Milling 304 Stainless with a Carbide End Mill | Speeds and Feeds Tool Test
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- čas přidán 22. 10. 2019
- Milling 304 Stainless Steel can stink if you aren't sure where to start. Even if you can, are you getting the most out of your end mills?
In this video, we cover how to find a speeds and feeds starting point and how to tweak the recipe to achieve your specific goals., whether it be maximizing tool life, process reliability, better surface finishes, OR higher material removal rates.
We'll use two different machines, the Tormach 770 and the Tormach 1100M. PLUS, we'll explore the impacts of coolant methods (fogbuster vs. flood) and other ways to push your tools further.
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Links for this video:
Better Speeds & Feeds? provencut.com
Shop Microscopes | bit.ly/2LParmv
Helical & Harvey Tool Library Download
bit.ly/2AMaNqv
Helical 3 Flute, Corner Radius - Variable Pitch
bit.ly/2LUzKGH
Speeds and Feeds Basics on NYC CNC
bit.ly/2uCrf9b
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Reach us / CNC Info:
Manufacturing Entrepreneurship Resources:
www.nyccnc.com
Online Fusion 360 Training: bit.ly/LearnFusion
Hands-On CNC Classes: www.nyccnc.com/events
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I discovered machining as an adult and am grateful to have found something I love and can share with others. We hope NYC CNC not only makes you a better machinist but helps you understand and learn more about how to succeed as a manufacturing entrepreneur! 5 Reasons to Use a Fixture Plate on Your CNC Machine: bit.ly/3sNA4uH - Věda a technologie
“Proven Cut”… what a great name! Super easy to remember, catchy, and informative! I’m gonna check it out right now…. Thanks John!
When working with small, short endmills like this having thru spindle coolant and an unsealed collet is a real life saver. Nothing can block the coolant if it’s coming from the tool.
As a novice with a Chinese mill, I learnt a huge amount on this video. Thanks :)
hello from uk been an engineer for 12 years now on both sides of the technology front. for all those people who still using the old bridgport universal mills, a little trick i learnt to get get deep slotting in high carbon steel like en24t even with fairly rubbish hss 3 flutes end mill and two flute slot mills 4mm and below if set your rpm a little on the slow side 1500-1800 and keep your feed rate low 40-50 mm a minute or 1.8-2 ipm with a constant stream of coolant directly at the cutter. it doesn’t have to be high pressure just enough to wash the chips behind the tool and most important thing you want in a good holder side lock preferably, rigid as possible and it will just chug right on through I’ve got ten or so slots like this out one little hss end mill
Hi we find that when we use a 63 mm diameter 6 tipped cuter to machine p20 the vibrations running through the spindle knock the machine out and when we talk to the tip supplier cutwell they ask what machine and we say Bridgeport interact and they say arrr sorry but you don't have enough spindle speed you will need to take out some tips or run the feed slower, we love our machine and never run it in anger it's a shame we carnt get the modern fast tools to work as designed, we've had it new since 1988 and a cracking m machine
The Bridgeport mill design is wonderful and has made half the stuff in the world, but it is at least 80 years old now. Modern CNC machines are far more rigid and have more power, and run faster spindles and usually have higher coolant pressures and flows. Modern tooling is designed for the modern machines, not for an 80 year old machine design. Its reasonable to have to downgrade the tool or its capabilities to handle the slower, less rigid machine.
I'm not knocking the Bridgeport in any way. I've got one and love it. But it's just a fact that modern tooling isn't designed for its capabilities, and you sometimes have to make adjustments.
GREAT VIDEO! Super informative, clear to see how much of a difference flood coolant makes-great advert for proven cut too. More content like this please
I've been slotting steel plates with a 3/16 endmill for the last week, Kennametal HPHV > Guhring Diver. 25 degree ramp, 5,100 RPM, only 5 IPM ramp, 12-16 IPM slotting. Can't wait to try the new TE they came out with for slotting. Sounds like a provencut test extravaganza.
As for process reliability I am getting like 40 plates per tool with those feeds and speeds (10 gauge plate, ~0.130" thick), and believe me there is a lot of slotting involved--they are 5 inch circles with a 2 inch bore and like 15 smaller slots per part.
