Tangential Radiusing Tool for the Lathe

[Jim2]

I finally bought a QCTP last spring, so I've been making up some toolholders to give me the capabilities that I had with my old lantern-style tool holders. Here's a tangential-style radiusing tool that I just finished up. It uses a 3/16" HSS round tool bit with the 30 degree end. I haven't really used it yet other than a few test cuts to set the height on center, but should do what I need it to do.









Jim

 

[Andre]

Great job! Much better than the one I built back earlier this year.

I found it helpful to remove the radius at the tip and give it almost the profile of a square toolbit on it's end. If that makes sense, less contact with the work so less chatter.

 

[chevydyl]

That's pretty sweet. But what's it do? As far as the cut or whatever....why do I need one lol

 

[Andre]

That's pretty sweet. But what's it do? As far as the cut or whatever....why do I need one lol

Look them up to find out how they work, James Kilroy has a few videos on them.

They impart less stress on the machine, better surface finish, and much easier to sharpen.

 

[John Hasler]

Look them up to find out how they work, James Kilroy has a few videos on them.

They impart less stress on the machine, better surface finish, and much easier to sharpen.

So now we just need to develop a tangential shear tool.

 

[Dranreb]

That's neat, does it give a good chatter free finish?

Bernard

 

[John Hasler]

Look them up to find out how they work, James Kilroy has a few videos on them.

They impart less stress on the machine, better surface finish, and much easier to sharpen.

So now we just need to develop a tangential shear tool.

 

[chevydyl]

So it allows a radius at the shoulder?

 

[Jim2]

Yeah, I made one with a square toolbit earlier, but it didn't turn out quite as purty. This one is meant to leave a radius at the "corner" when transitioning between facing and turning or facing and turning a taper or such.

Here's the one w/ square toolbit. I've got a few small "whoops" in there, but seems to work well enough. I haven't been doing a lot of turning lately as I've been more focused on getting some toolholders finished, so it hasn't been tested much.










Here's a tangential style holder that I made up for my lantern-style toolpost. The QCTP holders are similar enough to this one, that I'm pretty confident that they'll work well.









Jim

 

[toolman49]

"So now we just need to develop a tangential shear tool."
G"Day Fellas,
It's already been done, rotate the toolbit 90 degrees clockwise in the holder, it works fine as a vertical shear tool.
Regards,
Martin