this is a quick instructable
with great results.
Drilling nicely straight holes
Using something tubular ie copper pipe , etc
But try and make sure the rim of the pipe is 3mm roughly
And that the pipe will fit the jaw,s of your drill
Step 1: What You Will Need
you will need
2)pipe cutter or a piece of pipe about 2-3 inches long.
4)clamp or tape
and that,s it
Step 2: Cut the Pipe
with your pipe and cutter.
at about 3 inches or so down the length cut your pipe.
using the pipe cutter
Step 3: Adding the Pipe to Your Drill
the pic with just the tube is what you should be left with
now place the pipe or tube into your drill
Step 4: Sanding
using quite a coarse bit of sandpaper
tape it or clamp it down.
then with your drill at a 40-45 degree angle.
bevel the edge of the pipe using the sandpaper & drill,
while your holding the trigger down slowly move the drill left to right ,because you dont want to be going through the sandpaper.
once you have a nice bevel.
its onto the next step
Step 5: Drill Away
grab a scrap piece of wood.
and start drilling away.
if the tube skates all over the wood.
go back to the sandpaper and change the angle slightly ,
down and up movements with the drill will get you there.
Step 6: Finish
and there you have a nice straight hole.
thanks for looking,
and remember .
SAFETY COMES FIRST.