I use a drill press, which is ideal for drilling conduit. If you only have
an electric drill, you should use a center punch to make a dent right
where you want your hole to go. You may want to make some sort of jig
to make it easier to make that dent in the same place for every strut.
I attached my conduit drilling jig to my drill press with large C-clamps. I supported the far end of the jig with a scrap of wood, which I screwed to the jig so it wouldn't fall loose. |