Help with Hairspring

[adamselene]

Before I end up mangling this hairspring, can anyone tell me how to remove the hairspring stud from the bridge?  I see how to remove it from the regulating pin but the stud seems to be in there good with no screw or other securing mechanism that i can see.   The object of all this is to replace the staff which has a broken pivot.  

[Chopin]

Could it be friction fit ? Just a guess...

[oldhippy]

You could try your tweezers under the pin and leaver it away, be very careful, as you do not want to damage anything.   If it will not come away from the balance cock, just un-pin the h/s from the stud.

[clockboy]

I would follow oldbippy's advise but you will have to be very, very  carful one slip and the hairspring will be damaged. As a matter of interest why are you removing it. When I come across one of these set ups I only remove as a last resort. I clean/soak as a whole unit then thoroughly dry. Then I lubricate the cap jewel with a auto oiler. 

[oldhippy]

27 minutes ago, clockboy said:

I would follow oldbippy's advise but you will have to be very, very  carful one slip and the hairspring will be damaged. As a matter of interest why are you removing it. When I come across one of these set ups I only remove as a last resort. I clean/soak as a whole unit then thoroughly dry. Then I lubricate the cap jewel with a auto oiler. 

The balance staff has broken.

[praezis]

Levering from below is dangerous!

All cylinder PW have such a friction fit stud. They are pushed out from above, there are special pliers with a pin in upper part and a gap in lower part.

Frank

[oldhippy]

5 minutes ago, praezis said:

Levering from below is dangerous!

All cylinder PW have such a friction fit stud. They are pushed out from above, there are special pliers with a pin in upper part and a gap in lower part.

Frank

This isn't a cylinder.

[adamselene]

Thanks for the replies. I remonted it on the movement and used a stake to loosen the stud and the used an oiler to push it out the rest of the way. All is good for now. Thanks 

Edited October 25, 2017 by adamselene

[anilv]

I see a Heinlein fan... love his books!

[praezis]

On 24.10.2017 at 11:06 AM, oldhippy said:

This isn't a cylinder.

Hi oldhippy,

of course, it is apparent. What I wanted to say: Such studs are not exotic but well known (if cylinder watches are...)

Frank

[adamselene]

On 10/24/2017 at 8:28 PM, anilv said:

I see a Heinlein fan... love his books!

You’re on to me.