Brilliant introduction to an arcane topic. Very glad to have found your video - gets me started from a point of my ignorance! Thank you so much.
@sergeykochubey630
3 жыл бұрын
Thanks man, my respect. nice explanation. Please continue.
@selvarajandrew4282
4 жыл бұрын
OK sir. I don't no English. But I understand.
@velcrodreams178
10 ай бұрын
Thanks man !
@iamjustaguy9777
3 жыл бұрын
Amazing video thanks so much.
@geckoproductions4128
3 жыл бұрын
THANKS!
@dileepgatkhane8719
2 жыл бұрын
Nice video bro
@santopezzotti730
Жыл бұрын
great Video. But how do you calculate the feeds
@StuartdeHaro
Жыл бұрын
I happen to have a video on that as well. kzitem.info/news/bejne/yZWhvputhpdefIo
@Petrolhead66
6 жыл бұрын
Another question, is this for HSS or carbide
@petergregory5286
6 жыл бұрын
Hi, Very watchable as are the rest of your videos. One question however, what SFM would you use for cast iron, bearing in mind the varying qualities of that material. Regards
@StuartdeHaro
6 жыл бұрын
I usually use 100 for cast iron. Cast gets a lot of grief for being dirty to machine, but I personally love working with it.
@peterbrockley
Жыл бұрын
@@StuartdeHaro I've used 70 in the past, but that was before the outer skin from casting was removed, then 90
@krishansharma3957
6 жыл бұрын
sir from where you got that data of SFM . different site say different SFM that is why i am confusing so please tell .
@StuartdeHaro
6 жыл бұрын
These are the numbers I use for my students at the local community college. They are meant to be used for high speed steel tools and are very conservative to make sure their tools last through the class. Also, that minimizes the number of crashes. You can plug in any number you would like into the formula, but make sure the cutting speed you use corresponds to the material you are cutting and the type of tool you are using. You really don't want to use a carbide cutting speed with a high speed steel tool. Thanks for watching!
@razaahmad7633
2 жыл бұрын
is this same for flutless tap RPM calculation???
@StuartdeHaro
2 жыл бұрын
No. In general taps are run slowly since they will self-feed once they engage. They can be run faster on CNC machines with rigid tapping since you can program the feedrate to be the same as the pitch, but you still don't want to go too fast.
@selvakumarant3076
5 жыл бұрын
Dear sir,can you tell me which book teach me basics of CNC and which book would you like top refer to find the formula as you mentioned above.
@jeetenderkakkar7570
3 жыл бұрын
Which pulley is used in sugarcane machine and belt
@Valkaneer
5 жыл бұрын
What sfm for hardened steel around 58-62 Rockwell? 30ish?
@StuartdeHaro
5 жыл бұрын
For something that hard I would use a carbide endmill. With that, I'd start in the 90-100sfm range and make adjustments as necessary. Slow it down if it squeals or throws flaming chips. If the chips are brown or deep blue, you're fine. Pale blue means the speed is too fast and you should slow it down. I hope this helps. Thanks for watching!
@douglaspierce316
6 жыл бұрын
I give you A+ thank you
@vorapobautomation9760
2 жыл бұрын
How to calculate from RPM to MPM. ?
@StuartdeHaro
2 жыл бұрын
Just turn your math around a bit. [RPM x (Pi x diameter)]/1000 = M/M. I hope this helps. Let me know if you have any other questions.
@sc1999
3 жыл бұрын
silly question, im in the Uk and just learning. does this still work or how does it work in Millimetres ?
@sc1999
3 жыл бұрын
lol forget that, just need to watch more :)
@StuartdeHaro
3 жыл бұрын
I was scratching my head thinking, "Didn't I cover that?" Thanks for watching!
@sc1999
3 жыл бұрын
@@StuartdeHaro yeah lol, just as you finished the working out I paused and posted, then 3 seconds later you said “don’t worry haven’t forgot you metric boys” serves me right. But thank you very well explained.
@sc1999
3 жыл бұрын
Just to check my maths (I’m completely new to lathes, basically just at the turning it on stage) RPM = for mild steel is 27, so 1000 x 27 divided by 3.14 then times diameter, say 25mm ??
@StuartdeHaro
3 жыл бұрын
@@sc1999 (27 x 1000)/(3.14 x 25) = 27,000/78.5 = 343 RPM.
