Tuesday, October 31, 2006
Stepped Drill Bits
To join two bits of wood with a Bronze Screw requires a lot more work than you might think. Bronze screws will not go into oak without the proper pilot hole.
Ideally you want a pilot hole, an shank hole and a countersink hole, which all have to be concentric.
Since the screw is free to turn in the top piece of wood, the screws pull the second piece of wood tight to the first in a way nails just can't.
Not wanting to drill three holes per screw, I searched the 'net and found Fuller. They produce an array of drill bits and other accessories, but of primary interest to me was the stepped drills.
Combine these with a countersink and a drill stop and you can in theory drink your three holes in one fell swoop.
As none of their distributors had the particular drills in stock that I needed, they kindly shipped the drills directly to me. The drills arrived promptly, in little envelopes, with each one coated in a plastic that peels off easily to protect them from damage in the post.
It will be a while before I get to the stage of screwing things together. I have to cut the frames first, but rest assured that I will post the results here. I may even go overboard and cut a hole in half to show a photo of a hole with a screw inserted.