Primitive Jacot tool?

[Al J]

I picked up some things from the estate of a retired watchmaker, and this tool was in the lot:



Another view:



It sort of resembles a very small and crude Jacot tool, but curious if anyone could confirm. No markings on the case, but there are three letters stamped on the side of the tool "CWZ"...

If anyone has an idea of what this is, I would appreciate hearing back thanks.

Cheers, Al

 

[gmorse]

Hi Al,

Not a Jacot but a re-pivoting tool. The set of female cone centres of graduated sizes each has a hole through the middle. The cones locate the end of the arbor and the holes locate the drills and keep them centralised. The runner on the other end has a safety centre to protect the pivot on the 'good' end of the arbor and the loose pulley on it with two prongs engages with the wheel on the arbor and drives it, with a bow. These pictures are of a simpler, slightly different design but it works in exactly the same way.



Regards,

Graham

 

[Al J]

Thanks Graham!

I've wanted to do some repivoting, but my lathe's tailstock doesn't line up well with the headstock, so this may be a tool I end up using...my Jacot tool uses the spring loaded drum, so I'll have to make myself a bow if I want to try this out.

In your experience, do these do a good job keeping the pivot centered?

Cheers, Al

 

[gmorse]

Hi Al,

In your experience, do these do a good job keeping the pivot centered?

If the female centre is chosen to fit both the arbor and more importantly, the size of drill you intend to use with it, it will produce quite good results. These tools occasionally still have some drills, (stored under that knurled screw at bottom right), and also the drill holder, which I can't see in your picture. You'll probably need to make the holder and some drills.

Regards,

Graham

 

[Al J]

Thanks again Graham!

 

[praezis]

I have both types, but never used them. Disadvantage imho: you cannot see the drill and chips.

Frank

 

[DeweyC]

I asked my instructor in Neuchtel how to use the pivoting attachment for the Horia (same concept). He laughed and said no one knows how they work. Explains why they are always in NOS condition.

 

[karlmansson]

I always seem to get five or so of those tools in every batch of old tools I find. Almost regardless of the size of the batch! Never used it though, I use the cone disc on my 6mm Lorch D-bed lathe instead.

 

[measuretwice]

I asked my instructor in Neuchtel how to use the pivoting attachment for the Horia (same concept). He laughed and said no one knows how they work.

thats funny.....full marks for honesty!