Sourcing a replacement abor, wheel, pivot

[caseback]

22 minutes ago, Neverenoughwatches said:

Could pinion wire be made to fit if the correct size is available..then drill out the wire ?

Something new to learn every day. I didn't know this existed! Available in brass as well. Well worth a try I would say.

[Neverenoughwatches]

24 minutes ago, caseback said:

Something new to learn every day. I didn't know this existed! Available in brass as well. Well worth a try I would say.

Yes clock pinion wire is also in brass.

[oldhippy]

This can be made and it is not a problem. Get hold of one of these mags and look at the adds and you will find clockmakers who make parts. 

http://www.clocksmagazine.com/

The reason I missed this is because the heading didn't mention clock. 

Brass pinion wire is too soft. 

Edited October 26, 2024 by oldhippy

[Neverenoughwatches]

How standard would the modules have been on pinion leafs when this was made ?

[oldhippy]

Depends on the age of the movement. Early ones were all hand made right down to the screws. Even the later ones you can't just take a wheel from one and put it in another. 

[rjenkinsgb]

2 hours ago, oldhippy said:

Depends on the age of the movement. Early ones were all hand made right down to the screws. Even the later ones you can't just take a wheel from one and put it in another. 

I totally agree that a finding a complete, identical wheel and pinion has about the same probability as winning the lottery jackpot!

 

From an engineering point of view, though, old movements like that do have the advantage that the gears are not a precise constant-contact involute profile like modern gears .

The old ones have simple teeth with parallel sides and rounded ends, so as long as a replacement pinion has a decent engagement depth without binding, the exact tooth profile is not really critical.

Pretty much, it needs to be the same size as the original, measured across two opposing teeth, & it should work fine.

 

[CYCLOPS]

this might can be straightened and repivoted, one just needs the ways and means......or a competent clockmaker

[Neverenoughwatches]

On 10/26/2024 at 11:11 AM, oldhippy said:

Depends on the age of the movement. Early ones were all hand made right down to the screws. Even the later ones you can't just take a wheel from one and put it in another. 

I was more meaning the pinions OH, surely would they have been cut from standard stock...starting from circa ?

On 10/26/2024 at 1:59 PM, rjenkinsgb said:

I totally agree that a finding a complete, identical wheel and pinion has about the same probability as winning the lottery jackpot!

 

From an engineering point of view, though, old movements like that do have the advantage that the gears are not a precise constant-contact involute profile like modern gears .

The old ones have simple teeth with parallel sides and rounded ends, so as long as a replacement pinion has a decent engagement depth without binding, the exact tooth profile is not really critical.

Pretty much, it needs to be the same size as the original, measured across two opposing teeth, & it should work fine.

 

I also thought that Rob and pinion profiles must have been standardised at some point in time.

13 minutes ago, CYCLOPS said:

this might can be straightened and repivoted, one just needs the ways and means......or a competent clockmaker

Its the pinion thats broken Cyclops

[oldhippy]

Yes the later you go the more machines came in to do the work. They were all checked and finished by hand a sort of quality control and they took pride in there work. Unlike today most couldn't give a hoot as long as they get paid.  

[CYCLOPS]

I thought the arbor was bent and the pivot broken.....

[Neverenoughwatches]

1 hour ago, CYCLOPS said:

I thought the arbor was bent and the pivot broken.....

The OP's part names were astray , its a pinion leaf that has broken off. 

[CYCLOPS]

my eyes didn't catch that,  that's definitely a tougher task, hopefully a donor can be sought....