Broken mainspring

[HectorLooi]

I received a Vostok Komandirskie in the mail last week. It's a non working watch with many minor issues. But for today, I'll just talk about the broken mainspring.

I have a spot welding machine, so repairing a broken endpiece like this is relatively easy for me. I just clean up the pieces and clamp them between the spring loaded jaws of my spot welder and hit the switch.

But if a spot welder is not available, what other methods would be used to repair a broken tail?

[Nucejoe]

Forget the old broken spindle piece, heat end of the spring to a glow to bend a 90 degrees reheat to continue bending to 180 degrees, quench in old automotive oil. You have a one piece spring with a bend that functions and lasts longer than the original spindle. 

[Klassiker]

Riveting works too.

[Franktimex]

On 2/8/2021 at 10:40 AM, Nucejoe said:

Forget the old broken spindle piece, heat end of the spring to a glow to bend a 90 degrees reheat to continue bending to 180 degrees, quench in old automotive oil. You have a one piece spring with a bend that functions and lasts longer than the original spindle. 

Works like a charm