@KJR1905
4 жыл бұрын
Why do you get different rpm when doing the same values but in metric
@StuartdeHaro
4 жыл бұрын
Mostly because the 4 in the formula is an approximation of 3.82, as I said earlier in the video. 3.82 comes from 12/pi, so it converts surface feet to surface inches. If you use 3.82 instead, you should get roughly the same RPM, give or take a bit for rounding errors between units.
@KJR1905
4 жыл бұрын
@@StuartdeHaro thanks for the response. I’m trying this for the first time and my maths is terrible. When I use your example for aluminium (using 3.82) I get an rpm of 1528 When I try to use the metric formula I think I get an rpm of 1364. Is that correct?
@StuartdeHaro
4 жыл бұрын
You should be getting a lot closer than that. Are you using the same cutter size in each problem (i.e. 6mm = .236")
@KJR1905
4 жыл бұрын
@@StuartdeHaro Apologies😊 I tried to use the same as in the example 3/8 which I inputed as 9.525mm in the metric example. 1000*45/3.14*9.525
@KJR1905
4 жыл бұрын
@@StuartdeHaro tried it several times not sure what I’m doing wrong. With imperial I get 1528 With metric 1000*45 / 3.14*9.525= 136,504.4077
@sushantkumar2631
6 жыл бұрын
sir how can we use it in metric valve ..if tool dia is 25 mm and material is mild steel....pls tell me the formula
@StuartdeHaro
6 жыл бұрын
I show how it's done in metric starting at 9 minutes and 19 seconds. Here's the link: kzitem.info/news/bejne/tJBqt4BsbYyErIY
@jeetenderkakkar7570
4 жыл бұрын
Hello sir How to calculate speed from rpm
@StuartdeHaro
4 жыл бұрын
It's pretty easy. You'll know your rpm, diameter, and our constant of 3.82 (or 4 if you want to round), so just turn around the math a bit to be RPM x diameter/3.82. Thanks for watching!
@jeetenderkakkar7570
4 жыл бұрын
@@StuartdeHaro Hello sir How to calculate speed from diameter
@felixf5211
3 жыл бұрын
@@jeetenderkakkar7570 There are pulley calculators online. Run a quick search. Good luck.
@krishansharma3957
6 жыл бұрын
I love you sir. Sir can you tell me something about westermann table book please.
@highstreetkillers4377
6 жыл бұрын
Drill length is the 2nd biggest factor after the diameter. I use a 9/16" longer than my leg in P20. I get using 4 on a manual but that is so wrong, machining is precision, that math should be accurate then round the rpm
@sidewind131258
6 жыл бұрын
I think that you have an error in your metric calculations. When I try it, I get a result 4 times faster than your inch calculations. Aluminium is 150 sfm = 45 meter/ min = 45000 mm / min Endmill is 3/8 = (25.4mm / 8) x 3 = 9.525mm Calc then is as following acording to you: 45000mm/min x 4 = 180.000 divided by (9.525 x 3.14) 29.9085 = 6018 rpm Where do I go wrong ? Otherwise very informative videos. Maybe not as detailed as TubalCain's but still as informative. Greetings from Denmark.
@StuartdeHaro
6 жыл бұрын
I see what you did. You used the 4 from the inch calculation in the metric one. It should be (1000 x 45)/(3.14 x 9.525) or 45000/29.9237=1503rpm. You did all your math correctly until the end when you put 45000 x 4/29.9237. That 4 is only for use with surface feet per minute, not meters per minute. Let's do a quick double check of the same material and diameter in inches. 150 x 4/.375=1600rpm. The difference is because 4 is rounded up from 3.82 (shown at the beginning of the video). If we use 150 x 3.82/.375 we get 1528rpm. The remaining difference in rpm is because of the various roundings that we did going from inches to meters. I hope this helps. Thanks for watching!
@sidewind131258
6 жыл бұрын
I feel so ashamed, usually I'm a math shark, and after reading your explanation, maybe I should go back to school. Of course I don't need that multiply of 4. the small fractions don't bother me, it was that I got a so big difference that made me write. My humble apologies, and keep the good stuff comming :)
@StuartdeHaro
6 жыл бұрын
My first thought was, "Oh no, that video has been up for 10 months! Did I really make a mistake?" I'm glad I didn't. Either way, you got me thinking first thing this morning and I always appreciate that. Thanks for watching!
