hammer bore distance

[John Delacour]

At 11:55 -0400 22/10/07, Cal Munson wrote:

>I have gotten some hammers bored recently and have discovered in 
>putting them on that the bore distance is about 1/4 inch greater 
>than on the old set....
>
>...I am wondering what  would be considered  reasonable tolerances 
>in the ideal bore distance?

Half a millimetre.

JD