On 30 Mar 2016, at 18:39, andy pugh wrote:

> On 30 March 2016 at 18:26, Gene Heskett <ghesk...@wdtv.com> wrote:
>> So that would translate to around 8 dollars ea, plus ship of course.
>> Thinking...
> 
> I would be astonished if there isn't a more local source.
> 
> But, if you do decide to import from the UK you can probably knock 20%
> VAT off the price, and might want to consider these too:
> http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/Stevensons-ER25-Collet-Blocks
> 

I have those (one of each kind) and they are useful. Be aware, though, that the 
diameter of the nut is larger than the AF measurement across the body, which is 
a right nuisance because it means they have to overhand something (like a vice 
or a holder) or they have to sit up on a spacer. Otherwise, they do speed up 
some operations. AF thickness of the body is the same for the square as for the 
hex across flats.
I bought the ER25 versions, because the ER35s are way to big for what I need. 
In fact, smaller ones would be a good idea for many applications, but are not 
available. I know a man who made some big ones for himself, but the level of 
frustration in trying to ensure the collets were actually centred between flats 
was very high (and they were not hardened or ground etc), so I think the price 
for the ready-made items is worth it.

Marcus

> -- 
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1916
> 
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