Small Boley or Levin collet identification

[Oily RagParticipant @oilyrag]

Amongst a range of equipment I have recently acquired is an assortment of small watchmakers collets. These are all new items in packets – but what machines do they fit? They are mainly imperial sizes although there are some metric items marked in the 'Boley 'system' ie 23 being a 2.3mm bore. there are some 'short' types of the 'U' type and some 'U' type collet nuts. The dimensions of the back diameter is typically 12mm for the 'U' type, 9mm for the 'T' type and 7mm for the 'S' type. There are two other types 'K', 'L' and 'M' which have threaded shanks of 3.5mm, 4.5mm and 6.0mm respectively. these collets have hexagons (for closure) on their front faces.

I will post some photos

Martin

[Oily RagParticipant @oilyrag]

What machines do these collets fit?

[Oily RagParticipant @oilyrag]

Here are some (rather poor quality – managed to break the lens glass on my phone!) pictures of the collets mentioned in my opening post.

I can get them out of the packets and make some better measurements and also borrow Mrs Rag's phone for some improved pictures!

Thanks for any guidance,

Martin

[Author]

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