I need to drill a 5/8" diameter hole through a laminated beam that is 16" deep. This beam is sitting 10 feet above the floor across a room support part of the roof. So I will be standing on a bench drilling from below pushing the drill up.
I need this hole to be perfectly vertical as I will be passing a rod through for a ceiling fan.
I know in the past when I had to drill through something much thinner like a
2x4, I often end up with a slanted hole.What can I do to ensure my drill is perfectly vertical?
I cannot afford to make a mistake and redrill.
Thanks,
MC