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Watchmakers lathe

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Steve Pavey22/04/2015 15:02:23
280 forum posts
32 photos

A couple more photos showing the accessories - I don't know what some of them are or what they are used for:

1 Step chucks

2 Collets - 33 of them, most un-named but a couple marked Lorch, and a couple marked with a symbol that looks like 2 O's slightly superimposed.

3 and 4 ?? Maybe something to do with the collets?

5 A small centre - max dia 3.9mm tapering down to 2.8mm approx. Is this a standard engineering taper?

6 ?? A brass pin, shank 3.18 x 7mm, head 3.95 dia x 3.3mm with a flat on the head - no idea what this is but it might be a watch part rather than part of the lathe maybe.

7 ?? Some sort of drive dog? The flat bar is slit and has a small screw to tighten it onto the long pin.

8 ?? Small 2 groove pulley with a cranked pin fitted into a hole near the periphery. The two pulley grooves are semi-circular section and slightly different sizes.

9 An 8mm collet, but different to the others - this one has a large bore and an extended nose, with a 6.25mm bore

10 ?? The 5/8" shank fits the bore of the brass pulley no 12 in the second photo, but that may be just a coincidence.

11 Pulley, 2 step, steel, with a tubular brass hollow tube pin pressed into a hole near the edge. Diameters 48 and 36mm with a 5.95mm bore, no grub screw or key way.

12 Brass 3 step pulley, dias 50, 40 and 30mm approx, 5/8" bore, socket head grub screw to clamp to a shaft.

13 Looks like a shop-made collet holder to fit in a standard chuck on maybe a conventional lathe or pillar drill. Takes the 8mm collets. The finish is nowhere near as good as on the others pieces but seems to be fairly accurate in terms of run-out.

Michael Gilligan22/04/2015 15:55:58
avatar
13974 forum posts
605 photos

Steve,

At 10. are two pivoting tools, used in conjunction with 3 & 4,

When a staff has a broken-off pivot, it is supported in the plate [working as a female centre] and drilled from the tailstock.

MichaelG.

.

Edit: This may be more than you want to know; but it's worth skimming, at least.

Edited By Michael Gilligan on 22/04/2015 16:01:03

Phil P22/04/2015 19:56:11
506 forum posts
137 photos

I have exactly the same lathe, and to be honest it does not get used every day, but there are some jobs where I would not be without it.

For instance, here is a photo of a musical box worm wheel being cut using the Boley as a tiny dividing head on the milling machine.

01 watch lathe set up.jpg

Phil

Doubletop23/04/2015 08:09:20
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409 forum posts
4 photos

I've got a Lorch albeit a bit bigger with 10mm collets and a 3 jaw chuck. I wouldn't be without it a number of smaller jobs have been transferred from my big lathe

I made my first engine on it

Yes milling on a Myford vertical slide

And the boiler

Pete

Michael Gilligan23/04/2015 08:19:05
avatar
13974 forum posts
605 photos

Steve,

At 2, you mention; "... a couple marked with a symbol that looks like 2 O's slightly superimposed."

That is probably the 'Crawford Collets' logo. ... image here

MichaelG.

Edited By Michael Gilligan on 23/04/2015 08:22:39

Steve Pavey23/04/2015 13:42:37
280 forum posts
32 photos

Thanks Michael - though quite how you deciphered that one I don't know, from my mistaken description. I've had a look with a magnifying glass and they do indeed look much more like Cs than Os.

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