Cannon pinion

[demewill]

I am uncertain about supporting the bottom center wheel pinion while installing the cannon pinion when assembling a watch. What are the recommende methods or techniques to prevent damage to the bushing or jewel? I have an assortment of movement holders, but none of them provide support for this pinion.
Thanks,
Dan

[randy]

Hi Dan,
Usually you would use a stump in a staking set specifically designed for the job.

Others here may have another work around tool idea if you don’t have a staking set

Best

Randy

[demewill]

Thanks Randy. I should have thought to use the staking set. I just put your advice to good use on my latest eBay “score”. It worked so easy.
Dan

[david pierce]

Dan,
If you have an INVERTO design staking set it makes it more convient to find a stake more suited to that operation. If not and you have a lathe, you can custom make a suitable stump. The factory stakes are heat treated but if you make a stump for a particular operation it does not need to be hard. Brass would work fine.
david

[demewill]

David,

One of the reason I got back into watch repair is to buy and make more tools. At least that is what an outsider would think. I have made a few tools to support this habbit and fortunately I have the machines from my previous hobbies. I have only made one stake thus far and that was to push out the pins in a watch band to adjust the length. I have also made a pallet stone warmer to fix a pallet fork with a floating jewel. What I have learned from this is that the highly refined shelac does not melt very well. I had some super blond shelac and when I tried melting it it just turned into a sticky froth.
I have turned a few plastic support platforms that I use on the bench when working on balance wheels and other small parts. It occurred to me today that it might be fun to make a hairspring platform out of an opaque plastic and light it from below (My eyes are not what they used to be). I’ll let you know if that works out.

Thanks for the tips.

Dan

[randy]

@demewill wrote:

Thanks Randy. I should have thought to use the staking set. I just put your advice to good use on my latest eBay “score”. It worked so easy.
Dan

Glad to hear you worked it out !!

Take care,

Randy

[arutha]

A very useful tool which is easy to make is a home made pallet warmer but it has other uses too! Just get an old scrap brass pocket watch plate and silver solder a brass rod handle on to it. The beauty of it is you can drill and tap holes in it to hold things in place while you work on them, make cut outs where you want and it works great as a pallet warmer.
Paul.

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