[Woodwind] Tone hole Cutter

[Christophe Mineau]

Hi !
Here is a very specific tool made for shaping the top of a tone hole chimney.
This is for tone holes that will be covered by a key. It is crucial that the pad of the key has a neat contact with the wood in order to avoid any leakage.
The contact surface is actually reduced to a single ring if the tone hole has a slightly spherical top.

Here is what we want to obtain :


And here is how it is done :
First, a guiding pin is turned down, given the diameter of the tone hole.
And then a custom ground shaping tool is used to cut the spherical shape of what will be the cutting edge.


Then I use my milling attachment to drill 6 transversal flat bottom holes with a small carbide end mill cutter.


This will form cutting teeth




Then I use a cutting disk on a Dremel to grind down the back of each tooth.




Here I'm using my transversal drilling attachment on the lathe with this tool.


Close up




Finished Job

[rossbotics]

Looks like it worked !

Doug

[Ralphxyz]

WOW, thanks for all of your post, fascinating work.

Ralph

[DIYer]

Thanks Christophe Mineau! We've added your Tone Hole Cutter to our Woodworking category,
as well as to your builder page: Christophe Mineau's Homemade Tools. Your receipt:

Tone Hole Cutter by Christophe Mineau

tags: music, cutter

[PG1]

Hi Christophe,

very nice toolmaking. I plan to make a similar spotfacing tool with a 1.5mm guide pin, to uniform primer flash holes on cartridge cases. The commercial ones are the wrong shape -- just a #2 center drill in a holder-- and can thin the case too much.
Is there a description of the milling attachment on your website?

Paul

[Christophe Mineau]

Hi Christophe,

very nice toolmaking. I plan to make a similar spotfacing tool with a 1.5mm guide pin, to uniform primer flash holes on cartridge cases. The commercial ones are the wrong shape -- just a #2 center drill in a holder-- and can thin the case too much.
Is there a description of the milling attachment on your website?

Paul

Hi Paul,
Not on my web site, but here on my, yes:
http://www.homemadetools.net/forum/h...1321#post93470

[dbat74]

Basically, a spot facing tool.