Jun 16, 2006 · Is your screw a actual wood screw--with the straight, unthreaded shank before the threading starts? If so, the idea of the tapered bit is to provide clearance for the shank. That makes it easier for the board under the head to tighten up to the wood with the threads biting. Sometimes, you see recommendations for one drill bit size for …

Nov 4, 2004 · One caveat to the spade it suggestion. I ground down a spade bit several years ago to make tapered holes for Windsor chair legs. The bit worked fine, but had a nasty habit of grabbing the wood and spinning it around. If you try this method, be sure to use a drill press and securely clamp down your work piece.

Sep 30, 2020 · For square-shanked nails, I match the size of the bit to just above the midway point – or use a tapered drill bit, which will reduce splitting. Drill through the two pieces of wood to a depth of about one-half to two-thirds the length of the nail.

Aug 16, 2006 · Time to get a decent countersink set and plug cutters. Am considering the Lee Valley tapered plug cutters and their single-flute countersinks. Anyone have either or both of these, and can give feedback?

Sep 19, 2005 · I also have the LV countersink with the tapered drill bit and the matching plug cutter. I use gorilla glue for holding the plugs in place. Cut the plug on a drill press and then use a band saw to rip the board to allow the plugs to fall off. Roscoe

Jun 2, 2011 · When I drill countersinks for screws, I have two goals: zero chatter and a clean rim on top. Amana’s new countersink bits (amanatool.com) provide both, but with a twist. Unlike the steel countersinks I’ve owned, which tended to dull quickly, Amana’s countersinks have durable carbide-tipped cutters (the first on the market). To test …

Jun 17, 2002 · Normally the chuck has a tapered shaft and that is simply wedged into the quill. The process is to insert the chuck and then set the chuck by lowering it into a piece of scrap wood on the table, (drill press is not running).

Jul 7, 2020 · Chairmaker Elia Bizzarri reviews these modern-day spoon bits. Gramercy has started producing their own. These bits, small diameter or large, cut into hard maple and pine.

Dec 25, 2002 · Drill bit mounted countersinks are easily used in hand drills - tapered drill/countersink combinations drill thread, shank and countersink in one operation. I turn single flute countersinks slowly in most metals and fast in wood. I prefer spinning drill/4-flute countersinks in wood at 2000-rpm.

Dec 1, 2007 · For a cut-thread screw, in which the root diameter gradually tapers toward the tip, optimal drilling requires a tapered drill bit. Clearance holes— Another critical element in a successful screw joint is the head of the screw.