This KNOWLEDGE Will Ease Your Pain and Suffering When Attempting to Machine Perfect Parts

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@GeraldWentland 11 ай бұрын

As a experienced oil field machinist used to doing deep bore work If your looking for a good finish use a 55 degree D insert and back bore that same cut from inside to the face Chips will stay behind tool No chip rub or damage and it will be way better

@a-iz4pg 11 ай бұрын

Sorry, but is your name Titan of CNC? Didn't think so.

@christopherjones7191 11 ай бұрын

I find it interesting that the original comment did not discredit, nor refute Titan. Came in, gave reasonable advice and said where it came from and you all decided to immediately attack them.

@a-iz4pg 11 ай бұрын

@@christopherjones7191 Shut your trap, Globalist.

@joesikkspac7904 10 ай бұрын

Things that weren't addressed were taper in that long of a cut and going up in bar size in addition to the aforementioned insert geometry.

@neptunevinyl 10 ай бұрын

@@a-iz4pg Thank you for your comment! I'm with you 100%! I'm so sick of experienced machinists acting like they know everything. I dont need experienced machinists offering machining advice based on their years/decades of experience. I come to TOCNC to watch their videos and hopefully learn some new machining techniques. I dont come to TOCNC to learn new machining techniques from people who aren't part of Titans of CNC. These people who spam the comment section with different tips and tricks that they've learned over decades of trial and error are so obnoxious. I'm glad you spoke up and let all of them know that WE DONT CARE ABOUT HOW THEY MACHINE PARTS!! We dont want any of the knowledge these people have gained from decades of on the job experience. We only want TOCNC knowledge bc nobody on this planet knows better than TOCNC. So please stop giving us different ways to tackle a machining problem! 🙄🙄🙄🤦‍♂ And fyi...if it went over your head...This is a condescending sarcastic comment. Just bc youre not intelligent enough to realize that its always worth listening to an experienced machinist who's offering his knowledge.....please just stfu because I (as well as most others her) appreciate when others offer different techniques.

@JS-cs8gz 11 ай бұрын

Good video Travis! I haven't ran a CNC lathe for many, many years. But this video walks you through what can take months and maybe years of learning how to apply the right holder, the right insert, the right feed, the right spindle speed to achieve the correct surface finish in about 15 minutes. It is a must watch for all newbies. Learn something new and save the time and the headache of learning the hard way.

@jbrownson 11 ай бұрын

Great video, it’s so useful to see the actual results of doing things different ways rather than just being given a rule of thumb

@darrenersmit824 11 ай бұрын

There is only one way,...the right way

@lcjjr.6714 11 ай бұрын

With a steel bar anything over a 4 to 1 ratio will chatter as a general rule. I’ve gone up to 12 to 1 with a solid carbide bar or even higher with a Sandvik Devibrator boring bar. Great video. Thanks for all your hard work and expertise!

@idudodomu 11 ай бұрын

11 to 1 i was running personally, VBMT cermet insert, 0.1mm above center line, steel bar.

@Dyna78 10 ай бұрын

Shhhhh! I have a feeling they're keeping silent about those tools (pun intended) since they work so much better than even carbide. Certainly in another category entirely when it come to price as well though. :/

@bosanaz2010 9 ай бұрын

@@Dyna78 are there even oil filled bars in like 6mm or 10? or closer? Same for the spring ones

@Dyna78 9 ай бұрын

@@bosanaz2010 I have seen oil dampened 'silent' tools as small as 10mm shank diameter, but not sure if anyone makes any smaller than that. For anything smaller than that, I would probably use a solid carbide bar from Circle Tools or Micro 100.

@deags7 11 ай бұрын

Call me old school but I was taught that the cut should be bigger than your radius, this stops the vibration. Would you believe it the smaller insert worked better but I bet if the larger rad insert was given a bigger cut it would also work fine

@blueroot2547 10 ай бұрын

Spot on :)

@sillypartners8585 5 ай бұрын

What that mean by cut, Is it Depth of cut ?

@Sara-TOC 11 ай бұрын

Chatter, one of the most common nuisances in the machine shop. Great video, Travis!

@TAH1712 11 ай бұрын

Why can't they wait for the tea breaks!

