http://www.te.com/content/dam/te-com/documents/automotive/global/whitepaper-pressfit-072014.pdf nano? > Sn63 HASL coating is the best finish, provided you are allowed to use it. > The lead is a lubricant. > No matter what the chosen finish is, the most important variable to > control is the finished hole size after plating and the tolerance. > The ability to perform the proper initial drill consistently and obtain > the initial hole size within a tight tolerance after drilling > (repeatability and control over drills), and obtain the final hole size > after plating varies from PWB fabricator to PWB fabricator. The selection > of the right fabricator is extremely important for PWBs that will use > press-fit or compliant-lead connectors. > The eyelid should be completely under the top surface of the hole. The > connector design controls the depth of the eye with respect to the shut > height of the connector, ie, if fully pressed in such that the insulators > or connector body are fully seated to the PWB surface, the eye should be > at least 95% fully into the hole. The ability to obtain that is affected > by the resistance variable, the amount the pin is allowed to bend upwards > during insertion, and this is an attribute of the press tooling and press > setup. The amount of resistance brings into play the finished hole size, > the surface hole finish, and how the stars line up on the day you decide > to press them in, and the relationship of the press operator's mother to > his/her father on the day of conception. So "Godd Luck" with that. > Odin > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Mattix, Dwight > Sent: Wednesday, April 13, 2016 11:59 AM > To: [log in to unmask] > Subject: Re: [TN] Press Fit Pins guideline, Second Time Around > > Realized long time ago, the only way out is to do your own due diligence. > Good luck with getting funds approved for your own reliability > demonstration, hole wall deformation x-section analysis and pin to pwb > insertion/retention force testing. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez > Sent: Wednesday, April 13, 2016 4:13 AM > To: [log in to unmask] > Subject: Re: [TN] Press Fit Pins guideline, Second Time Around > > I feel the pain...... There is not relief in sight..... > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Lum Wee Mei > Sent: Tuesday, April 12, 2016 7:26 PM > To: [log in to unmask] > Subject: Re: [TN] Press Fit Pins guideline, Second Time Around > > I have been asking the same questions even directly to the press-fit > manufacturer themselves and there is no conclusive answer. Except to drown > myself in the piles and piles of information from their website and often > end up going round and round. > > To quote from Gerry : " Godd hunting" > > Regards, > ~wee mei~ > ________________________________________ > From: TechNet [[log in to unmask]] on behalf of Gerry Gagnon > [[log in to unmask]] > Sent: Wednesday, April 13, 2016 1:55 AM > To: [log in to unmask] > Subject: Re: [TN] Press Fit Pins guideline, Second Time Around > > Hi Victor, > > Second time is the charm. > > Press fit pins are highly engineered and have many specifications > associated with them. > Each press pin manufacturer's design tends to be unique as a lot of them > are patented. > > The best answer to your questions is to tell you to find out the specific > press pin manufacturer's part number for the pin that you are dealing > with, go to their web site, and get the drawings and specifications for > the specific pin you want to know about. > > I think you will be surprised at the level of detail you will receive for > your questions plus the attributes you have not asked for ....... yet. > > Good hunting. > > Gerry > > ________________________________________ > From: TechNet on behalf of Victor Hernandez > Sent: Tuesday, April 12, 2016 11:59 AM > To: [log in to unmask] > Subject: Re: [TN] Press Fit Pins guideline, Second Time Around > > Fellow TechNetters: > > My initial inquiry, 2011, did NOT yield any useful information. Therefore, > I pose the same question again in hope that additional reader will provide > comments and/or their experience with Press Fit Pins. > I look forward to hear from the readers. > > What is the acceptable depth of the main eye lid with regards to total > board thickness? I have seen a variety of depths used. > What is the preferred raw board surface finish? Again, I have seen a > variety. > > Victor, > > From: Garcia, Rigo (GSFC-370.0)[ARES CORP] [mailto:[log in to unmask]] > Sent: Wednesday, January 27, 2016 11:28 AM > To: Hernandez, Victor G > Subject: RE: Press Fit Pins guideline > > Thanks! > > Rigo > > "The future belongs to those who believe in the beauty of their dreams" - > Eleanor Roosevelt > > From: [log in to unmask] [mailto:[log in to unmask]] > Sent: Wednesday, January 27, 2016 12:21 PM > To: Garcia, Rigo (GSFC-370.0)[ARES CORP] > Cc: [log in to unmask] > Subject: RE: Press Fit Pins guideline > > Rigo, > > I did NOT get any concrete guidelines and/or specification for Press Pin > Fit leads. The specs that are out there are confidential. > > Victor, > > -----Original Message----- > From: Garcia, Rigo (GSFC-370.0)[ARES CORP] [mailto:[log in to unmask]] > Sent: Wednesday, January 27, 2016 11:08 AM > To: Hernandez, Victor G > Subject: RE: Press Fit Pins guideline > > Hi Victor, > > Did you get an answer to your question? > > I'm interested because we are looking into qualifying press fit connectors > for flight hardware and don't know of any specs that provide requirements > for the process. > > Best regards, > > Rigo Garcia > > "The future belongs to those who believe in the beauty of their dreams" - > Eleanor Roosevelt > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez > Sent: Monday, January 25, 2016 1:40 PM > To: [log in to unmask] > Subject: [TN] Press Fit Pins guideline > > Fellow TechNetters: > > What is the current IPC guideline/specification for insertion depth of > Press Fit Pins. I aware that the Press Fit Pins configuration might vary a > little, just as well as board thickness. What is the acceptance criteria I > should look for visually and during x-ray imaging. > > Victor, > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________