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This Is A Beauty. J.sewill Pocket Watch.

Mark
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Mark Distinguished Member

Mark

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This came in with a broken staff. Somebody had already removed the broken piece which is now lost so it will be a small challenge as I usually use the old staff as a guide.

 

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Mark Distinguished Member

Mark

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Excellent, I re-pivoted a Goliath watch a couple of months back and it was a right fiddly affair.

Are you going to make a video of the manufacture?

 

Not on this occasion as I don't have long to complete the job. I will take some pics though.

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DJW Super WRT Addict

DJW

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Is this strictly a "Time of Day" watch, Mark? There's an awful lot of extra gears and stuff on this thing! I'm also curious on the sub seconds chapter position on the dial.

 

I think it is truly a fascinating timepiece!

 

Thanks for sharing...

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Geo Distinguished Member

Geo

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Did you use a carbide spade drill?

I use a 0.5mm solid carbide twist drill, it was like mating hedgehogs. The pinion was 1.96mm long x 0.5mm diameter reduced to 0.14mm diameter x 0.5mm long to fit the jewel.

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Mark Distinguished Member

Mark

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I use a 0.5mm solid carbide twist drill, it was like mating hedgehogs. The pinion was 1.96mm long x 0.5mm diameter reduced to 0.14mm diameter x 0.5mm long to fit the jewel.

 

Finding the centre has to be the trickiest part!

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Geo Distinguished Member

Geo

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Finding the centre has to be the trickiest part!

I squared off the end of the shaft in my lathe using a carbide lathe tool the using the same tool dished the end of the shaft. I then spotted the end with a 1mm carbide drill before using the 0.5 drill.

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Mark Distinguished Member

Mark

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More pics:

 

Removed a lot of material before parting off:

 

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Trying the roller for size:

 

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Now using a pivot file to fine tune the taper so that the roller will fit snug:

 

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Now I have my roughed out piece I can start polishing and grinding the pivots down to size. Lower pivot is about double what I need in length as I do not know how long it should be yet:

 

post-1-0-35227900-1396360390_thumb.jpg

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Mark Distinguished Member

Mark

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Looking good. Finished today or tomorrow?

Not today. I have to strip the watch and service it.

 

Wrapping it up for today. Heres a couple more pics.

 

I'v mounted the staff on the wheel so that I can use the Jacot tool. Grinding the pivots to size with my pivot file:

 

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I'm about half way there:

 

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