Luthier’s Knife

The luthier’s knife looks very much to me like a common carpenter’s striking or marking knife. Be that as it may, I don’t have either, so I made one.

I started with an old, dull 3/4 inch spade bit. I marked a 45 degree angle on it and ground it down with my bench grinder, keeping it cool with frequent water dippings. I then used my belt grinder to put a bevel on one side of the blade. I honed it to sharpness on a whetstone. It’s not scary sharp, but it’s sharp.

For the handle I took a scrap piece of walnut and cut it to rough size. I drilled a hole in one end to fit the shank of the bit into. fitted a copper ferrule around the hole and forced the bit shank into the hole. Some sanding and shaping followed. I finished it with boiled linseed oil. I think it looks pretty cool too.

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