Tiny boring bar

[Christophe Mineau]

Hi
For a very special work in the musical instrument area, I had the need of a very small boring bar.
I simply has the idea to reuse somewhat my D-bit design, which ended up working pretty well.
It's only 4 mm in diameter.

[rossbotics]

Now that's a small boring bar

Doug

[mudnducs]

SO small...I cant see it.

[ncollar]

I do not understand the two comment about his little boring bar. What part do you not understand. It's is a 4 mm bar cut like a "D" reamer, which usually cuts a finished hole exactly but in his case he is using it like a boring bar to make the hole bigger. I think he did a nice job of it and thank you for sharing with us.
Nelson

[Christophe Mineau]

Thanks Nelson.
Mudnducs, are you saying you can't see the picture?

[DIYer]

Thanks Christophe Mineau! We've added your Tiny Boring Bar to our Machining category,
as well as to your builder page: Christophe Mineau's Homemade Tools. Your receipt:

Tiny Boring Bar by Christophe Mineau

tags: boring bar

[Ralphxyz]

So did you turn down a 4mm bar to get the D?

Nice!!

Ralph

[mudnducs]

Thanks Nelson.
Mudnducs, are you saying you can't see the picture?

Bingo, yessir.

[philipUsesWood&Brass]

I see the (Awesome) photo's just Fine!!!

Wonderful work!

philip

[philipUsesWood&Brass]

So did you turn down a 4mm bar to get the D?

Nice!!

Ralph

I think the 4mm bar is purchased @ size and he only machined the "D portion" He is in Europe and "If Needed" would most likely have to machine to obtain "Imperial Sizes" 0.125, 0.250 etc.

philip