Chuck size (good idea or not.?)

[Neil WyattModerator @neilwyatt]

Ah! I'm sure I have seen the Jacob's rubber ones illustrating comments about the Bernerd type.

Neil

[Nick_GParticipant @nick_g]

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Good and interesting replies. Thanks.

The side discussion about the collets is a worthy one and I can understand the benifits of such a system and why it should be considered when purchasing a new chuck.

I should however have made my requirements a little clearer in my OP (which also ties in with a recent thread I made about avoiding marks on work) I will also need to re-hold part finished items that would not be possible in a collet chuck such as things in the image below.

A collet chuck at some point will be on my 'new toy' list though.

Cheers, Nick

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for the picture, Nick

Both aspects of your requirement are now much clearer.

I would be tempted to make a sleeve, split lengthwise [i.e. two pieces] and nicely finished:

Outside diameter bigger than the lumps on the job, and maybe with a flange.

… This would then clamp very nicely in a big collet.

MichaelG.

[Nick_GParticipant @nick_g]

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Michael, from henceforth you shall be know as 'The collet fetish man-guy-bloke-fella' .!!!!

Nick

[Bob Brown 1Participant @bobbrown1]

There is one other thing with collets that has not been mentioned (I think), they tend not to mark the work piece, never mind the repeat accuracy that you'll never get with a 3 jaw self centring chuck unless you use soft jaws. You can reduce the amount of TIR on a three jaw chuck by using shims, this can be calculated or a little trial and error.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Nick_G on 03/08/2014 08:53:02:

Michael, from henceforth …

.

Nick,

I can live with that

Make me a badge, and I shall wear it with pride

MichaelG.

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