Another thing to note about ER collets is that the collet needs to be inserted into the nut before being placed in the holder. This is taken from the Tools4Cheap web site:
Edit: Link to additional information, including a diagram on using ER collets on the Arc Euro Trade site
http://www.tools4cheap.net/proddetail.php?prod=er32 Wrote:The nut has a offset ring inside of it. You must put the collet into the nut at an angle and then straighten it. You then install both the collet and nut together on to the holder. If you try to put the collet in the holder 1st and then put the nut on, it will not fit and you could damage the parts.
Edit: Link to additional information, including a diagram on using ER collets on the Arc Euro Trade site
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