Just out of curiosity,
where did you get those numbers from?

Don't think I am disagreeing with you
(I've been shooting for 11-14 mils), 
but I don't remember where I got 
THOSE numbers from! 

Jack (aka "the new guy")

.
On Tue, 21 Feb 2012 10:02:36 -0600, Mark Larson <[log in to unmask]> wrote:

>first of all, you have to consider the tolerance,
>take a look at the maximum and minimum lead diameter for the component:
>in the case of minimum lead diameter to maximum hole diameter, the difference should not exceed 28 mils
>in the case of minimum hole size to maximum lead size, the difference should not be less than 6 mils
>this is for auto insertion and predates no lead
>but obviously you want to shoot for the middle rather than toward either extreme
>design for auto insertion and manual insertion will be fine