Burnerd Multisize Collet Chuck . .

[WALLACEParticipant @wallace]

Hello all.

 

I’ve got a Burnerd Multisize collet chuck which has either been dropped from a very great height or wasn’t ground correctly in the frist place as the run out on the end of the collet taper is a couple of thou.

 

So the question is – how or where can I get is reground  ? (and not for totally silly money . . ).

 

I should add that the spindle end is a L00 taper.

 

thanks.

 

WALLACE 

 

[WALLACEParticipant @wallace]

[KWILParticipant @kwil]

Sorry to see about your problem, the Multisize is a superb bit of kit as I have found.

 

Have you tried contacting Pratt Burnerd? try [email protected] 

 

He is the contact point for spares and may well direct you.

 

 

[WALLACEParticipant @wallace]

Thanks for the reply !

 

I was going to email – but thought I’d have a bit more of a play around first. . . 

 

I turned a scrap piece of  1 1/4″ bar paralell and put the chuck onto this ‘ back to front’ if that makes sense – and measured the run out of the LOO taper end. And it was about 1/3 of a thou – so now I’m starting to think the spindle on the lathe isn’t true.

 

Yet that appears to be the same – or possibly less. (Slightly diificult to measure around the full 360 degrees due to the locating key ).

 

Finally, I started to wonder about the accuracy of the taper on the chuck – when ‘blued’ up, it only appears to make contact with the broadest part of the taper – there’s virtually none on the front part.

 

All interesting (frustrating ? !) stuff !

 

Out of curiosity – and something to aim for – does anyone know what should be the run out of say a 1″ precision ground bar held in the chuck ?   

 

W.

  

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