Left handed lathes, okay, but collets too?

Betzel

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Dec 1, 2010
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Years ago, I found certain (Geneva, by Lorch and Wolf Jahn) lathes were designed "lefty" e.g. with headstocks on the right with the flat of the bar and screws, thumblocks, etc. facing away from the operator. Cross slides were not interchangeable, etc. Whether this was for left handed people, or using a hand-crank wheel with the right hand (or both) has been discussed and it all makes sense.

Most German made collets I have seen (which is not as many as some of you have, but still a lot) reads names correctly with the trumpet flare facing to the right of the operator. But, the other day, I saw this. My first. The word Lorch (etc.) may have been stamped on the collet face, but there were no images showing that. Have folks seen this? Often? Is this the kind of thing that may have accompanied those elaborate "lefty" boxed sets?

Always curious! TIA.

LeftyLorchCollet.jpg
 

wefalck

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Mar 29, 2011
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Never paid attention to this, but such collets were also used in the tailstock to the right ...

BTW, if you were to operate the lathe with the headstock to the right, as most German watchmakers seem to have done and many still do, you will definitely need the location pin in the spindle. Otherwise a chuck or collet may unscrew ...
 

karlmansson

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Apr 20, 2013
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Never paid attention to this, but such collets were also used in the tailstock to the right ...

BTW, if you were to operate the lathe with the headstock to the right, as most German watchmakers seem to have done and many still do, you will definitely need the location pin in the spindle. Otherwise a chuck or collet may unscrew ...
OR! Or if you had a left hand threaded collet!

Seems like an awfully non-standard item though. And I imagine they would be very hard to find. Probably cheap though.
 

wefalck

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Don't know how much of the production of the German manufacturers went into export and these lathes were not only used by watchmekers per se, so I would imagine that the need for collets with a left-hand thread would be quite low. And technically speaking they are not so important with the pin in place.

I think left-handed threads on collets were used on some screw-machines for turrets etc., but I don't have any reference to that.
 

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