1597Re: [mlathemods] Re: live center woes
- May 2, 2006
----- Original Message -----
From: "Ellis Cory" <ellis103@...>
Sent: Tuesday, May 02, 2006 10:24 PM
Subject: Re: [mlathemods] Re: live center woes
> David wrote......It's pretty fundamental, David Halfpenny, that the
> headstock center would be non-hardened because it turns with the work.
> No need to go to the trouble and expense to harden it. That's got
> nothing to do with its accuracy........
> Not quite. Originally the 2 centres were both hardened and
> interchangeable for both ends. As the work needed to be more accurate, it
> was discovered that even putting the centre into the taper could give
> different results, so they were kept soft so that they could be trued up,
> however, that quickly caused a problem at the tailstock end. Hence
> traditionally, one hard and one soft. You pays your money, you takes your
> choice LOL
Just to add to Ellis' reply, what I had in mind was the ability to true up
the headstock centre to eliminate any error in the headstock spindle -
quite a consideration in the past.
Of course, it won't help if the bearings are wobbly!
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