@sidewind131258
6 жыл бұрын
Just back from my litle shop this morning, and lo and behold, it worked, no chatter, no squeals, just smooth as a baby's but :) Thank you so much
@StuartdeHaro
6 жыл бұрын
You're very welcome!
@UsmanAli-ft4zh
10 ай бұрын
3rad of one
@DITH85
2 жыл бұрын
Late to the party I know but does this mean that in metric it would be S(cm)M x 3.18/diameter? If constant = 10/pi? As the 3.82 in imperial is a product of 12/pi, feet to inches. So the constant in metric would be cm to mm ? Ie; divide Pi by 10. Is this correct to solve for Surface Centimetres Per Minute?
@StuartdeHaro
2 жыл бұрын
The metric explanation starts at 9:19 and you're using meters/ minute.
@DITH85
2 жыл бұрын
@@StuartdeHaro omg I feel like and idot. Hahaha. Watch. It. Until. The. End. *facepalm*
@Scorpio888
6 жыл бұрын
Sir i have 29 hp d engine 2200 rpm with 6 inch pulley. Tell me water fan pulley size? Because i have 8 inch water fan pulley. In this position tube well water though is best but engine on some fast speed?
@brianhamilton6123
3 жыл бұрын
1600.8675309 RPM, HAHA, IDK if anyone else picked up on that but I got your number lol
@StuartdeHaro
3 жыл бұрын
3 years and 169k views and you're the first to mention it. Kudos to you and to Tommy Tutone!
@robertoswalt319
4 жыл бұрын
Thank you so much for this wonderful explanation. I have been frustrated trying to figure out sliding calculators and the machinery handbook. Now I understand and have written this down on and prominently displayed in my shop. Your students are fortunate to have you as an instructor.
@engelbob8402
5 жыл бұрын
Nicely done. It is disappointing to see so many viewers and so few likes. You deserve more recognition for your effort.
@najimuddin-1170
Жыл бұрын
I'm from Bangladesh. nice explain. 🥰😍
@SaleCNC
4 жыл бұрын
For CNC, you get 1600rpm for aluminum, then how to calculate Feed rate?
@StuartdeHaro
4 жыл бұрын
RPM x flutes x chipload = feedrate. Flutes is the number of edges you have on your cutter. Chipload is the amount you want each flute to remove. Generally the most you want for chipload is 1% of your cutter diameter. Use less chipload for a better finish on your finish cuts. I have a video on this as well. I hope this helps. Thanks for watching!
@SaleCNC
4 жыл бұрын
@@StuartdeHaro Can you kindly do a sample for us? We just want to use CNC Lathe to cut steel. Don't know how to calculate feedrate.
@StuartdeHaro
4 жыл бұрын
Lathes are a bit different. The feedrate is given in inches (or mm) per revolution of the spindle. Your insert manufacturer probably has recommendations for the feedrate, but as a rule, I start around .004"/rev (.10mm/rev) and then start playing around with it until I get the finish I'm after and the chip is coming off cleanly. Sometimes the chip won't break or curl. It depends on the material, but if your finish is good, then no worries. I always start conservatively and then keep bumping it up to see what I can get away with.
@Petrolhead66
6 жыл бұрын
Great video, to clarify for metric. Say I have a 1” (24.4mm) dia alloy bar. The calculation would be 45000/(3.142x25.4)=564rpm. If I was working in imperial it would be 150x4/1=600rpm
@StuartdeHaro
6 жыл бұрын
The difference is because the 4 in the imperial formula is an approximation of 3.82. If you do the math with that it comes out to 573rpm
@cristianilie8857
6 жыл бұрын
I've been watching a lot of videos lately for better learning how to use the lathe and mill and this is my favourite so far! Thx for the info and keep up the good work! All the best from Romania!
@StuartdeHaro
6 жыл бұрын
I'm glad you like it. Thanks for watching!
@miauur7873
25 күн бұрын
How about the feeds ??? Thank You very helpful
@StuartdeHaro
25 күн бұрын
@@miauur7873 Here you go: kzitem.info/news/bejne/yZWhvputhpdefIosi=MbOyiL1is4L4B43s
@seabeckon
5 жыл бұрын
Thanks for the metric calibration of RPMs very helpful.
