Posted by Raymond Anderson on 24/04/2016 07:35:00:
Hi Michael, Im with Andrew on the original use of ER collets being for tool holding. All the lathes ive seen in industry [ either in the flesh or on you tube ] If the work holding involves collets as opposed to power chucks then they all seem to use any type of collet other than ER …
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Raymond,
I understand and accept that … and, in fact, do not currently use ER for anything.
[which is actually the underlying reason for my interest in the system!]
I also understand that they are only intended for holding truly cylindrical shanks.
Perhaps I asked my question badly, but the point is: If Andrew's statement is correct, then [Contrary to what many would have us believe] the ER system would be more limiting than conventional collets !!
Perhaps another reference to the Regofix document is relevant:
See the blue box on p_4 of the PDF, regarding 'oversize' shamks
A very interesting subject.
MichaelG.
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P.S. … I have a good selection of 'watchmakers' collets, but I do regret being persuaded [on this forum] to sell my Burnerd Multisize chuck and collets, instead of finding a lathe to take it.
Edited By Michael Gilligan on 24/04/2016 11:21:02