Unknown Collets?

john_c_kennedy

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May 12, 2014
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Can anyone tell me what kind of collets these are? They have no internal threads, I assume theyou are compressed from the front as the closers nut presses them back into the taper?

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Thanks guys,
They look to me like B42 spring collets, but the dimensions don't quite match (see below).
 

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Schaublin Type F collets?
This are the dimension of a F15 collet
I have a lot of these collets for sale, F10 / F15 / F16 / F22 / F27
Someone interested?

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No they don't fit, i think the spindle is from a internal grinder
I still want to sell these collets
 
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