@CaptainSwoop
4 жыл бұрын
Excellent presentation. Thanks from Australia
@waltrichardson3246
5 жыл бұрын
Really like this explanation, I also teach machine shop math and this is much better than what is in the book. The book recommends rpm= fpm x 12 over Pix D but I also prefer the use of sfm x 4 over, much simpler, but I guess I had never taken the time to discover why the use of 4, had just been advised to use that by another machinist. Thanks again.
@kittiesletsgo
2 жыл бұрын
Hello guys, I want to know the force needed to cut a pipe. May I ask where to start from there? For example a 4" PVC pipe. Using a 2" circular blade.
@johanvantongeren82
4 жыл бұрын
Great video! I was about to go and convert these weird imperial measurements to proper metric, but then you saved me a lot of time in the end 😬 thanks!
@esachan_
Жыл бұрын
Do you have, like, a reference book for this? Thank you.
@StuartdeHaro
Жыл бұрын
Not specifically for this but it's covered in pretty much every machining textbook.
@sheldonbrooksugarhouse7612
2 жыл бұрын
Just found this tutorial. Thank you, they are clear concise and very helpful.
@tectopic
5 жыл бұрын
Excellent informative video. Thanks. And a plus for using a HP RPN calculator!
@StuartdeHaro
5 жыл бұрын
You know, I have absolutely no idea where or when I got that calculator. It seems like I've always had it. It is a great calculator though. I wouldn't trade it for anything. I use a TI-30Xa at work. Also great and very reasonably priced. Thanks for watching!
@userwl2850
5 жыл бұрын
For the metric folks 🤣 most of the steels I cut HSS wouldn't even scratch it. Excellent informative video 👏🏻
@StuartdeHaro
5 жыл бұрын
You really have to love those metals where your SFM with high speed steel is 10 or 15, or they're just flat out harder than HSS tools. I figured that was a rabbit hole I didn't want to fall down in this video though. Thanks for watching!
@robertchiscop3282
11 ай бұрын
Can I applying this for metric units?
@StuartdeHaro
11 ай бұрын
Yes. I cover that at 9:18.
@tivnator
6 жыл бұрын
Wonderful, merveilleux, so clever and simple thanks
@arunvishwakarma5414
3 жыл бұрын
Aapse mera ek question ❓ hai Hamara roll daya 272mm hai Gear ratio 1.62 hai to Hamein stand ke rpm nikalne hai to kaise aayeag
@landar1862
5 жыл бұрын
You mention to double the sfm for carbide tools. Would you recommend even faster speeds with carbide tools with high heat coatings (i.e. 1700F+)? 3X the SFM listed? Great videos by the way.
@nilashahul1066
5 жыл бұрын
SS 316 metril parting tool spindle speed Or feed rad ?
@StuartdeHaro
5 жыл бұрын
You want to run parting tools slower than normal tools because you have a lot of flexibility in the tool and a lot of it sticking out. The most important thing is to make sure the center height of the tool is perfect and the tool holder is square to the part. Otherwise you are asking for trouble. Feedrate can be kept the same as turning, however, if you are parting solid stock on a manual machine you probably want to finish it by hand, not under power feed. That last bit in the middle is when things like to go badly, so having some feel in that situation is very good.
@GunsWithGage
6 жыл бұрын
Thank you! About to buy my first real machines. Practicing with a mill drill right now
@prasadjoshi9614
4 жыл бұрын
Really informative... Please upload more,if with program possible... thanks.
@danmccurry3810
2 жыл бұрын
Thanks for speeds and feeds in a nutshell, I have learned through the years working at various Manufacturing companies, most machinist pic speeds and feeds from tribal knowledge on the machined parts history, memory or trial and error. It's more costly so this technical information will be helpful at any level or skill! It's great that you noted the suppliers of cutting tools and production expectation speeds verses nonproduction or manual time. Thanks for posting this helpful Gem!
@sonuverma2796
2 жыл бұрын
Sir that formula applicable for cnc router for portrait designing Engraving on iron
@StuartdeHaro
2 жыл бұрын
It should work on any rotating cutter. You just need to know the cutting speed for the material.
@sonuverma2796
2 жыл бұрын
@@StuartdeHaro sir I have several portrait designing stl file whom I want to engraving on iron but I have no idea about spindle rpm,step over, feed rate and plunge and step down, so how to calculate it, my cnc is chaina made and it's mach3 controller have RJ45connector
@StuartdeHaro
2 жыл бұрын
@@sonuverma2796 It’s a bit out of my wheelhouse, but with most engraving you'll be using a very pointy cutter. That point is not moving very fast, even at high RPM, so you’re usually going to be cutting at the max RPM. Check with the cutter manufacturer to see what they recommend for speeds and feeds.