Here's to keeping it in-house.
If anyone is wondering, the TE is a lot like the Guhring diver, it sacrifices a lot of harmonic chatter reduction for stiffness which isn't exactly the best for a thin steel plate screwed down in a few places. Harvi 1 is by far the best tool for that sort of thing, fantastic little tools.
Gaaaah! I had no idea you could search by EDP number in those tool libraries. You just saved me a ton of time!
Super useful, concise, and well made video.
Superb video, thank you! I've learned so much!
Great video John!
I really like Inco's hard-coated 4-flute mills for slotting and profiling tool steel. I used some at my first machinist job when I was making fixtures and I was very impressed by their performance compared to most other tools for hard metal milling.
Thank you very much, this was very educating.
I run Helical in 304/304L everyday, full slotting as well. Nothing beats them. I love their products.
5:14 I'd still go to move in the other direction so the chips get blown out to the free space your creating with the slot. Same goes if you only have coolant from 1 direction. I had that on a job. Same recipe, one direction was fine but the other one (as in your vid) caused the tool to recut all the chips and break.
Great real-world example (especially those damn slots :) !
Nice test, I see some serious tool deflection with the deeper cuts.
This is very good ! (Really very good). Machine Advisor Pro doesn't seem to have a "Beast Mode" dial or button ?
Nice video
I would be curious to see what D.O.C. the tool can truly handle with TSC coming through the collet and around the tool.
I've found the dual head fogbuster works so much better for slotting if you throw away the stock bases and get the nozzles down low and pointing in towards the tool more horizontally, rather than the standard mounts that have the nozzle tubes up high and having the collet nut be in the way.
When are you gonna get a horizontal machining center? That's gotta be nice for chip evac.
that last cut the coolant is also hitting the chuck holding it so it was gettin double blocked from being so low and the outside
I usually just use a sfm of 125. Works great. Also do flood coolant
I'm a big fan of good solid endmill holders over the ER collets, especially for slotting as they are significantly more rigid. Also they have a smaller profile and are not as much in the way of the coolant.
I am surprised you want to aim the coolant at the back of the cut. I always figured that would push chips into the cut rather than away from it.
Also, have you considered a tip with a smaller hole on your coolant/fog buster nozzle to have a more direct and higher psi flow?
You didn't try a multi-pass cut for a deep slot. In that case a longer flute length might be beneficial so that the chips can flow up the shank and out of the cut.
I'd also be interested in the effect of a longer coolant pipe(s) that actually get down under the face of the collet or tool holder, right near the shank of the mill.
Is the toolpath used in cutting letters (signs company) from a steel sheet also considered as full slotting?
John, what is the orange part around the fogbuster? What Coolant do you use with fogbuster and stainless steel?
Can you try this with 316L Stainless....would like to know.
Spindel cooling is a best way ! through tool holder .
how would you suggest adjusting these feeds for a ramped 2d contour toolpath? Or would it be better to plunge between stepdowns?
i mill 304 stainless plate, full slotting (profiling the outside of the part) .3125 deep with the Helical 4 flute 1/4" endmill at 400sfm and .0012ipt (6112rpm @ 29.33ipm) and get about 2 hours of in cut time out of it. not unhappy at all with it.
I always use through spindle coolant to these types of jobs, no worries about where the coolant nozzle is pointing.
good luck getting through spindle in a tool that small.
@@tylergarza8695 The tool doesn't need TSC holes in it, I just use ER collets that are sealed and have two holes for coolant, works great.
@@OMY005 oh, actually was not aware of this. Thanks.
I"m studying cnc machining right now so i'm still learning some stuff haha
@@tylergarza8695 czcams.com/video/3SBF8O194WA/video.html
At 150% axial depth of cut w/ mist cooling you were at about 230 sim and tool broke. However, when you went to compare to flood cooling you reduced the feed to 178 sim and it worked. That is not a valid comparison; you should have run with the flood coolant at the same parameters.Also, you were using an end mill from Helical (one of the best) at around $30.00. These details are important to me. I think that cutter would have made it thru if the 178sfm were used.
Great video!
Multiple DOC passes? Would take longer, but better reliability?
