ER 32 chuck question

**morrisman** · 24th October 2011, 05:03 PM

Here comes another newbie question

I notice that when a collet is inserted into the R8 / ER 32 chuck , and the nut is done up, there are only 1.75 turns before the nut tightens down onto the collet and that's it... seems rather odd that such a short thread holds the collet in. Have others noticed that ? I sourced both the chuck and the collets from CTC . MIKE

**wbleeker** · 24th October 2011, 05:26 PM

Have you fitted the nut to the collet before screwing the nut onto the chuck nose? If you have a play with it you will see that the nut fits over an eccentric on the collet nose, do this and then screw it onto the chuck before putting your endmill in to the collet.
Will

**RayG** · 24th October 2011, 05:29 PM

I think Will, beat me to it, you have to "pop" the collet into the nut, have a look and you will see a ring that is cut around the collet.

Regards
Ray

EDIT: Just checked I get about 6 or 7 turns before it tightens.

**morrisman** · 24th October 2011, 05:37 PM

Ah excellent

... thanks both of you ....MIKE

Dave J · 24th October 2011, 05:56 PM

Here is a video on it, it may help others out as well.
[ame=http://www.youtube.com/watch?v=JmWxNbdTsds&feature=player_embedded]ER Collet Chucks and Collet Installation - YouTube[/ame]

Dave

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