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Fitting Chuck Jaws

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Dalboy28/02/2020 17:03:59
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Posted by Bandersnatch on 28/02/2020 16:57:48:
Posted by Chris V on 28/02/2020 15:47:08:

BTW it did occur to me after I had made my request that if the manufacturer have gone to the effort of supplying two sets of jaws and had bothered to number them they why would he have numbered say no 3 jaw if its correct position was slot 4! Doh!

 

Now I'm confused. This suggests you're talking about a 4 jaw chuck (in which case it wouldn't have a scroll anyway). The original post said 3-jaw.

As far as I know there are two types of 4 jaw chucks independent and self centreing which is a scroll type

Edited By Derek Lane on 28/02/2020 17:05:09

Chris V28/02/2020 17:06:15
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Hi Bandersnatch, sorry no my last post was incorrect, I was talking about my 3 jaw self centring chuck. One jaw fitted easily the other two not so much.

My last post was indeed confused! If you re read it & substitute the 4 for position 2 hopefully you will get what I meant, not that it was important, just recognising that part of my question was a bit daft!

Chris.

Enough!28/02/2020 17:09:32
1719 forum posts
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Posted by Derek Lane on 28/02/2020 17:03:59:

As far as I know there are two types of 4 jaw chucks independent and self centreing which is a scroll type



Absolutely, Derek and I (quite correctly) stand corrected.

blush

Howard Lewis28/02/2020 18:11:30
7227 forum posts
21 photos

Unless you are prepared to mess about with shimming the job against one jaw, you are stuck with whatever eccentricity your 3 jaw delivers; which may vary according to diameter being gripped.

A 4 jaw independent chuck puts you in charge. When you start learning the technique, remember that you only need to adjust by half the error. i.e, if the run out is 0.020 you adjust by 0.010, in the hope of bring things into line ASAP.

When you turn the Backplate do make sure that it is a good fit in the chuck body, and that the face is square to the lathe axis. Skim it to be certain.

Go for it!

Howard

Chris V29/02/2020 17:28:59
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313 forum posts
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Thanks Howard!

Cheers

Chris.

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