@markdavis304 11 ай бұрын

Solid advice Travis. You can tell a lot of time was involved making this super informative. Great work editors!👏

@tuttebelleke Ай бұрын

An old colleague who freaked about vibrations on the late, solved about all of them with rubber and sand. He had a whole box full of rubber parts of all kind, seals, inner tires, O-rings,.... He fixed them over or inside the part to be machined, added sometimes some more, until he eliminated the vibrations. He had also a set of selfmade cutting tools that he turned hollow at the end and filled with sand or oil and sand.

@lvxleather 6 ай бұрын

The new generation of machinists are really lucky to have so much knowledge available. It was like pulling teeth to get old machinists to show you tricks back in the day.

@willhutton1516 11 ай бұрын

I learned this the hard way. Was getting a lot of chatter in my parts, so I switched the feed to .005 ipr and .035 D.O.C. For a .0086 radius carbide cutter. Immediately I got a 23.56 RA. On the hard parts, I use ceramic inserts with a .016 radius. .005 D.O.C and .005 ipr. Got a 15.8 R.A.

@Soundpost-f2l Ай бұрын

That's almost the entire tool. Would reduce chatter for sure but on something that small I'd be afraid so much engagement would just shatter it off. (Wait you mean lathe tool, nevermind. I thought you meant like an endmill)

@LandonN9 11 ай бұрын

Thank you guys for this video. Seeing this testing/process using fixed and changing variables to teach us how to solve a problem was super helpful. PLEASE do more videos like this!

@trevorgoforth8963 11 ай бұрын

Why do I feel like this video was intended to be an internal training video for Barry and some how got leaked on KZbin 😂

@barrysetzer 11 ай бұрын

Whatever Trevor!

@trevorgoforth8963 11 ай бұрын

@@barrysetzer 😂 there definitely wasn’t any chatter on that grill though 💪🏼

@hamzanawaz7945 11 ай бұрын

haha

@klasjanzen1165 11 ай бұрын

So if it wasn't for Bary we would not have seen this great video 😅 Big thanks to Bary jaja.

@traitretrudeau2367 11 ай бұрын

Why dont you guys hire a lathe operator who knows what hes doing instead of making some trial and error video?

@genesisprecisionllc4331 11 ай бұрын

Thank you for this test! Such good information! When you are in deep in a job and run into these issues, it's one of those things you wish yourself you slowed down and took the time to run a test like this. It takes a huge amount of resources to run test like this. Much appreciated Travis! Great job!

@bekcnc5275 11 ай бұрын

The comparison between the carbide shank and a dampened shank would be very cool.

@travisjarrett2355 11 ай бұрын

Might be a future video my friend. Thanks for the suggestion!

@justin_704 11 ай бұрын

@@travisjarrett2355unfortunately not everyone can afford solid carbide shank tooling. How much was that boring bar? Easily several hundred am I correct?

@mehmettemel8725 11 ай бұрын

@@justin_704 If you're not a hobbyist and have a business you need it you buy it, simple as that.

@geekswithfeet9137 11 ай бұрын

@@travisjarrett2355 I'm by no means an expert machinist, but i have had to use some clapped out gear before and i experimented with lead tape from a golf shop before, and bitumen car body dampening foil.... it's actually quite amazing what a bit of dampening can do. Hell... not recommended, especially on a cnc, but just pinching the bar with fingers is an enormous difference

@traitretrudeau2367 11 ай бұрын

@@travisjarrett2355 u aint helping yourself using a 80 degres insert, go for 35 or 55 so you minimize the contact between the insert and the bar

@kalebfrog 11 ай бұрын

CNC lathe guy here. I use a method “tuning the boring bar” by adjusting the screws in the holder (front screws loose, back screws tight). I always use full slot holders so my set screws engage with the bar directly. I also usually try to run a finish pass of about .007”. My chatter problems have been heavily mitigated.

@CactusforceX 11 ай бұрын

thats interesting, being a manual lathe monkey I always tighten the toolpost screws gutten tight to increase rigitity anywhere I can - that and slow the speed and sometimes rest a nylon mallet on the bar or the work xD..

@shawnhuk 11 ай бұрын

I do both - cnc and manual lathe. One hard lesson I’ve had to learn is many of the tricks and ideas aren’t transferable. Things that always worked on my manual machines don’t work in the cnc machine and vice versa. I do a lot of aerospace bushings and it’s *always* deep bores in long thin parts. Chatter is a nightmare…. I still don’t know enough. And the good tools are eye wateringly expensive.

