By using this method, a very concentric and accurate drill can be made with simple tools. Here’s the one I made:
I made a post on Lumberjocks showing my method for making the bit itself. After using it for a while, it’s clear that this style of bit has a firm limit on depth when drilling hardwoods as the dust is not extracted from the hole. By contrast, it’s very efficient on soft woods like poplar.
This method for making a momi-giri (japanese gimlet) can also be applied to all sorts of tool handles. The drill bit itself may need to be replaced with a temporary center (instead of a file, for instance) before turning on the makeshift bow lathe. Turning on a lathe powered by your
servant friend is kind of fun!