I am doing this now with a sharp chisel but not happy with the quality of the surface in one area in particular...
If you look at then ends of a recorder or tin whistle, you may suprised to find the mouthpiece end is actually not a round hole; it has corners at the top, so that when you slip a plug that is flattened on top in, you end up with a flue that has a rectangular cross section. It is sort of like this poorly draw image:
EDIT - that should say raises the topmost point of the hole 1/16" not 16".
The place I am having trouble with is that ramp where the flue ends. It needs to be a smooth transition. I have a whistle on my bench right now that pretty much is as described - about 1' long with a 3/8" bore. It's about 2" in where I need to start the ramp. The ramp can be very short, but it needs a smooth surface. The trouble I have is that to cleanly cross the grain I need a much steeper blade angle than I can manage with a 1/4" chisel 2" down a 3/8" hole. Ideally, it should be cut from the other direction, but then I am 10" down in a 3/8" hole.
I have been trying to brainstorm some sort of scraper. Imagine bending the last 1/8" of a flat head screwdriver at 90 degrees. That might work - push in past the ramp and scrape it while pulling back. I would have to mark inches on the shaft because you can't see in there while working on it.
Thoughts?
If you look at then ends of a recorder or tin whistle, you may suprised to find the mouthpiece end is actually not a round hole; it has corners at the top, so that when you slip a plug that is flattened on top in, you end up with a flue that has a rectangular cross section. It is sort of like this poorly draw image:
EDIT - that should say raises the topmost point of the hole 1/16" not 16".
The place I am having trouble with is that ramp where the flue ends. It needs to be a smooth transition. I have a whistle on my bench right now that pretty much is as described - about 1' long with a 3/8" bore. It's about 2" in where I need to start the ramp. The ramp can be very short, but it needs a smooth surface. The trouble I have is that to cleanly cross the grain I need a much steeper blade angle than I can manage with a 1/4" chisel 2" down a 3/8" hole. Ideally, it should be cut from the other direction, but then I am 10" down in a 3/8" hole
.I have been trying to brainstorm some sort of scraper. Imagine bending the last 1/8" of a flat head screwdriver at 90 degrees. That might work - push in past the ramp and scrape it while pulling back. I would have to mark inches on the shaft because you can't see in there while working on it.
Thoughts?
