Does anyone make ER collets to hold hex bar?

I don't think it's impossible, though they'd probably have to have 12 
slots rather than 16 - but then some small ER collets only have 12 slots 
anyway.


-- Peter Fairbrother

On 22 Jul, 01:24, Peter Fairbrother  wrote:
> Does anyone make ER collets to hold hex bar?
>
> I don't think it's impossible, though they'd probably have to have 12
> slots rather than 16 - but then some small ER collets only have 12 slots
> anyway.
>
> -- Peter Fairbrother

Hi Peter ...I have been using the standard round bore ER25 's to hold
Hexagon bar for a long time now with no apparent problems...but
obviously this does not answer your question ...I am fairly certain
Square bore collets can be obtained but as to Hexagon ones...I am  not
so sure..Try this site...

www.tradesalesdirect.co.uk/

Al the best for now,
                           John.

john.morton22@btopenworld.com wrote:
> On 22 Jul, 01:24, Peter Fairbrother  wrote:
>> Does anyone make ER collets to hold hex bar?
>>
>> I don't think it's impossible, though they'd probably have to have 12
>> slots rather than 16 - but then some small ER collets only have 12 slots
>> anyway.
>>
>> -- Peter Fairbrother
> 
> Hi Peter ...I have been using the standard round bore ER25 's to hold
> Hexagon bar for a long time now with no apparent problems...but
> obviously this does not answer your question ...I am fairly certain
> Square bore collets can be obtained but as to Hexagon ones...I am  not
> so sure..Try this site...
> 
> www.tradesalesdirect.co.uk/
> 
> Al the best for now,
>                            John.
  Hi,

no luck there, but it's an interesting site.

Apropos making some collets and/or adaptors, how do you make a 
hexagon-shaped hole?

-- Peter Pairbrother

On Tue, 22 Jul 2008 14:23:01 +0100, Peter Fairbrother
 wrote:

>Apropos making some collets and/or adaptors, how do you make a 
>hexagon-shaped hole?

With a hexagonal drill of course... <G>

Regards,
Tony

Peter Fairbrother Wrote: 
> john.morton22@btopenworld.com 
> 
> Apropos making some collets and/or adaptors, how do you make a
> hexagon-shaped hole?
> 
> -- Peter Pairbrother

You know that lathe that was posted some time ago making hexagonal bar
out of round stock? You put the flycutter on the inside of the hole
instead of the outside.

Alternatively, wouldn't you use a wobbly broach?


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In article , Tony Jeffree 
 writes
>On Tue, 22 Jul 2008 14:23:01 +0100, Peter Fairbrother
> wrote:
>
>>Apropos making some collets and/or adaptors, how do you make a
>>hexagon-shaped hole?
>
>With a hexagonal drill of course... <G>
>
You can do it with a pentagonal drill....

http://www.integerspin.co.uk/polygon.htm


David
-- 
David Littlewood