Instructor approves cutting steel at 2000sfm

[empower]

I don't think it was just trolling, I'm guessing there's either a communication issue between the OP and the instructor, or the instructor was speaking of carbide tooling, or maybe someone's just out to lunch.

Still hoping for video if they try it...

2000 sfm in steel is pretty far out there even for carbide.

 

[eaglemike]

Maybe he's out buying body armor. I'd be looking to borrow some, at least.

 

[Milland]

2000 sfm in steel is pretty far out there even for carbide.

Sure thing. And "surer thing" on a toy mill with inadequate stiffness and power.

 

[charlie gary]

Carbide is cheap these days...why wouldn't you teach with what they will most likely be using in the real world?

Cheap is a relative term. He's probably got something like $2,000/year tooling budget and more than 20 students breaking shit daily.

 

[Mtndew]

That instructor needs to be fired, he has no business teaching anyone if he wants to run HSS like that.

 

[Illinoyance]

That instructor needs to be fired, he has no business teaching anyone if he wants to run HSS like that.

An even bigger reason for firing him is that he creates a dangerous situation in the school shop.

 

[CarbideBob]

An even bigger reason for firing him is that he creates a dangerous situation in the school shop.

Is it all that dangerous?
What happens here even if a 50 HP and 60,000 pound machine?
Bob

 

[mhajicek]

Is it all that dangerous?
What happens here even if a 50 HP and 60,000 pound machine?
Bob

Well, since it's a 30 taper, which have notoriously weak pullstuds, as people have said the holder can take off like a bullet and punch through the enclosure. Not terribly likely, but I wouldn't say impossible.

 

[Larry Dickman]

An even bigger reason for firing him is that he creates a dangerous situation in the school shop.

what's even worse is they unleash a sea of ill trained operators who will go to their graves thinking they're doing it right, because that's how they were taught

 

[Fancuku]

I don't think your instructor knows the difference between 2000 SFPM and 2000 RPM'S

lol
I was thinking the same thing.

 

[Milland]

I will be forever brokenhearted if I don't find out what the end result was...

 

[sendithard]

@ShopRatCNC

I love how you teach them at the lower end of the risk curve....You may have a bad taste of Titans. I have gone thru their entire course....they do NOT teach aggressive recipes in their educational series. We all know they push the boundaries on other videos....but I think they have been quite reasonable in their academedy.

 

[sendithard]

Bro, I ain't going nowhere You may also be heartbroken when I step in and prevent such a disaster.

 

[sendithard]

I'm not trolling...I'll fill you all in when it happens, if it happens....I'm still protesting until we get the gcode to the controller. I'm trying to avoid issues so I appeciate everyones talk.

 

[Cole2534]

I'm not trolling...I'll fill you all in when it happens, if it happens....I'm still protesting until we get the gcode to the controller. I'm trying to avoid issues so I appeciate everyones talk.

Post up some code, let's see this baby rock n roll!

Programmed via Mazatrol

 

[Scruffy887]

Sigh. Click bait. You are a student in a night school? But for sure a student. I for sure would run it. EXPERIENCE! Do you think an 18" carbide saw blade can cut cleanly through a 1" x 1.5" steel bar? At 4000 RPMs? 100 meters/min feed? Hell yeah it can. Cut through 2 of them like nothing. There were 3 in a row and there were no teeth left for the third bar. Bad EPROM and air freight from Germany and installation was back on schedule. Sure as hell woke us up.

 

[sendithard]

Sigh. Click bait. You are a student in a night school? But for sure a student. I for sure would run it. EXPERIENCE! Do you think an 18" carbide saw blade can cut cleanly through a 1" x 1.5" steel bar? At 4000 RPMs? 100 meters/min feed? Hell yeah it can. Cut through 2 of them like nothing. There were 3 in a row and there were no teeth left for the third bar. Bad EPROM and air freight from Germany and installation was back on schedule. Sure as hell woke us up.

I literally recently signed up for the site you goof ball. Do you have any brain cells? I'm simply the guy that pays attention to fundamentals that you don't like.

 

[Volitan]

Today, the instructor tells him I am wrong and to run the 3/4" HSS endmill at max rpm(10,000), b/c we are only cutting at .4 doc.

Please try to get a cell phone video when he runs this.

 

[Radar987]

I've learned a ton from my machining tech instructor

No you haven't.

 

[Scruffy887]

I literally recently signed up for the site you goof ball. Do you have any brain cells? I'm simply the guy that pays attention to fundamentals that you don't like.

Some advice. Don't call people names, makes you come across as an asshole. Do NOT assume the brain cell count of anybody you have never met in person. I doubt you are qualified to hand me a caliper by what you post, but you may be a fookin brain surgeon (well junior brain surgeon). And I like fundamentals, and for damn sure like to push them in most aspects of my life. Comfort zones need to be tested and expanded. Run the program, push till something breaks. Back off just enough to git er done.