@Youtubehandlesaresilly 11 ай бұрын

It’s also a resonance issue - you’re basically de-tuning a tuning fork so it sounds ‘dead’.

@adamhayes2528 11 ай бұрын

Incredible attention to detail in this video. Awesome video Travis and great job Tyler!

@TJ-wg3ud 11 ай бұрын

Okuma variable spindle (M694/M695) works awesome for getting rid of chatter. I still do everything I can with tooling/ programming but I haven’t had to duct tape a strap clamp to a boring bar since I started using variable spindle 😂.

@ehinders2000 11 ай бұрын

It would also help to turn the OD after finishing the bore so the material is more rigid

@senorimotor 11 ай бұрын

This is an excellent video! Going to use it for training. Thank you Titans of CNC Machining!!!

@tomrobert2813 10 ай бұрын

Machining in all my years for the best Ra in boring finishes was to use a burnishing tool. You can get a 2Ra once burnished just leave the bore .0005 to .001 undersize. then burnish it.

@intheheatoflisbon5311 11 ай бұрын

Been a machinist for nearly 15 years would have started the same place you said you would with the carbide bar with the .4mm tip but watched the full video great video nice to actually see the differences side by side

@intheheatoflisbon5311 11 ай бұрын

And if in doubt rapidly changing the spindle speed up and down can help to reduce chatter with roughing lol

@Dyna78 10 ай бұрын

@@intheheatoflisbon5311 I've had great results with this technique. Unfortunately, a lot of older Mori Seiki lathes would not allow any manual spindle speed changes once running the program (maybe a parameter setting?), which was crippling to getting good results. I figure it's only a matter of time before some machine control manufacturer designs it into their system to have a sensor detect chatter and automatically vary spindle speed randomly to eliminate chatter. Cheap and easy if it's built in, and would work wonders for threading too.

@intheheatoflisbon5311 10 ай бұрын

@@Dyna78 I prefer doosans to moris for that reason been using ez guide recently but still prefer the "old school" g76 for threading stuck in my ways you could go long hand and fire in some speed changes although it would be a long programme

@haavard1989 11 ай бұрын

I remember we had boring bars that were dampened and also some that was a split combo dampened and heavy metal. But else, every lathe was equipped with Sandvik Capto holders and dampened boring bars. It's another world in comparison to the old shop I was at

@georgeinthejungle6095 11 ай бұрын

for best results i always go (if possible ) to VNMG inserts that 35 deg and .008 C/R works like a charm

@adammiller4879 11 ай бұрын

Great video on chatter being a lathe machinist first chatter was my mortal enemy, and like you said. There is infinite variables in what causes chatter! And would take so much more time to cover it all, when in doubt, keep it short and stout!

@johndonlan5956 16 күн бұрын

Excellent lesson! Boring bar chatter has always been a nightmare for everybody.

@michaelbrukley1311 11 ай бұрын

I work at a pump repair shop and I have to make stainless pump sleeves from time to time. We don't have a wide array of tooling nor easy access to exotic cutters. The best way I have found to reduce chatter is the good old threading bar.

@boblawson1006 6 ай бұрын

"We don't have a wide array of tooling nor easy access to exotic cutters..." sounds like much of my working life making the best of whatever a manager or director had been assured (by a salesman) was perfect for our work...

@adammiller4879 11 ай бұрын

Something to also take into consideration with insert geometry and chatter, a rule of thumb, you must go as deep as the radius of your insert in order to reduce chatter, 👍

@JMill0420 11 ай бұрын

Great knowledge sharing! Love it. I had to beat my head against the wall for years to learn how to combat it. One thing that helps the most is rubber bands and or sound deadening mat like dynamat.

@albertaoridge 11 ай бұрын

Just for the noise sound? Or for a better finish?

@JMill0420 11 ай бұрын

@@albertaoridge Both. It absorbs vibrations and helps eliminate resonance. Chatter isn't just vibration while cutting. It is actually caused but a resonance frequency in the material and tool. That is why common strategies are to change tool length (unsupported from the holder) or to fluctuate rpms in the spindle. There is actually a tool you can get that will test for the frequencies that cause resonance. Then you can find the optimal speed and feed for the tool based on that data. Happy chip making friend. 😊

@GeneralChangFromDanang 11 ай бұрын

A guy I work with told me they would fill thin wall tubes with coolant and put a bung on both ends for chatter free OD turning. I'm definitely keeping that one in mind.

