Fine points of drilling bridges

[Ron Nossaman]

At 05:32 AM 6/14/99 -0400, you wrote:
>I have a few Plexiglas blocks with 6 bridge pins mounted in for different
>pin groupings and use this as a punch once the center and front lines
>are established. I first drill straight down enough to start the hole with a
>'numbered bit' then come back and drill at an angle. This avoids drifting.
>
>Jon Page
>


Sorry, I wasn't very thorough with my explanation. I use one of a few 1/4"
plexiglass blocks too, with 6 #6 bridge pins slip fitted in the holes. The
clear block lets me see my reference marks or pattern for positioning, and a
light tap on the top of each of the pins marks the hole locations. A second
pass through the entire bridge (maybe five minutes time) with my single
punch shapes the marked dimples better for drilling.

Good point from Jim K about having the bit spinning when you go in too.
That's just one of the advantages of drilling on the drill press when possible.

 Ron