On 24 Jun 2010 00:08:50 GMT, "DoN. Nichols"
wrote:
Define "set" here. What range of sizes, in what step size? I
would presume a max size of 1/8", and a minimum down where the skinny
leads on diodes and TO-5 can transistors lived -- perhaps plus a bit to
allow for through hole plating.

Enjoy,
DoN.

The low-cost PCB houses have min hole sizes around 12 to 14 mils now,
as for vias on surfacemount boards.