Dissassembly of an Antique Brass Lens

[Drew Bedo]

I have acquired an antique brass lens, without lens elements, for parts. The hood unscrews easily. I am looking to remove the flange for use with another lens. It is stuck. I have used hand strength without movement of any kind. I have used a flange wrench with no luck either. I am afraid to use much more force.

Any tips or suggestions on how to remove this flange without damaging the flange or the lens barrel?

[Tin Can]

some glue threads

heat the flange

ice the body

[Drew Bedo]

TC: Thanks.

[Mark Sawyer]

I'd run some penetrating oil into the threads and let it sit a few hours.

[Tin Can]

Better

I'd run some penetrating oil into the threads and let it sit a few hours.

[Tin Can]

I used to freeze parts in -25F dunk tank

and torch flywheel gears

fall a part

[Drew Bedo]

But this is brass . . .

I'll try the penetrating oil followed by freezing the body with "canned air" and heat the flange with a small soldering iron.

[Greg]

I highly recommend:
Blaster Corp 16-PB-DS Blaster Penetrating Catalyst
A car restorer recommended it to me as being a superior alternative to common "penetrating oil"... I tried it and he was right.

[Jody_S]

If there's no glass then heat the whole thing in the oven to loosen any old grease or threadlocker.

[Mark Sawyer]

I highly recommend:
Blaster Corp 16-PB-DS Blaster Penetrating Catalyst
A car restorer recommended it to me as being a superior alternative to common "penetrating oil"... I tried it and he was right.

That's what I use. It's still a petroleum-based penetrating oil, but with some "enhancements" like naphtha, so use it outside.