mikegw20 wrote:
>--- In Homebrew_PCBs@yahoogroups.com, "Mike Young" <mikewhy@s...> wrote:
>
>
>>Can I conclude, from the lack of choices for 1/8" shank center drills
>>
>>
>When printing the board you can add a cenre hole by making the
>component pad a donunt. The slight raise in the copper makes it
>possible to centre the pcb drill when working without a drill press.
>Without the donut is is very hard to keep the bit on track.
>
>
Yep small holes in pads do wonders for doing it by hand. Even leave a
small ring where you just want a hole, and eat away the copper as you drill.
Reason for no choices in drill bits by hand? Likely only 1 in 1, 10,
or 100 million holes is done by hand. Everyone in the US uses dozens of
items with hundreds of holes in PCBs each the percentage of people who
ever even use one of these type bits by hand even once is near zero.
Only money for these bits is in commercial use, and there it's 100%
automated. Near absolute zero need for what you're wanting..
Plus I'm sure someone has some somewhere, finding and getting and not
costing $20 each are all different stories though.. Look Asian, most
PCBs are manufactured there..
Alan