Struggles with a stuck flathead screw on a Voigtlander Bessa 66 (Baby Bessa) - Penetrating oil not working

It

bernard_L said:

Strange, here (France) when I click on the link (to amazon UK) in my post, it just works.
Anyway, look on Amazon or elsewhere for:

Owatrol Transyl ATO Multi Purpose Lubricant Rust Remover​

Disclaimer: I am in no way affiliated with the supplier of this product.

Click to expand...

works fine here in England as well.

Why do I think an impact wrench is a really bad idea?

Maybe there's an itsy bitsy one on the market but the common ones need a pretty good whack with a beaten' tool

Do you know how long this fastener is?
Maybe another Bessa user could find out?

John Koehrer said:

Why do I think an impact wrench is a really bad idea?

Maybe there's an itsy bitsy one on the market but the common ones need a pretty good whack with a beaten' tool

Click to expand...

My reaction as well.

Aeons ago, in a moment of desperation, I released a stuck screw from a dewar body by heating the dewar gently, to about 200F as I recall, and by keeping a chunk of dry ice in contact with the screw head. After an arbitrary interval - but one that seemed long enough for the screw head to have established a significantly different temperature than the dewar, if it was ever going to - an orbital sander was held in contact with the shaft of a screw driver that tightly fit the stuck screw's slot. With a lot of downward and rotational force applied, the screw came loose. Three sets of hands were involved: holding the dewar, holding the sander to the screwdriver shaft, and handling the screwdriver.

I'm not sure a camera body would withstand the same amount of downward pressure that the dewar did, but by coupling a heat differential and vibration, maybe something good will happen.

Acetone seems good to me too.

Good luck!