Clock/Watchmakers Attachments

This topic has 10 replies, 6 voices, and was last updated 22 October 2017 at 23:28 by Michael Gilligan.

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22 October 2017 at 19:42 #33090
Robert Butler
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@robertbutler92161
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22 October 2017 at 19:42 #322899
Robert Butler
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@robertbutler92161
i recently purchased a lathe and included with the attachments were a number of collets. I am sure someone more knowledgeable than I can identify them from the image below. Thank you in anticipation. Robert Butler
22 October 2017 at 19:47 #322902
Bazyle
Participant
@bazyle
This size of collet is normally described by the diameter of the shank. 6mm and 8mm being the most common.

The numbers on the end are the diameter it holds in tenths of a mm.
22 October 2017 at 19:48 #322903
Robert Butler
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@robertbutler92161
Thank you, any ideas which make of lathe???
22 October 2017 at 20:07 #322910
Speedy Builder5
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@speedybuilder5
And I am sure you know that the piece on the far left of the photo is the tool rest for the graving tools.
22 October 2017 at 20:28 #322913
Michael Gilligan
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@michaelgilligan61133
Posted by Robert Butler on 22/10/2017 19:48:53:

… any ideas which make of lathe???

.

Unless the collets are marked for a particular make; I'm afraid you will need to identify the thread [pitch and form] before there's much hope.

MichaelG.
22 October 2017 at 20:38 #322917
Brian H
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@brianh50089
Robert, are there no markings on the lathe itself?

Brian
22 October 2017 at 20:58 #322921
thomas oliver 2
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@thomasoliver2
The toolrest looks Pultra style and some of of the collets look decidedly like my Pultra tailstock ones, which have an exact 8mm shank, but the thread might be 7mm x 0.6mm or 17/64in x 38tpi. Some Pultra watchmakers lathes also had this size in the headstock.. My collets are stamped "Conflex" and the size in mm on the end face.

.
22 October 2017 at 21:36 #322927
Robert Butler
Participant
@robertbutler92161
Dear Brian & Thomas, apologies for the delay – dinner and measuring the shanks interrupted. The lathe referred to is a Super 7, the attachments were included with a number of non related items. I measured the shanks and they are indeed 8 mm, the sizes are 1.5, 1.6?, 2.4, 3.0, 3.2, 3.4? and one unmarked. There are 2 chucks and the tool rest there are no marks. http://WWW.lathes seem to confirm the items do indeed relate to a Pultra lathe. Thank you for your help Robert.
22 October 2017 at 23:14 #322939
Bazyle
Participant
@bazyle
The spec is standardised so they can fit loads of watchmakers lathes not just Pultra, and some slightly larger like the George Adams 2 1/2" that was sometimes factory fitted with an adaptor. Some Potts spindles take them so it is likely that some Arrands do to.

They wouldn't be used in the Myford spindle itself so it is quite likely the previous Myford user had such a spindle.

90% of them I've seen are metric but there are imperial fraction sizes too.
22 October 2017 at 23:28 #322942
Michael Gilligan
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@michaelgilligan61133
Posted by Michael Gilligan on 22/10/2017 20:28:25:

I'm afraid you will need to identify the thread [pitch and form] before there's much hope.

.

I hesitated to scan this list from my copy of the book, but lathes.co.uk has saved me the trouble:

Please look at the tables at the bottom of this page:

**LINK**

http://www.lathes.co.uk/watchmaker/

MichaelG.

Edited By Michael Gilligan on 22/10/2017 23:32:58
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