I have an old horizontal boring machine that came with a brad point bit. It works fine for drilling holes for dowels or to drill holes for a mortise. What I'd like to try is to drill a slot for a mortise rather than overlapping holes. I'm wondering if there is a better choice that a brad point drill. I've tried using the brad point, but the slot comes out sloppier than it should. For a router I'd get an upcut spiral bit or something like that, but I'm not sure if there is a similar choice for a drill at 1700RPM. Someone mentioned something like a four-fluted metal bit to me once, but I'm out of my element here. Any suggestions on the best bit to use for cutting a slot rather than just overlapping holes?
- posted
20 years ago