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What size cutters for carbide lathe tools?

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Forum topic by SuperCubber posted 03-13-2016 09:02 PM 530 views 1 time favorited 12 replies Add to Favorites Watch
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SuperCubber

868 posts in 1748 days


03-13-2016 09:02 PM

Topic tags/keywords: carbide lathe tools carbide cutters

For you folks using carbide lathe tools, which cutter sizes for square, diamond and circle do you find most useful? It would be great to have various sizes, but I’m looking to start with one of each type. Also, what is the advantage to a radius square cutter vs. a square cutter?

I think I’ll use them for a combination of spindle and small bowl turning.

For what it’s worth, here is what I am planning on ordering:

13mm round
12 mm square
10×20mm diamond

Thanks,

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine


12 replies so far

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TheDane

4997 posts in 3126 days


#1 posted 03-13-2016 09:27 PM

Radius square cutters are less likely to dig in … you can cut on the radius as well as the corner.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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SuperCubber

868 posts in 1748 days


#2 posted 03-13-2016 11:13 PM

Thanks, Gerry. Wouldn’t it be pretty difficult to cut a tenon with a radius though? I’m not opposed to getting both, and I probably will. I’m just trying to understand all the pros/cons.

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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TheDane

4997 posts in 3126 days


#3 posted 03-14-2016 12:38 AM

Thanks, Gerry. Wouldn’t it be pretty difficult to cut a tenon with a radius though?

Probably … but I am an HSS guy anyway, so I have never tried doing a tenon with carbide tools. All I have ever used my carbides for was roughing, and haven’t even done that since last summer when I learned how to do Ellsworth’s roughing and shearing cuts.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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Rick M

7913 posts in 1843 days


#4 posted 03-14-2016 02:11 AM

How I use mine—
Square: great for roughing abrasive or very hard woods, good for squaring off ends or making long flats. Slower than a roughing gouge.
Diamond: I use this for finding centers and in combination with parting tools in very hard or abrasive woods, also sometimes in starting beads.
Radius: Cuts a little faster than square but is prone to catching, especially if you plunge.
Round: Marginally useful for coves in very hard or abrasive woods. I sometimes use this for removing bark.

I don’t think the size matters except match it to your tool size. So you don’t want a 5/8” cutter on a 3/8” bar. I order my cutters from AZCarbide.com and have been very pleased all around.

-- http://thewoodknack.blogspot.com/

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SuperCubber

868 posts in 1748 days


#5 posted 03-14-2016 02:22 AM

Thanks, Rick. That’s actually where I’m ordering them from. Glad to hear you’re happy with them.

I was planning on using 1/2” bar for all of them and tapering the end if/as necessary. Do you think that’s a reasonable plan?

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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SuperCubber

868 posts in 1748 days


#6 posted 03-14-2016 02:44 AM

In case anyone else comes along looking for this info, I just found this nice comparison guide at azcarbide.com. This answers my question about the sizing pretty well.

http://azcarbide.com/wp-content/uploads/2015/05/Insert-Cross-Ref-Chart.pdf

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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Rick M

7913 posts in 1843 days


#7 posted 03-14-2016 03:53 AM



Thanks, Rick. That s actually where I m ordering them from. Glad to hear you re happy with them.

I was planning on using 1/2” bar for all of them and tapering the end if/as necessary. Do you think that s a reasonable plan?

- SuperCubber

That should work fine. Last time I ordered it was late on a Friday, got a ship notification Saturday morning and had them in hand by Tuesday I think.

You might consider one of the Hunter round cup carbides. I’ve never used one but I imagine them as more useful than flat round.
http://azcarbide.com/product/8mm-round-carbide-shear-insert-for-wood-fits-hunter-2-tool/

-- http://thewoodknack.blogspot.com/

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JoeinGa

7481 posts in 1470 days


#8 posted 03-14-2016 08:42 PM

I just got my first order from AZ. Ordered online last Friday, they we in my mailbox today.

I made my own tools using 5/8” aluminum barstock. I narrow the tips down and had been using the 14mm cutters up till now. This time I ordered the 15mm cutters.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

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SuperCubber

868 posts in 1748 days


#9 posted 03-14-2016 08:54 PM

Thanks, Joe. I saw your post with the aluminum bar stock. Those were some pretty tools!

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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Rick M

7913 posts in 1843 days


#10 posted 03-14-2016 09:00 PM



I made my own tools using 5/8” aluminum barstock.
- JoeinGa

How is the aluminum holding up sliding against the steel tool rest? That was the only thing that held me back from using AL, fear a groove would wear into them.

-- http://thewoodknack.blogspot.com/

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JoeinGa

7481 posts in 1470 days


#11 posted 03-15-2016 12:33 AM


I made my own tools using 5/8” aluminum barstock.
- JoeinGa

How is the aluminum holding up sliding against the steel tool rest? That was the only thing that held me back from using AL, fear a groove would wear into them.

- Rick M.

Actually holding up very well Rick. No real big digs or gouging, just getting pretty marred up and scratched, but they slide back and forth just fine. I’ll try to remember to get a pic to show.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

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hairy

2384 posts in 2995 days


#12 posted 03-15-2016 12:49 AM

My go to tool for tenons is a square, not radius square. I make sure to cut only 1 surface at a time, bad things can happen, at least to me. A 1” skew flat on it’s side works pretty good,too.

-- stay thirsty my friends...

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