Cutting "Swiss Cheese" With The Mill 4™-12KT

Handling even the most severely interrupted cuts with ease, the Mill 4™-12KT is a staple of stability and strength when it comes to indexable milling.
Tangentially mounted inserts have shallower pockets which allow for a larger core size of the cutter, very strong cutting edges on the inserts, and easy access to insert screws.
Mill 4-12KT requires up to 15% less horsepower, enabling increased feed rates, even on small machines.
The patented insert design - featuring a triangular shaped margin - provides unprecedented stability in steel and cast iron applications.
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[@JohnDoe-gv9jv]

Thank you for your videos. I always watch them. I never would have tried to run it that IPT amount. I would start low and override until I thought it maxed for whatever machine I am on. Here is what I think and tell me if I am on the right track here. I am not that great at speeds and feeds, never have been. I would reference the book are call the tool cutter salesman and ask him his recommendation for this tool and tell him the material I am cutting. Is this OK? Would this be the right method.? Should I just work my way up to a feed and hope it is right? Thank you.

[@virgiliodegasperinmora2795]

I recommend you watching nyc cnc channel, John explans speeds and feeds and recommends great numbers

[@skreech01]

Whats the intro song ?

[@MrReichennek]

it's an iscar 490 insert essentially.

[@glennggeorge]

I understand that this is for demo of the cutting edge so you can see it but I would think you would still want to use a coolant. You can see the smoke coming off the bit.

[@justinpatterson7700]

steel generally doesnt *need* coolant. definitely good in most applications, but steels carry the heat away in the chip, meaning less heat in the cut than something like stainless or aluminum

[@bobsbillets8863]

What I want to know is why did it chip in the first place? You did the last cut which should have chipped the inserts becasue it did in the first cut. So what gives? I dont know, but seems like you are trying to pull a fast one on us as one other person posted.

[@perceive8159]

Are these inserts uncoated carbide? If they are then the “ base carbide “ most be of a much tougher composition compared to coated grade carbide. I remember back in 80’s/90’s coating compositions were nothing like they are now, Mitsubishi produced a black uncoated grade that was unusually tough, nothing in the industry could match there performance, I think Kennametal made a uncoated 950 grade not well suited for interrupted cuts, very brittle.( they still might?) I could rough/finish with interrupted cutting with very little tip damage, nothing out there could match there performance. But then they stopped making them and focused on coatings and the base carbide was much less tougher, didn’t get near the performance. So I’m assuming your inserts if uncoated are taking on the properties of similar composition which is of course a guarded secret 😁

[@KennametalInc]

Coatings and substrates certainly have evolved over the years, and the combination we use for Mill 4-12KT inserts are no exception. Advanced processes including post coat treatments all work together to make inserts capable of some amazing machining parameters.

[@jesther4140]

@@KennametalInc I Love the intelligent and informed replies this representative offer viewers. Keep up the informed discussion!

[@bryanrude8072]

@@jesther4140 Why would you love that responce? He never answered the question: "Are these inserts uncoated carbide?"

[@jesther4140]

@@bryanrude8072 Guess I wasn't thinking about that as, at the time, I had read several comments from Kennametal's rep. on other videos. I was commenting on how collectively proficient their answers have been. My mistake

[@dmitryserov5595]

How about 10mm axial depth and not so aggressive fpt?

[@KennametalInc]

The Mill 4-12KT can certainly handle a 10mm axial depth of cut, but since many machines lack the Horsepower for such a cut, we choose a smaller depth and more aggressive feed rate for the video.

[@christianpizarro8772]

which are the RPM ?

[@jesther4140]

RPM is not explicitly listed. They do provide SFM though. RPM = 3.82 x SFM ÷ Diameter (Cutter O.D.)

[@machineworld1873]

seriously 😲😲

[@christiannunez2702]

actually you can easily fool us by just cutting the video and replace it with a brand new inserts after you machined the part :)

[@ivancigognini2449]

Merde