@PALM311
5 жыл бұрын
Thank you,Thank you,Thank you! There is a light!
@MegaRiffraff
4 ай бұрын
👍🏻
@shankarkulkarni7763
5 жыл бұрын
how you talk .375/.3125/.250 plz tell me sir
@What-is-thehandle
5 жыл бұрын
3/8 of an inch = 3÷8=.375 1/4 of an inch = 1÷4=.250
@josemane4497
4 жыл бұрын
How do you calculate this sir you have to machine an 18-8 stainless steel shaft with an external diameter of 76 mm.what speed in Rpm would you set the lathe to if you're using a a) high-speed steel tool b) brazed-tip carbide tool What does that 18-8 means
@StuartdeHaro
4 жыл бұрын
I go into how to do the metric calculation starting at 9:20. For a high speed steel tool, your RPM would be around 50. For brazed carbide, you are probably safe to double the cutting speed to 24 meters/minute, so your RPM would also double to 100. 18-8 is the alloy of stainless. It is made up with 18% chromium and 8% nickel.
@sprabhakar579
Жыл бұрын
Thanks
@EvoKeremidarov
3 жыл бұрын
Thank you
@billmacfarlane4083
Жыл бұрын
That's going to be so helpful figuring out approprate speeds for my lathe. Thanks for that. Would these speeds equate to bandsaw blade speeds? How would you work that out?
@StuartdeHaro
Жыл бұрын
Bandsaw blade speeds seem to be a bit higher, probably because each tooth is contact with the material very briefly. You can find charts all over the interwebs with blade speeds. I'd recommend using the one provided by your blade's manufacturer.
@genuzz
3 жыл бұрын
#Cerritos college here I wish you were my MTT class teacher!
@theartman410
2 жыл бұрын
Thanks for the schooling.
@StuartdeHaro
2 жыл бұрын
You're very welcome! Thanks for watching!
@ducluong8482
3 жыл бұрын
Great video to learn 👌 Thank you, hope to see your next video, thanks again 😀
@regb8535
4 жыл бұрын
Thank you, very clearly explained
@joemariollosa9497
3 жыл бұрын
Thnx
@hiiitek9053
Жыл бұрын
Just got into a tool and die maker apprentice program at my job of which there’s manual mills and lathes and only one CNC machine and a big problem I had was understanding the speeds and feeds your video helped a lot wrote it all down and posted it in my Toolbox at work for reference 👍
@StuartdeHaro
Жыл бұрын
Well good luck! Let me know if you have any other questions. I'm happy to help.
@DoctorTooploop
3 жыл бұрын
ok but how do i calculate SFM
@StuartdeHaro
3 жыл бұрын
Easy. Just flip some of the numbers around. SFM = (RPM x diameter)/4 (or 3.82 if you're using the non-approximated version).
@NOOne-im5vg
6 жыл бұрын
Excellent explanation and use of examples.
@StuartdeHaro
6 жыл бұрын
I aim to please. Thanks for watching!
@letsgoBrandon204
4 жыл бұрын
So the equivalent metric equation with the constant multiplier would be; RPM = (SMM * 318.31)/DIA in mm ? I'm still resisting Imperial measures with all the fibre of my being (even though our stupid country measures road speeds and distances in MPH and miles 🤪)
@StuartdeHaro
4 жыл бұрын
I go over the metric formula at timestamp 9:20. I have no problem working with either system and I think most US citizens are pretty flexible in that regard as well. We just like cracking jokes about freedom units and stuff like that. Just remember, accurate work can, and has, been done in both systems. In the end, it doesn't matter how you measure it as long as the finished product works as it should.
@letsgoBrandon204
4 жыл бұрын
@@StuartdeHaro Quite. Couldn't agree more. I'm just comfortable with mm. I wish my brain worked like one of my older colleagues. He's a magician with the manual lathe and can use either measurement system on the fly. OMG, I've been indoctrinated by Système international 😨
@20MaRk23
3 жыл бұрын
Somethings wrong here Milling (Metric) Mild steel (material thickness 20mm)(1000×27÷3.14×20) = 171,974.52... sorry I don't know what I missed here, is it 171 RPM, if so that's seems really slow 🤔 or is because it should be the thickness cutter tool in Mill not material thickness like lathes??
