German 3.7 cm Flak case restoration

[Biber2112]

Hi Folks

I'm restoring a 1939 3.7 cm flak round and I'm looking for a good solution the neck the brass back down closer to 37mm without damaging the patina. Any suggestions would be most appreciated.








Cheers

 

[kiwieod]

i have seen a tool for tapering exhaust pipe joints and it has an internal cone which you may be able to gently reset the neck
any other method,heat,hammering,lathe is going to remove the patina

 

[CPCOrd]

If you have a large anvil with a point you can lightly tap it flat with a brass or plastic mallet.

 

[cwo4670a]

If you have a large anvil with a point you can lightly tap it flat with a brass or plastic mallet.

I have done this many times, I have the tools to do the work. Can do it for you for 20.00 plus postage. Joe gatz

 

[chispa]

Hi, if you haven't been able to get it by other means, maybe this could help you, protecting your mouth.
adjustable clamp