Sandvik Coromant R210 Milling

[rockybrewer]

How come no colant is being used ? Tip cutters i used destroy the tips if they were ran that higher feed, is there a book at all explaining cutters ? Both tipped and solid carbide cutters ? I mustbe doing something wrong

[MesaPete]

Hello everybody, I was involved with this demo and I can tell you it was 4140, 28 Rc. Some of you mentioned dry cutting and heat propegation. With the high feeds involved, 90% of heat escapes in the chip, sparring the cutting tool and workpiece form heating up. The CM210 can run for hours under these conditions.

[SuperCncguy]

ram cheap ass roughers work the best, I would'nt have believed it if i didny try. The moral is...flood coolant and PUSH IT!

[SuperCncguy]

@baccus61 I would have to somewhat disagree...and agree, when dealing with carbide or any other tooling that come into play, Im glad to know someone else has played with 4140 or d2 tool steel, but the matter with COATED carbide is you dont know until you try. We use sandvik standard 2025 roughers forever but on 4140 stell

[Erw1nLangelaar]

coolant?

[wreschly]

I was thinking the same thing. BTW is that stainless?

[TheShred89]

all the heat is taken away with the chip, you need some serious spindle power though, some of these cutters are running at 4mm/tooth, crazy!

[princeigorash]

@Erw1nLangelaar They use AIR.

[william4art]

@Erw1nLangelaar no coolant needed ...looks like bronze which is a soft metal. using air and a combination of faster speeds and feeds with a small depth cut somewhere around an 1/8 allows this machine to do this easily.. theres nearly no cutter deflection on the machine or tool... with good inserts of course

[mustangsolor]

@william4art Looks like bronze? did you not notice the heat discoloration in the chips, or the surface rust? That is defiantly steel. A cut depth of .125" is not "small" with an inserted shell mill like this, especially not in steel. Coolant is not needed when roughing with carbide cutters, as long as chips are evacuated from the cutter path.

[william4art]

@mustangsolor yeah yeah steel is defiant sometimes ,,isnt it..lol I said it looks like bronze.. didnt say it definitely was!! I was agreed with the lack of need for coolant..lol Ive cut every type of steel on the planet with carbide insets...from 4140 to stainless...a2..d2...and s7 with no coolant with excellent surface finish results

[baccus61]

@william4art

I think the norm now is that the coolant actually causes micro cracks in the carbide shortening the tool life. But on the same token it is needed to carry away the swarf on deep jobs. The only problem with no coolant is trying to keep tolerances when the job heats up from the friction of cutting. A lot of jobs I see now have mist coolant just to lubricate the cutting edge and blow away the chips.

[disndat11]

Freaking awsome

[ydna2]

Heavy demo!