@Trey0918
5 жыл бұрын
What is sfm compared to CS
@StuartdeHaro
5 жыл бұрын
They're two different ways of referring to the same thing.
@ezeobisochima9944
3 жыл бұрын
A nice tutorial, Please which of the diameters, is it the diameter of the cutting tool or the diameter of the work piece you used in that formula.
@StuartdeHaro
3 жыл бұрын
It depends on the machine. On the mill, it's the diameter of the cutter. On the lathe it is usually the diameter of the workpiece unless you are drilling or boring a hole. Then it's the diameter of the hole.
@trebornirtus6514
5 жыл бұрын
I’m learning a lot from your channel thank you just picked up my first mill yesterday
@StuartdeHaro
5 жыл бұрын
Congrats on the new mill! What did you get?
@trebornirtus6514
5 жыл бұрын
Stuart de Haro nothing fancy mill/drill from grizzly GO758 it’s a starter rig
@GcVoct
5 жыл бұрын
Very good presentation.Thank you very much.
@vorapobautomation9760
2 жыл бұрын
How to control tension of winder roller of warper machine ?
@AlexTrain5249
4 жыл бұрын
My high school teacher actually used your videos for a quiz. It certainly worked well.
@StuartdeHaro
4 жыл бұрын
That's awesome. Tell your teacher they have impeccable taste!
@fabuloustshirtsonline
Жыл бұрын
How do you calculate rpm for threading?
@StuartdeHaro
Жыл бұрын
When I'm threading I'll run the machine slowly so I have plenty of reaction time. I mainly judge the RPM by how fast the threading dial is moving. If it takes forever to turn from number to number, I know I can speed up. If it's zipping by too fast to reliably engage the half nuts then I slow down. Check out my video on threading at various RPMs. kzitem.info/news/bejne/02OYq3aPi3WJdpg
@fabuloustshirtsonline
Жыл бұрын
@@StuartdeHaro Thank you so much for responding !
@StuartdeHaro
Жыл бұрын
@@fabuloustshirtsonline You are very welcome. Thanks for watching!
@vorapobautomation9760
2 жыл бұрын
How to control 2 roller winder and rewinder which speed setpoint and diameter calculate from PLC ?
@StuartdeHaro
2 жыл бұрын
Sorry. I can't help you with that one.
@plebe791
2 жыл бұрын
Thank you, very helpful tutorial,
@terrypickford627
2 жыл бұрын
Thanks. You make this so easy. Couldn't quite get it from reading a book.
@StuartdeHaro
2 жыл бұрын
You're very welcome. I'm glad it helped.
@Doug_Edwards
5 жыл бұрын
If you were using an end mill with multiple flutes how do you calculate? Thanks for the video.
@StuartdeHaro
5 жыл бұрын
The RPM is not affected by the number of flutes, only by the diameter and the material being cut. Flutes do have an effect on feed rate. I have a video on that subject.
@Richierich582
7 жыл бұрын
could you post the information where I would be able to copy it? Thanks, Bill
@Valkaneer
5 жыл бұрын
I run manual Bridgeport at my shop. The leader who's been teaching me over the last few years always just gives estimates for RPMs. There has to be two different formulas, you don't run end mills and drills at the same RPMs. The formula given to me for drills was 229.2 divided by the diameter. But they've never given me the formula for endmills. Also, don't the number of teeth or flutes matter?
@StuartdeHaro
5 жыл бұрын
I'm not sure where the 229.2 came from, probably from an sfm x 3.82 (that would make it 60sfm). You shouldn't use a single number for speeds because the sfm varies from material to material. You can run endmills and drills at the same RPM. You run reamers slower (half the speed as the same sized drill) and I always run countersinks, counterbores, and anything else that has a lot of tool in contact with the part slower than calculated to avoid chatter. The number of flutes comes into play when you're figuring out your feedrate. I have a video on doing that as well. Thanks for watching!
@Valkaneer
5 жыл бұрын
@@StuartdeHaro Yeah funny thing is after I watched your video I was talking to my leader at the shop and I was telling him what you were saying that he started looking of into himself, and he was surprised to find out that they seem to use the same formula. One of the reasons he really started looking into it was we have a engineer at the shop who thinks he's an expert in programming that was running a Haas CNC (extremely light duty machine). And he was running a quarter inch end Mill at about 6000 RPM's. You could hear it screaming all the way across the shop. We were joking that the machine was vibrating so badly that it was going to walk right out the door.
