Help identifying this drill bit?


Old 06-16-13, 07:31 PM
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Help identifying this drill bit?

I'm trying to drill a 1.5" diameter hole in a small piece of walnut (8" long x 3.5" wide x 3/4" deep). I want the hole to go through the wood about 1/2-5/8" deep, so it doesn't go all the way through. I want to be able to fit a 1.5" magnet in this hole so the other side looks like smooth wood but will act as a magnet to hold keys. I finally found a video showing what kind of bit I need but I do not know what they're called and if I can use it with an electrical handheld drill. The only bits I have for this are paddle bits, but the long tip on them would poke all the way through the wood. Here's a screenshot of the bit, can anyone help me out and give me some advice? Thanks!!

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Old 06-16-13, 07:47 PM
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Old 06-16-13, 11:52 PM
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Welcome to the forums.

The bit has been identified

What you are attempting to do and the depth in which you want to go would require the use of a drill press where you could set the stop depth. You couldn't hold the drill steady enough to control the bit as well as it's depth.
Old 06-17-13, 07:01 AM
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I was so busy getting the bit information for you that I did not read the rest of your post.

Do you require that this be made from a single piece? I've read of similar projects where the hole was drilled the other way (no need to be as precise and you can use a spade or other bit and not need to purchase a new forstner) and a piece of veneer placed over the magnet. Then you wouldn't have to worry about drilling 1/16 of an inch too far (and you can use cheaper wood for the back).

edit: I think that a forstner bit would not produce a flat hole anyway. There is still a protrusion in the middle. If you need to do this out of a solid piece, I think that a router is the way to go. But that's only my guess, I don't have many tools
Old 06-17-13, 07:54 AM
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If you don't have a drillpress to control the Forstner bit, or a router, you can file or grind the long point on your spade bit down to a short nib. To prevent the bit from skating start out with your hand drill at its slowest speed until you get into the wood a little bit, then you can speed it up.

You do realize that the keys themselves are brass or aluminum...?
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