@OpticMoos 4 ай бұрын

@@JMill0420🤯

@philipstevens7727 3 ай бұрын

The whole video is to make all the people here in comments look stupid. Would’ve been a descent comparison if all the parameters were the same like how you said the “feed rate will be locked in place” and then changed it. After the first piece you changed the macro, went from 750 sfm and cut it in half to 375 sfm, then stepped down the depth of cut from .030 to .020, then changed the feed from .004 to .0024 and all descending in that same order from a steel bar with a large radius to carbide with the smallest radius. A real test by a real machinist with real world costs who wants to help a novice get better at his craft and not try to push product would be to leave everything EXACTLY the same and run with it with a vibration meter on the base, that’ll actually show you something. Bet me that I can’t do better than your best ra with a steel bar and the middle insert on the same machine if ra is what your going for and you’ll loose and you know it, that’s sad and no way to pass along any kind of knowledge to “ease the pain….” of chatter. I wanted to see the test to compare the differences but there was no comparison. Instead heard a slow way of saying if you turn everything way down and have a sharper bit with a stiffer bar things will improve, could do that with one bar and insert and changed parameters like you did to reduce chatter for improved ra. ***Dont be mislead, watch some other videos, don’t buy expensive tooling you don’t need in place of knowledge or knowledge that’s shadowed for their gain***

@growsitwell 10 ай бұрын

A part like the one you are showing. I would finish from back to front so chip is not bothering the tool. Would use a steeper side angle insert. Since the tool you are using could not finish from back to front.

@RinksRides 11 ай бұрын

Awesome video! Can't express how valuable this test was to a home machinist. Thank you Titans!

@danielelenarduzzi9888 11 ай бұрын

Great video. I would have liked to see you adjust the parameters to try and maximize the surface finish on the steel and heavy metal

@DimitarMaherov 11 ай бұрын

Perhaps one of the most useful videos of the last year and a half!👍

@travisjarrett2355 11 ай бұрын

Thank you! Appreciate that!

@donniehinske 11 ай бұрын

This video came out amazing! Good work Travis and the editing team! You can tell a lot of time went into this

@thedroolfool 11 ай бұрын

It was definitely a full house effort.

@JMill0420 11 ай бұрын

Nothing worse than when a machinist spends a lot of time on getting rid of chatter 😜 2 out 9 good parts isn't ideal either. Some days be like that though. 😄

@heronguarezi6501 9 ай бұрын

Spindle speed variation helps me a lot on some jobs. It is impressive how just a little of variation can completely remove chatter

@Luspe94 11 ай бұрын

Just a couple of weeks ago, I had a small job where I had to do very similar parts as you used in your video. It was so frustrating since we didn't have the right (or best) tools for the job, and ordering new ones wasn't an option. The only thing that worked for me was reducing the speed by half and almost tripling the feed rate. Damn, that was scary at first since my spindle chuck could only grab about ⅙ of the part's length. Even though the whole job was really frustrating, never ever had I learned so much about inside turning and the capability of my tools and machines.

@drafty0183 11 ай бұрын

Scary to step out of the comfort zone huh?

@Luspe94 11 ай бұрын

@@drafty0183 seeing boring bars bend when entering the material sure is out of my confort zone 🤣

@nicolespittler9530 11 ай бұрын

Great information! Excellent video as always, Travis!

@MrJzplastic 11 ай бұрын

Great experiment and explanation! I would like to see the milling version of this experiment please

@Soundslikeden 8 ай бұрын

⁠I did.. was simply trying to sum up and say they gave a good STARTING point which is beneficial to making matching accessible to everyone.

@gardenofraw 11 ай бұрын

Wow! Thank you Travis! This video was great and will help me on me on my machinist journey! You're the best!

@Midwesternlifestyle 11 ай бұрын

my shop won't buy anything smaller than 1/32" R inserts. my supervisor doesn't want to be bothered with improvements to the shop or ordering stuff so even what we do carry runs out a lot and we still get told to get parts done somehow. which is why i'm leaving manufacturing and going into IT. hopefully i can make enough money to put a CNC in my garage and start a little shop doing custom gun stuff and R&D for my own pet projects.

@theodoreshasta7846 11 ай бұрын

This was a lot of work on your part. Thank you for making the effort as the various approaches and the results are very informative.

