As you recently mentioned already owning some WW collets: It would be worth checking the details of those, and making up a set that match.

Do you have a draw-tube for yours … and does it fit nicely ?

MichaelG.

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P.S. This book is 'definitive' on Moseley and Webster Whitcomb:

https://archive.org/details/watchmakerslathe00good

I recommend reading all of it, thoroughly … but you might want to look at Chap. III first.

Edited By Michael Gilligan on 26/08/2019 13:43:36

Chris from your clasified you say "Sizes needed metric from #3 to #53" can I ask where you have come up with these "metric" sizes from?

I fear you may again be looking at American books by your use of # where here in the UK we tend to use No. for number. If you indeed mean number sizes then these are not metric so you also need to look for the correct sizes when buying collets.

Number drills are becoming obsolete but still crop up in old books and on old drawings, you would be better off getting drills in 0.1mm increments and then if you need to hold shafts to fit these try and find metric collets to fit or go to a small ER type collet system where each collet covers a range of sizes.

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Jason    According to Donald de Carle ( the Clockmakers Lathe ) in the numbering sytem for WW collets the number equals 1/10 mm

Chris       Crawfords were a well known maker of collets as well

Roy

Edited By roy entwistle on 27/08/2019 17:58:21