Is it possible to straighten this pivot?

[Bill2024]

The pivot on this fourth wheel is bent and I was wondering if there is any way to straighten it?

Full disclosure - I think I did this taking it apart when I caught it on the movement holder when turning the movement over  

The movement does run, and it is possible to fit the seconds hand, but I imagine this is going to create all kinds of friction in the movement.

The fourth wheel is not jewelled on this movement. 

[AndyGSi]

First question would be could you get a replacement if it snapped?

Yes you should be able to straighten it but need to be careful.

I've found the best way is with a long piece of tube having a similar I/D to the O/D of the pivot.

[Bill2024]

1 hour ago, AndyGSi said:

 

First question would be could you get a replacement if it snapped?

 

Probably - the movement is an old Oris 581 kif, so not rare or valuable, but I must say don’t see many of these on eBay. I see lots of other vintage oris calibres but I don’t know if any of the parts would be compatible.

Is it possible to look up which Oris movements might have a compatible fourth wheel anywhere?

1 hour ago, AndyGSi said:

Yes you should be able to straighten it but need to be careful.

I've found the best way is with a long piece of tube having a similar I/D to the O/D of the pivot.

Thanks I think it’s worth a try. Can you suggest what type of tube might be useful for doing this?  I thought about trying a pin vice but that seems a bit clumsy. 

[VWatchie]

17 minutes ago, Bill2024 said:

Is it possible to look up which Oris movements might have a compatible fourth wheel anywhere?

I just had a look w/o luck...

Here's a decent database too: https://www.emmywatch.com/db/movement/oris--581/

Edited 2 hours ago by VWatchie

[Mark]

Its risky but sometimes do-able.

I showed a technique in one of my old videos...

Go to 0:46 (46 seconds in)..

Be very careful

Hope that helps.

[AndyGSi]

They're available from Cousins but appear to be a one movement only part.

I've got a selection of stainless steel tube.

You'll also need to support the other part of the shaft to make sure you're only bending the pinion.