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September 2010

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Subject:
From:
John Burke <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, John Burke <[log in to unmask]>
Date:
Wed, 1 Sep 2010 15:02:12 -0700
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text/plain (199 lines)
Speaking of probability....

If they are breaking many .125 drills don't bother getting circuit boards
made there......8-) Imagine the attrition rate of the 0.006 mil drills

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey (EHCOE)
Sent: Wednesday, September 01, 2010 11:55 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Indexing Pins / PWB Coupon pins

So you're relying on twists of fate.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Wednesday, September 01, 2010 10:59 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Indexing Pins / PWB Coupon pins

talk to a PCB fab shop -- if you can live with .125" mounting holes you 
should be able to get boxloads of broken or spend drills...




Chris Mahanna <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
09/01/2010 01:53 PM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Chris Mahanna <[log in to unmask]>


To
[log in to unmask]
cc

Subject
Re: [TN] PCB Indexing Pins / PWB Coupon pins






Dear X,
What sizes?  How many do you need?  If you're looking for a small
quantity 
of cut pins, forget it.  Go to smallparts.com order SS precision
machined 
stock (it's cheaper that music wire, go figure).  Use a diamond cutoff 
wheel to cut them and then debur.  Tumble debur does not work well with 
the cut ss.  We use SiC grind.
The IPC A/B-R Standard is 2mm drill, 0.078" pin stock.  This yields a
slip 
fit that works for your smallest laser blinds.

Oh ya, Louis and Tom - I never replied about the brilliance of the
A/B-R. 
I was hoping that you would just catch the infomercial.  It's on at 2am 
(Spike channel, of course).  Or you can come to the 1-10C meeting. Keep
in 
mind that according to our chairman, the design is finalized until 2221 
Appendix A amendment 1 (by my calculations, 2015).

X2


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Wednesday, September 01, 2010 1:19 PM
To: [log in to unmask]
Subject: [TN] PCB Indexing Pins / PWB Coupon pins
Importance: High

Fellow TechNetters:

   I am searching for an assortment of the above stated pins, not in
large 
quantities at this time.   We are conducting Thermal Stress on Plated 
Through Hole without an expensive tooling machine.   I am currently 
working with 0.019 thru 0.042 thousand finish hole sizes.   I need to
pin 
several coupons on one mount.   I don't need precisions pin as they are 
discarded after use.

Any ideas, comments/suggestions.

 Victor,

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