lerman
Hi Gene,

McMaster has long set screws -- sort of.

They have swivel pad set screws --

Steel 10 Degree Swivel Pad Set Screw for Angled Surfaces, 1/4-20 
Thread, 3-3/8 Length

Regards,

Ken


On 7/16/2012 5:08 AM, Gene Heskett wrote:
 On Monday 16 July 2012 04:43:01 jeremy youngs did opine:

 Greetings all;
 This need for a long allen set screw as the starting material for
 this differential screw that Andy reminded me of is being a problem.
 fleabay searches don't seen to be getting any hits tonight.
 how long gene and what thread flavor? a piece of drill rod could be
 milled to make a broach, with pilot and steps cuti in a lathe then
 hadened and used in bridgeport to make the shaped hole? and you could
 use the same piece of drill rod as your screw and neck it slightly for
 a ways so as to leesen the likely ]hood of it breaking just thoughts
 Any 'thought' may contain the seeds of a solution idea, thanks.

 I have a couple sticks of 1/2 drill rod for raw material, and I have a few
 grade 12 bolts that also work well as raw material. I'm still cogitating on
 it, but the torx socket is the stronger of the two, and I think I can drill
 that with pcb bits on my mill.   The smaller end is already fixed at 10-32
 by drilling and tapping the end of the ball screw.  The larger end I may
 make metric at about 7mm as my access through hole in the extension is
 already .247 (6.2738mm).  Due to wall thickness vs strength
 considerations, that thread will have to be cut from the tapered socket end
 anyway.  That tap I have.  Match fitting the screw with G76 is fairly
 trivial for both thread sections.

 Cheers, Gene


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Re: [Emc-users] long set screw

2012-07-16 Thread Gene Heskett
On Monday 16 July 2012 10:16:16 Kenneth Lerman did opine:

 Hi Gene,
 
 McMaster has long set screws -- sort of.
 
 They have swivel pad set screws --
 
 Steel 10 Degree Swivel Pad Set Screw for Angled Surfaces, 1/4-20
 Thread, 3-3/8 Length
 
 Regards,
 
 Ken
 
Chuckle, I'll bet its not cheap too.  But 1/4 isn't quite big enough for 
this.  But by the time I can get it, I can probably make it, so that is 
what I'll likely do.  If the heat don't punch my ticket first, the telly is 
saying 95F and up today. :(

Thanks Kenneth

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)
My web page: http://coyoteden.dyndns-free.com:85/gene is up!
QOTD:
It seems to me that your antenna doesn't bring in too many
stations anymore.

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Re: [Emc-users] long set screw

2012-07-16 Thread andy pugh
On 16 July 2012 15:21, Gene Heskett ghesk...@wdtv.com wrote:

 Chuckle, I'll bet its not cheap too.  But 1/4 isn't quite big enough for
 this.  But by the time I can get it, I can probably make it,

I have, in the past, made a similar thing (actually a screw for a
4-jaw chuck) by hammering a hex bit into an undersize-drilled hole,
then beating the whole thing with a hammer on an anvil until the hole
was hexagonal and the key would come out. Circularity was restored on
the lathe later.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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Re: [Emc-users] long set screw

2012-07-16 Thread Gene Heskett
On Monday 16 July 2012 10:57:21 andy pugh did opine:

 On 16 July 2012 15:21, Gene Heskett ghesk...@wdtv.com wrote:
  Chuckle, I'll bet its not cheap too.  But 1/4 isn't quite big enough
  for this.  But by the time I can get it, I can probably make it,
 
 I have, in the past, made a similar thing (actually a screw for a
 4-jaw chuck) by hammering a hex bit into an undersize-drilled hole,
 then beating the whole thing with a hammer on an anvil until the hole
 was hexagonal and the key would come out. Circularity was restored on
 the lathe later.

All of which proves that without us makers, the rest of the world will 
descend into the stone age in 200 years.  They may anyway, but thats 
another thread in history's endless loop. :(

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)
My web page: http://coyoteden.dyndns-free.com:85/gene is up!
The hardest thing is to disguise your feelings when you put a lot of
relatives on the train for home.

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Re: [Emc-users] long set screw

2012-07-16 Thread Jon Elson
Gene Heskett wrote:
 All of which proves that without us makers, the rest of the world will 
 descend into the stone age in 200 years.  They may anyway, but thats 
 another thread in history's endless loop. :(
   
200 years?  Come on, it wouldn't take TWO years for everything to come 
to a stop!

Jon

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Re: [Emc-users] long set screw

2012-07-16 Thread mark center
I had a job making hex adjusters for camshaft timing pulley's for
Cloyes gear. I needed to make about 2000 a week. First, I tried
broaching. It was labor intensive and expensive because broaches kept
breaking. I devised a roto-broaching tool. An axial hex cutter mounted
in bearings angled about 5 degree from centerline. I hated that job.
It sucked all my fun for a couple of years making less than minimum
wage. It was an education.

Mark Center

On Mon, Jul 16, 2012 at 12:28 PM, Jon Elson el...@pico-systems.com wrote:
 Gene Heskett wrote:
 All of which proves that without us makers, the rest of the world will
 descend into the stone age in 200 years.  They may anyway, but thats
 another thread in history's endless loop. :(

 200 years?  Come on, it wouldn't take TWO years for everything to come
 to a stop!

 Jon

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Re: [Emc-users] long set screw

2012-07-16 Thread andy pugh
On 16 July 2012 18:52, mark center mcen...@gmail.com wrote:

 I devised a roto-broaching tool. An axial hex cutter mounted
 in bearings angled about 5 degree from centreline.

I have seen those on YouTube.

There is a LinuxCNC way to do it too:
http://youtu.be/T4q8gCpeY1A

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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[Emc-users] long set screw

2012-07-15 Thread jeremy youngs
On Sun, Jul 15, 2012 at 11:47 PM,
emc-users-requ...@lists.sourceforge.netwrote:

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 Today's Topics:

1. Bouncing ideas, not encoder related, off you folks :)
   (Gene Heskett)
2. Re: Spindle hooked to dc servo amp (Jon Elson)
3. Re: Spindle hooked to dc servo amp (Jon Elson)
4. Re: Spindle hooked to dc servo amp (Peter C. Wallace)
5. Re: Spindle hooked to dc servo amp (Jon Elson)
6. Re: Spindle hooked to dc servo amp (Jon Elson)
7. Re: Spindle hooked to dc servo amp (Jon Elson)


 --

 Message: 1
 Date: Sun, 15 Jul 2012 23:21:03 -0400
 From: Gene Heskett ghesk...@wdtv.com
 Subject: [Emc-users] Bouncing ideas, not encoder related, off you
 folks :)
 To: 'Enhanced Machine Controller \(EMC\)'
 emc-users@lists.sourceforge.net
 Message-ID: 201207152321.28902.ghesk...@wdtv.com
 Content-Type: text/plain;  charset=us-ascii

 Greetings all;
 This need for a long allen set screw as the starting material for this
 differential screw that Andy reminded me of is being a problem.  fleabay
 searches don't seen to be getting any hits tonight.


how long gene and what thread flavor? a piece of drill rod could be milled
to make a broach, with pilot and steps cuti in a lathe then hadened and
used in bridgeport to make the shaped hole? and you could use the same
piece of drill rod as your screw and neck it slightly for a ways so as to
leesen the likely ]hood of it breaking just thoughts
--
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threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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