Steve,

Could it be they build the prototypes with HASL finish, and your production units are ENIG. Big difference in insertion force since you're trying to put a 0.044" part into a 0.041" hole.

Ed Popielarski
Engineering Manager


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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, May 09, 2017 12:08 PM
To: [log in to unmask]
Subject: [TN] Holtite socket receptacle insertion

Hi All,

We just had a customer revise an assembly with us and have chosen to use some Holtite sockets for a through-hole photo diode on the assembly.

http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=114-13033&DocType=SS&DocLang=EN

The board is really small, about 1" square and .062" thick. It also has double sided SMT on it, so there's not much room around the holes. I say that because from what I remember when I last used these sockets, is that we used a hand tool that was more like a spring loaded center punch (it's on page 6 in the PDF above) that has different tips that you changed out depending on what part number socket you were inserting, and it took a surprising amount of force to seat these sockets. Of course the tool is close to $300, and I'm thinking we'll need a press fit fixture to support the PCB when we install them because the board is only .062" thick. But our customer says they built some proto assemblies with these sockets and was able to press them in with their finger nail, does that sound right? I'm thinking that the holes were probably oversized and they aren't getting the kind of connection between the socket and barrel that they need to be getting to have any sort of reliability.

Is my memory getting that fuzzy?

Steve

--
Steve Gregory
Kimco Design and Manufacturing
Process Engineer
(208) 322-0500 Ext. -3133

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