@oh8wingman
3 жыл бұрын
So do these numbers change for carbide or carbide insert tooling?
@StuartdeHaro
3 жыл бұрын
Yes. Generally carbide can be run 2 to 3x faster than high speed steel. Of course, manufacturers of inserts will have their own sfm numbers, so check that information. Keep in mind that those numbers are geared towards production with rigid machines, so they may not work on smaller machines or where tool life is more important than short cycle times.
@kamdevkumar9897
3 жыл бұрын
Gear se dc motor ka rpm nekane ka matalab hindi me
@darrenhoffmann7114
5 жыл бұрын
Thanks mate, just the info I was after, and thanks for the metric for the rest of the world
@chesitojlf
3 жыл бұрын
Hi Stuart D Haro Great info, i recently started at a smaller machine shop. They have me run a old turret lathe for drilling parts. The machine seems to run speeds 56-265, ¿is that the rpm? Ive been drilling 1018, 1215, 1045, 4140, 4140 HT, 410, 17-4 ph, 316, duplex 2705. I use both carbide tips (they call it a spade). Also use a regular drill (i imagine its a high speed drill). I've been having a problem with chipping and breaking the tools recently even though I've used those speeds a few times for the same material. Do you know where i can get a more specific or larger list for sfm on different metals?
@StuartdeHaro
3 жыл бұрын
I'm sure that would be the RPM. Depending on the size of the drills, that may be really slow and that could explain your breaking and chipping issues. At slow speeds, it is really easy to take too heavy a feed on the drill and break it.
@chesitojlf
3 жыл бұрын
@@StuartdeHaro Oh ok, i was running 17-4 ph at 88 with at new carbide spade and it was really noisy, but they said noisy is ok for that material, but the spade broke. Do you know where i can find a chart or list for more specific types metals.
@chesitojlf
3 жыл бұрын
@@StuartdeHaro i imagine theres somebody kind of equation to find rpm using the brinnel hardness of material. Do you know of one?
@StuartdeHaro
3 жыл бұрын
@@chesitojlf I do not. Sorry.
@bambiluong9759
4 жыл бұрын
the best explain sir ,thank you.
@hilltopmachineworks2131
2 жыл бұрын
Good tutorial.
@zjtr10
2 жыл бұрын
Most Excellent! Thanks
@MrAllanwinks
6 жыл бұрын
Very well done , thank you.
@Butterbean00
7 жыл бұрын
This was very good teaching. Wish I could take the class. Thanks.
@binobyslar
3 жыл бұрын
Please what's your recommended SFM for woods
@StuartdeHaro
3 жыл бұрын
I'm not sure, sorry. I never work with wood.
@mohammedmal6128
3 жыл бұрын
From where the 3.3 came from?!
@travisgowen6594
5 жыл бұрын
Great explanation. Thank you!
@pradipmaheshwari217
6 жыл бұрын
Thanks for Metric......
@mitchelle05
3 жыл бұрын
Stuart, sir Do you have a video that discuss about feed rate in lathe turning?
@StuartdeHaro
3 жыл бұрын
No I don't. It isn't as clear cut with the lathe. There are a lot more variables. Generally, if you keep the feedrate less than the radius on your tool you should get a nice finish, but don't get too aggressive. I usually get good results with .002-.004" (.05-.10mm) per revolution. You'll find that you need to adjust on the fly to get the chip to break, especially as the diameter gets smaller but your speed stays the same. You will have to play around with settings to see what works on your machine with whatever material you are using.
@mitchelle05
3 жыл бұрын
@@StuartdeHaro thank you for the reply sir, your videos are big help,
@markdobson4505
5 жыл бұрын
Excellent explanation!
@devindradm7468
4 жыл бұрын
Kannada video oplod madi sir
@whoareyou221
6 жыл бұрын
How did you get 150 for aluminum and 90 for mild steel?
@StuartdeHaro
6 жыл бұрын
Like I said in the video, these are the numbers I use for my classes at the local community college. They are meant for high speed steel tools and are pretty conservative numbers to keep the students from crashing the machines. You can find a lot of SFM charts online with wildly varying numbers. You just have to be aware of the cutter material the chart is for (HSS v. Carbide) and the fact that most of those charts give production oriented numbers that are meant to maximize productivity and not tool life.
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