Advice needed, tool or technique

[George Speed]

Seems Midnight + is a good time to seek help!

Guys n gals,
In the pic below,

What tool and or technique would you advise?

While turning the inside;
I was quite afraid of catches. ( last step)
And I observed that with my smaller tools, the bevel, rather than the cutting edge would contact the surface.

Ok, perhaps not unexpected. I can imagine that cutting edge to center of the work certainly plays a role.
I do have a micro sorby set.
Round nose scraper, tiny gouge.
1/4” skew.

These I sell. So of course a catch is not allowed.

I appreciate any teaching you can offer!

Best regards,
George of the Lathe Jungle.

PS the inside was initially bored with a step drill bit.
I was getting close… chickened out!

 

[Curt Vogt]

Howdy George, I love my Sorby Micro tools but depending on how far you need to go into the form, they will not be sturdy enough to give good results. I have a 1/2" wide scraper that I ground to a round nose negative rake (Double Bevel Scraper) that is much sturdier. The round shape is easy to control and blend cuts inside boxes and such. The thing is that scraper is still 1/4" thick stock and so the underside of the left side will hit easily on the inside of a small diameter like you have there. The solution is to grind away the left underside so it won't hit the project side wall and ruin your cut. While you are at it, go ahead and continue that negative rake down that left side of the tool too. Gentle cuts with a fresh bur on the Negative Rake will help tremendously.

A round nose or square nose with a radius carbide tool could work, but with your inside diameter so small, you would need to heavily modify it by removing lots of supporting metal under the cutter. If you do that, go on Amazon and buy the cheapest round nose carbide tool you can find before you commit to grinding things away that you can't put back. Easy Wood Tools makes a negative rake cutter for their tools but there are other options out there if you look.

The last suggestion is a reminder not to stick sandpaper in there along with a finger to hold it! Broken fingers are no fun. Use a dowell with a slit cut in it to hold the sandpaper or maybe hook and loop would work too. And no... woodworking is not how I know about broken fingers.... soccer ball hit was the worst.

Best of luck!