Steve, I got to thinking, what about using a CO2 laser... http://www.spectrumtech.com/product-groups/wire-stripping-systems Maybe just a bit too large? Bob -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Yuan-chia Joyce Koo Sent: Thursday, July 17, 2014 5:51 PM To: [log in to unmask] Subject: Re: [TN] Removing insulation from inductor wire.. Steve, try this mask with carbon insert. it works wonder to filter the smoke, smell. it is better than the hog nose type... ;-). http://www.amazon.com/Can-Breathe-Masks-Honeycomb-Carbon/dp/ B0016IM7KQ/ref=pd_sxp_f_pt jk On Jul 17, 2014, at 1:46 PM, Steve Gregory wrote: > Hi All! > > I'm trying to deal with all the smoke that's here in Boise today, it's > probably the worst smoke I've ever been in. The jet stream has made a > dip and is carrying all the smoke from the fires in Washington, > Oregon, and the fire north of us in Boise county right into the > Treasure Valley and it's all packing up against the mountains to the > west of us (cough, > cough..) > > Anyways, I have a question about a little custom inductor from Vishay > Hirel that we have here. It appears that we have a certain datecode > batch of these where the insulation on the part of the wire that gets > soldered into the board wasn't stripped and tinned high enough, and > now when we try to install them into the board the insulation prevents > wetting at the top of the board and we have insulation in the solder > joint which of course is a > defect: > > http://stevezeva.homestead.com/Vishay_Inductor.jpg > > The picture is of one that we pulled out of a board, and you can see > that the insulation goes down past the shoulders and into what is > supposed to be the solderable area. > > I think I know the answer to my next question, but I'll ask it anyway. > Is there any clever way to remove that insulation without damaging the > inductor? The picture makes this inductor look huge, but it's not, > it's maybe .250" in diameter, and the wire is a pretty small gage too. > > I tried dipping it first in a lead-free tinning pot set at 600 C., no > luck, then 700 C., no luck, then 800 C., and no luck. I was able to > darken the insulation and melt the yellow tape that wraps the > inductor, but that's about it. I'm think that the only way to remove > this insulation is mechanically...which will be a trick because the > inductor and wire is pretty small. > > Hate to scrap these things because they are long lead custom > inductors. But we can't use them like they are.... > > Steve > > -- > > > This email and any attachments are only for use by the intended > recipient(s) and may contain legally privileged, confidential, > proprietary or otherwise private information. Any unauthorized use, > reproduction, dissemination, distribution or other disclosure of the > contents of this e-mail or its attachments is strictly prohibited. If > you have received this email in error, please notify the sender > immediately and delete the original. > > > ______________________________________________________________________ > 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] ______________________________________________________________________