The other day, I finally decided to make my own fire bow drill. I had a chunk of a cedar 1 x 2 laying around and went to it.
To my amazement it actually worked relatively easy.
!
I make the base and the spindle from cedar. The bow is a limb off one of the white pines in my yard and the bearing block has a small ball bearing race cut into it. I used jute twine that I pulled apart for the tinder bundle and kept the fire going by throwing cedar shavings from constructing the spindle on top of the burning tinder bundle.
It took about 30-60 seconds of cranking on the bow and viola! The photo shows the finished product along with the tools I used to make it.