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Stripping Nikkor 43-86mm stuck glasses

Started Feb 2, 2022 | Discussions thread
ProfHankD
ProfHankD Veteran Member • Posts: 9,147
Re: Stripping Nikkor 43-86mm stuck glasses

sssboa wrote:

Hi

So I am stripping Nikkor 43-86mm. the threaded rings are really stuck. I used a release fluid like for stuck screws on one and it worked. But nothing works on this. Any idea?

I got stuck on this stuck ring You can see that I have tried

Ouch!

There is a slim chance some idiot glued it with loctite. In any case, the best way I can think of is to try a mild thermal shock to break whatever bond is holding it. For that, just let a hair drier heat it up a bit and then try as it's cooling. You can even do a bit more by heating and then using ice in a plastic bag held against the metal plate to try to get it to shrink a bit, but too much thermal shock can damage things (i.e., crack a lens element).

I suppose there is also a tiny possibility that it is a reverse threaded part: i.e., righty-loosey rather than lefty-loosey.

In any case, don't force it.

There are options like trying to get a touch of WD40 to the thread, but that can easily cause more problems because you don't want WD40 getting spread around inside a lens.

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