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Re: impossible stud

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On Tue, 24 Apr 2018 06:55:34 -0700, John Larkin wrote:

> On Tue, 24 Apr 2018 09:10:45 -0400, Spehro Pefhany
> <speffSNIP@interlogDOTyou.knowwhat> wrote:
> 
>>On Thu, 19 Apr 2018 20:51:20 -0700, John Larkin
>><jjlarkin@highlandtechnology.com> wrote:
>>
>>>I want a lot of these:
>>>
>>>https://www.dropbox.com/s/dmj4vff7mnldrcs/Impossible_Stud.JPG?raw=1
>>>
>>>It probably doesn't exist. Maybe a Swiss screw machine company could
>>>make us a bucket full of these.
>>>
>>>Six of these would press into a small PCB, which could then be bolted
>>>onto the bottom of a bigger PCB.
>>
>>Tolerances on the part vs. staking die and forces on the part look
>>iffy. Normal clearance hole for 0-80 is 0.073. You definitely want the
>>disk deburred on the bottom or it won't sit flat, and if the top has a
>>similar fillet it will tend to extrude into the die. 
>>
>>Might it be easier to make a plated part and solder it in? 
>>
>>--sp 
> 
> The screw machine people would prefer to make a solderable part and
> not knurl something that small. That's OK with us... pressing in a
> part is about as much hassle as soldering.
> 
> I'm trying to talk my manufacturing people into attaching the baby
> board with six nuts; they prefer to plug pins into pin sockets. I'm
> looking at 3 or 4 amps peak per pin with nanosecond rise times, which
> is terrifying, to me, for small pin sockets.

If you want to go pin/socket try the mill-max pin receptacle.

https://www.mill-max.com/products/rec/9184

is rated at 8 amps with a .040 to .050 pin.  I've used a bunch
of these in the past (smaller .025 pin size) and no problems.

Not sure what they will do to your rise times.  Get a few samples
and test.

-- 
Chisolm
Republic of Texas

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impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-19 20:51 -0700
  Re: impossible stud Perry <Perry@null.com> - 2018-04-20 12:41 +0800
    Re: impossible stud Perry <Perry@null.com> - 2018-04-20 12:47 +0800
    Re: impossible stud TTman <kraken.sankey@gmail.com> - 2018-04-20 11:13 +0100
    Re: impossible stud George Herold <gherold@teachspin.com> - 2018-04-20 06:10 -0700
      Re: impossible stud gnuarm.deletethisbit@gmail.com - 2018-04-20 22:29 -0700
  Re: impossible stud "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-04-20 02:07 -0500
    Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-20 07:14 -0700
  Re: impossible stud Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2018-04-20 08:41 +0100
    Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-20 07:22 -0700
      Re: impossible stud tabbypurr@gmail.com - 2018-04-20 07:38 -0700
        Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-20 08:29 -0700
          Re: impossible stud "Carl Ijames" <carl.ijames@NOverizon.net> - 2018-04-20 11:50 -0400
            Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-20 09:41 -0700
              Re: impossible stud "Carl Ijames" <carl.ijames@NOverizon.net> - 2018-04-20 14:05 -0400
              Re: impossible stud whit3rd <whit3rd@gmail.com> - 2018-04-20 12:39 -0700
                Re: impossible stud John Larkin <jjlarkin@highland_snip_technology.com> - 2018-04-20 16:44 -0700
                Re: impossible stud George Herold <gherold@teachspin.com> - 2018-04-20 16:54 -0700
                Re: impossible stud John Larkin <jjlarkin@highland_snip_technology.com> - 2018-04-20 17:41 -0700
                Re: impossible stud George Herold <gherold@teachspin.com> - 2018-04-20 18:55 -0700
            Re: impossible stud Jeff Liebermann <jeffl@cruzio.com> - 2018-04-20 10:26 -0700
              Re: impossible stud John Larkin <jjlarkin@highland_snip_technology.com> - 2018-04-20 12:16 -0700
                Re: impossible stud Jeff Liebermann <jeffl@cruzio.com> - 2018-04-20 17:52 -0700
                Re: impossible stud piglet <erichpwagner@hotmail.com> - 2018-04-21 10:45 +0100
                Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-21 07:53 -0700
                Re: impossible stud Joseph Gwinn <joegwinn@comcast.net> - 2018-04-21 15:00 -0400
                Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-21 15:23 -0700
                Re: impossible stud Joseph Gwinn <joegwinn@comcast.net> - 2018-04-22 12:39 -0400
                Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-22 10:19 -0700
                Re: impossible stud Joseph Gwinn <joegwinn@comcast.net> - 2018-04-24 10:07 -0400
                Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-24 07:58 -0700
                Re: impossible stud Joseph Gwinn <joegwinn@comcast.net> - 2018-04-24 22:38 -0400
                Re: impossible stud John Larkin <jjlarkin@highland_snip_technology.com> - 2018-04-25 10:31 -0700
                Re: impossible stud gnuarm.deletethisbit@gmail.com - 2018-04-25 14:44 -0700
                Re: impossible stud Joe Chisolm <jchisolm6@earthlink.net> - 2018-04-21 14:44 -0500
                Re: impossible stud whit3rd <whit3rd@gmail.com> - 2018-04-21 14:11 -0700
                Re: impossible stud tabbypurr@gmail.com - 2018-04-21 03:18 -0700
                Re: impossible stud tabbypurr@gmail.com - 2018-04-21 03:34 -0700
          Re: impossible stud Joseph Gwinn <joegwinn@comcast.net> - 2018-04-20 12:41 -0400
          Re: impossible stud "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-04-20 20:35 -0500
          Re: impossible stud bill.sloman@ieee.org - 2018-04-20 19:00 -0700
  Re: impossible stud Jasen Betts <jasen@xnet.co.nz> - 2018-04-20 08:12 +0000
    Re: impossible stud Mike Perkins <spam@spam.com> - 2018-04-20 10:26 +0100
      Re: impossible stud "dcaster@krl.org" <dcaster@krl.org> - 2018-04-20 07:09 -0700
    Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-20 07:23 -0700
  Re: impossible stud Jeff Liebermann <jeffl@cruzio.com> - 2018-04-20 10:13 -0700
  Re: impossible stud Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-04-20 14:17 -0700
  Re: impossible stud Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2018-04-20 15:08 -0700
    Re: impossible stud John Larkin <jjlarkin@highland_snip_technology.com> - 2018-04-20 16:48 -0700
      Re: impossible stud Joe Chisolm <jchisolm6@earthlink.net> - 2018-04-20 23:17 -0500
  Re: impossible stud "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-04-20 20:20 -0500
  Re: impossible stud mickgeyver <alan.yeager.2013@gmail.com> - 2018-04-20 18:41 -0700
  Re: impossible stud Robert Baer <robertbaer@localnet.com> - 2018-04-21 00:53 -0700
  Re: impossible stud Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-04-21 13:06 -0700
    Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-21 15:29 -0700
      Re: impossible stud Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-04-21 15:46 -0700
  Re: impossible stud Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2018-04-24 09:10 -0400
    Re: impossible stud John Larkin <jjlarkin@highlandtechnology.com> - 2018-04-24 06:55 -0700
      Re: impossible stud Joe Chisolm <jchisolm6@earthlink.net> - 2018-04-24 11:00 -0500

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