I've been asked to evaluate some images, hole wall plating defects, and try to locate the cause.

The information available to me are these are drilled 0.021" holes, they were drilled one panel up, four panels total, and there was only one 0.021" tool per spindle. The spindles were new or repoints. Upon evaluating the bits nothing really jumped out as bad...another image not posted shows excessive nailheading.

I'm open to any and all comments...as well as a list of items I can begin checking...thanks

I've posted the images at http://asbell.net/images.htm

Franklin

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