Tough removal of brass lens

[Jon Wilson]

The brass lens cells on my old petzval are difficult to thread and unthread on and off the brass barrel. The threads are not crossed. What is recommended to help smooth the screwing on and off these lens? Graphite?
Thank you for your help.
Jon

[Tin Can]

I have the opposite problem

Let's use one thread

Mine is too loose and needs something

[Jon Wilson]

makes sense. Thanks. Let's hear from all the LF gurus.

[Two23]

Try cleaning them with lighter fluid and tissue, then dry. I've put a thin coating of anti seize white grease on all my threads.


Kent in SD

[paulbarden]

Clean the threads with Naphtha and a Q-tip, then dust lightly with graphite, brush off excess.

[diversey]

Clean threads with mouse oil and get rid of all dirts. Put a tiny bit of silicone grease.

[diversey]

If too loose, put some Teflon tape on the threads :o

[Tin Can]

Good idea David!

I am looking for my thin teflon tape, a roll I tested on Instron (https://instron.us/) 52 years ago, it is the best Teflon tape I ever used

I have many others

Once used to tighten I hope to never loosen that rare lens again

Super Glue is the asshole answer, I would need to attach a note to lens to carefully use heat

or low temp solder....

I am seeking other answers here and now

Tomorrow the custom Zimba lensboard for it arrives




If too loose, put some Teflon tape on the threads :o

[Jon Wilson]

Thank you for your great responses. I tried the "Q-tip with lighter fluid" on the threads of my old Leclair Petzval and it worked wonderfully.
Best to all,
Jon