In a straight slot like that how is chip evacuation a factor? It seems to me like there's no opportunity to recut chips in that situation. At least on my 1100 I've found I can slot without any air, in 6061 and 4130 at least.
What if im cutting only shallow depth of cut? Can i increase the rpm and sfm? Im cutting 304 ss but depth per pass is .004" depth of cut.
Could you use a different tool holder? The ER20 collet shields the tool excessively...are there smaller diameter or tapered alternatives?
As always thanks for the info!!!
For sure - ER16 is readily available for TTS
Metric Numbers please
I would also like, I watched the whole video with calculator converting
I only have a hobby mill off of eBay for fun. Is it possible to mill steel with a 2 or 3mm end mill with only a max rpm of 2855rpm?
With either fogbusters OR flood, how about using smaller collets for the small tools to get more air or fluid to the edge? ER16 holders are available. I even have a pack of ER 11 collets in my drawer in case someone, sometime makes some TTS holders that can use them.
that fog buster got a leak maybe thats hurting the pressure?
Hey jon do a review of the cogsill 80mm bernashing head
I saw their sales video. Looks pretty cool. Expensive tool. I'd like to see it reviewed also.
I use Cogsdill Bore burnishing tools often to produce awesome smooth, and tight bearing bores, I can only imagine that everything they make is top notch.
I wish Helical sold their tools on MSC.
This being a resent video why in Fusion 360 does it show a Cam operation and not Fusions Manufacturing op?
I nit pick all areas in my machine. Especially coolant placement. Feeds an speeds are pretty much standard cause I cut cobalt chrome. So you can't push the tool much faster. But flood coolant ia a must. Makes a huge difference.
Why limit yourself to Cobalt?
@@frp1276 limit? I work in a medical shop. I make implants. What am is supposed to use???
@@Bighorse508 my mistake, I was thinking you are using only cobalt tools
@@frp1276 na. Cobalt chrome is the material. Carbide tooling is all i use
It's easier for the flood coolant if you hold the tool in bit longer weldon holder |||==-- something like this :D
Your fogbuster needs a bit of tuning and tightening up the connections. You can see it leaking through the orange housing.
flood coolant was and is always better
Can you tell them to update their App? The tool numbers from their website catalog aren't recognized in the App (Android). Waste of time.
Ain't got no coolant capability. :(
I thought this was a Titans of CNC video with that title. Just smashing a tool through a block of steel.
No.
@@nyccnc no definitely not. That's not real life. 😂
You are already using CAM software so why you slot with full A.O.C? Just use trochoidal milling. Its faster, more productive, less toolwear (smaller cutting forces, heat, better chip evacuation etc..), full depth of cut (4xD easily) and better accuracy. You dont even need CAM, program for simple trochoidal slotting isnt problem write manualy . I think its wasting of great mill to use just 1xD or 1,5xD and rest throw away or regrind. And cutting hard steels with cutting fluid isnt ideal. Mist would be better.
ps: And excuse my bad english ;-)
ehhh it's not usually faster imo..
Yeah, it really depends on what doing and slot width/length. Trochoidal milling is great, but like every process, it has it's downfalls, like machines not being to handle the code so you end up cranking up the smoothing option and lose the accuracy benefit. Also, I would never take the time to hand program that, copy and paste NIGHTMARE in my opinion.
@@donaldmoore8023 its possible but why would someone
He covered that in a different video
Slotting 304 with 1/8? Don't do that
I talked to the company that programed the impeller on your show about the guy from Canada on his DMU. They were at south tec this week. I now have a hard time believing your content now. You need to be real.
?? Can you elaborate?
Sure. Amish said he used power mill to program the impeller in the video but just a few seconds later said he had been using fusion 360 for everything on the 5th axis. Which is it? In my conversation at south tec I learned fusion 360 at 500 dollars a year cannot make his impeller but with cloud credits you can use other autodesk tool paths. We don't see that on CZcams from the autodesk users but that's what they have to do to replicate these programs. I'm pretty sure now that cloud credits don't come cheap and I'm pretty sure Amish paid for that program instead of generating it himself. Tell the whole story. That's all I'm getting at. I'd rather have the information than the marketing or the entertainment content. That content does not help manufacturers.
@@travisthomason8869 thanks