Your favorite turning insert

ChipSplitter · Jul 1, 2019

I used to run Seco's TP2501 grade in CNMG432 turning low-alloy steel, recently switched to Ingersoll's TT8125 grade with similar tool life at just over half the price. Is there someone else I should be trying? What is your go-to brand/grade for steels?

Nikolaiownz · Jul 1, 2019

Been using sangvik cnmg and vbmt but trying out the garant inserts slowly.

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litlerob1 · Jul 2, 2019

Whoever has what I need, when I need it. Turning insert could cover the light side of the Moon. I'm not going to sift through all Billion of them to find the cheapest one. I just don't have the extra time.

R

NAST555 · Jul 2, 2019

I used to mainly use Iscar but the past few years have been trying out others because of how high their prices have gone. So Mitsubishi make some great stuff, particularly their threading inserts, Seco have some good stuff but Walter are top notch on their Titex range of ISO inserts. Not cheap but kick butt. Sandvik I have used but they are also pretty pricey over here.

Mud · Jul 2, 2019

Iscar WNMG 432 TF in 9250 for just about everything except heavy roughing, WNMX in 9250 for when the WNMG insert breaks.

guest · Jul 2, 2019

Seems like whenever I find a grade I really like, it gets discontinued.

WNMG and VNMG most used for me.

My favorite GP grade is Kennametal KC935, when I can find'em on ebay I grab'em.

ChipSplitter · May 8, 2020

Thought I'd give an update of my adventures.

I just got done doing some A-36 with a laser cut hole in the center.
(Nasty slag and heat-affected zone.)
Insert was a TPMT 32.51 on a 1" boring bar with
Seco's TP1501 grade, got 10 parts per edge.
I got some Ingersoll inserts in this morning
(TT8115, equivalent grade to Seco).
They got 19 parts on an edge before biting the dust.
Oh, and Ingersoll was $9.00 instead of $13.00!

:cheers:

nateacox · May 8, 2020

I grab sumitomo usually as first pick, Mitsubishi as second. The new grades from both of those companies have been fantastic in steel/SS/and super alloy and titanium.

Street · May 8, 2020

i have not seen this insert for a while since i did my trade and don't recall its name but i can describe it.

It had a negative tilt to the job but a positive angle to going down to the right and it was a square shape insert with a centre pin holding it in place.

The thing was awesome for roughing, the feeds and depth it could handle where enough to max out the machine motor on the lathe (10 hp ) and the chips where ripping off in small short curls. It stripped material like it was butter.

Haven't seen it recently and don't know what happened to the manufacturer but am keeping a eye out for it.

seen similar designs in Milling cutters just the odd one.

Pitty its not around, the standard neg rake tool doesn't compare.

DouglasJRizzo · May 10, 2020

For turning I tend to go either Sandvik or Kennametal. Lately Sandvik.

Hardplates · May 10, 2020

I've never understood why people go with CNMG over WNMG unless they are using the 100 degrees sides for heavy roughing. Only reason I even own any CNMG holders and bars is cause I ended up with a bunch of ceramic and CBN CNMG inserts.

Am I missing something?

as9100d · May 10, 2020

Hardplates said:
I've never understood why people go with CNMG over WNMG unless they are using the 100 degrees sides for heavy roughing. Only reason I even own any CNMG holders and bars is cause I ended up with a bunch of ceramic and CBN CNMG inserts.

Am I missing something?

Right! I think most tool salesmen just push cnmg and vnmg. Maybe their margins are better on cnmg inserts??

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Hardplates · May 10, 2020

as9100d said:
Right! I think most tool salesmen just push cnmg and vnmg. Maybe their margins are better on cnmg inserts??

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Maybe not the margins in the insert itself but with 4 vs 6 edges they will sell more.

I will say the 100 degree edge is fantastic for heavy roughing on a manual, especially if there is nasty scale. But I and most people could get all the used CNMG inserts they want with virgin 100 degree edges for free.

exkenna · May 10, 2020

If you liked Seco’s Duratomic grades you’ll love this in steels. It’s got a huge sweet spot at less than $4.00 each:

ZCC CNMG432-PM YBC252

exkenna · May 10, 2020

Pretty good selection here:

CARBIDE360.COM LATHE INSERTS

cnctoolcat · May 10, 2020

Depending on how the pocket in the toolholder is made, WNMG’s can be slightly less reliable in the pocket than a CNMG.

Better-quality WNMG holders have part of an additional wall to capture the trailing outer edge of the insert, helping to maintain security during cutting.

No such issues with a CNMG tool holder...

ToolCat

ChipSplitter · May 10, 2020

CNMG vs. WNMG debates can make Ford/Chevy ones look tame......

I would go with WNMG but we don't do enough production to justify changing out the inventory. Someday, though.

Shop Supply Guru · May 10, 2020

exkenna said:
Pretty good selection here:

CARBIDE360.COM LATHE INSERTS

I’m curious do think the Zhuzhou brand inserts hold up against the big names?

CAMasochism · May 11, 2020

Hardplates said:
I've never understood why people go with CNMG over WNMG unless they are using the 100 degrees sides for heavy roughing. Only reason I even own any CNMG holders and bars is cause I ended up with a bunch of ceramic and CBN CNMG inserts.

Am I missing something?

We get a lot of use out of our 100 degree holders here for roughing. Mitsubishi inserts treat us well for the most pat.

For our really heavy roughing we use Iscar's COMG646 in a 100 degree holder. Nothing like taking off about 7/8" off of a diameter per pass. Though they don't like heavy forging scale so you have to be more gentle until you get through it.

exkenna · May 11, 2020

Shop Supply Guru said:
I’m curious do think the Zhuzhou brand inserts hold up against the big names?

I've been surprised with the performance. Like any other line, they have 2-3 home-run hitters and the rest are just average.

YBC252 is rock solid in all carbon steels with a perfect balance of toughness vs. wear resistance. It's stable up to 1100 sfm in low carbon and does not chip easily. I would say it's almost a carbon copy of Seco's TP2500

The YBG202/YBG205 twins are my mainstays in Stainless and will handle most Hi-temp alloys with the correct chipbreaker. They remind me of IC907

YBG105 for Inco and other nickel or chrome based alloys. Very similar in performance to KC5010.

I would like to have a quality domestic brand or a Mits but I'm a one-man show and the big names won't even talk to me. Gotta take what I can get.

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