@ml3842 11 ай бұрын

The shop cop is teaching us to make great quality parts. Thank you sir.

@monkeymojo073 11 ай бұрын

I believe depth of cut matters on a finish pass depending on tool nose radius. That's why a .008 tool nose radius will have lass chatter than a .031 on a .03 depth of cut. Give it a .06 depth of cut and the .031 tool wont chatter as much.

@paulmiles483 2 ай бұрын

So many ways. Even the high pressure coolant before you start your cut can contribute..one of my favorite remedies is a piece of weather stripping on the inside neck of the bar. It is durable, doesnt get in the way, and absorbs a good amount of the chatter.. rubber bands work good too.

@andrden6440 11 ай бұрын

That was very useful. Thank you. Nice and compact explanation in one source

@hibahprice6887 11 ай бұрын

Vibrations can stop if more metal is removed; the cutter simply bends to a certain distance in which its rigidity increases

@hibahprice6887 11 ай бұрын

Plus a huge overhang of both the tool and the tool holder. On conventional lathes, the cutter is attached rigidly, practically does not hang in the air, and even a steel cutter works great there

@hibahprice6887 11 ай бұрын

Plus a huge overhang of both the tool and the tool holder. On conventional lathes, the cutter is attached rigidly, practically does not hang in the air, and even a steel cutter works great there

@jerelsantos569 11 ай бұрын

That learning is so awesome!! Thank You Titans of CNC.I would like to learn more from you,guys!😊

@CoastPrecision 11 ай бұрын

I notice you aren't using clamshell sleeves. We've found switching to those has provided a stiffer tooling setup and we were able to prove that via tap testing the tool to show the stability curves. Does Kennametal not offer bars and sleeves like this?

@travisjarrett2355 11 ай бұрын

We've used them before and you are right, they are definitely helpful. We did not want to introduce too many variables for one video though. Thanks for mentioning those.

@StarcraftNemesis Ай бұрын

what i can give u as advice as 15 years of cnc machining, is ur workholding and your fixture from tools has to be perfect strong and valid. the second thing is what i can give u advice is take the shortest tools u have. my third tip is for inside tools is. if u use a boaring bar to turn a hole be sure dat shaft is atleast 2/3 of the diameter of the hole. if u hole is 21mm ur boaring bar should be atleast 14mm, whith this setting u can turn with boaring bar atleast 3 times the diameter of it so if it is 14 mm u can turn atleast 42mm setting the boaring bar 45 mm out (safety space 3 mm) with this u have the space for the chips to get out and have maximal rigidity. my third tip would be take the smallest radius of each tool u can. my third tip would be reduce the RPM of the spindle

@lrcustomsinc3131 9 ай бұрын

I have had some chatter on some parts that didn't require a fine finish. It was those time I wish I could replicate those patterns the chatter kicked out.. looked awesome

@CesarGarcia-iv9nj 6 ай бұрын

Hello , great video, many experince years in just 15 minutes, I recomend also oil thru this case is also a good test because holee is to long. Excellent.

@Ovrclck350 11 ай бұрын

I’d have been interested to see how an increase in DOC would have helped the .031R. I do Swiss machining and programming and use positive profile inserts and have to adjust the radius dependent on DOC to get past that nose radius since that profile will establish a V that stabilizes the cut. With a .030DOC the insert was pushing away. Based on the lead angle that appears to be present in this video on those bars, similarly to our setup, the .008R self-stabilized.

@brandontscheschlog 11 ай бұрын

What are possible profile inserts? Did you mean positive..?

@Ovrclck350 11 ай бұрын

@@brandontscheschlogyeah autocorrect got me on that one. Oops!

@richhuntsd12 11 ай бұрын

Well done video. I have found that I just bite the bullet and almost always purchase the carbide bars. I have also found that the .008 NR inserts are great but you better have the grade and chip breaker selection right or your always turning inserts. Great job Trevor. Udaman!!!!

@a.h.1647 9 ай бұрын

The most valuable video I've ever seen in Ytube! Thumbs up!

@ЕвгенийД-х3у Ай бұрын

For a steel holder, the overhang is used up to 3D. For carbide up to 6D. For larger borings used is anti-vibration bar. And of course the depth for the finish pass 0.7mm (0.03inch depth of cut) is very large.

@chandradharkoneti 11 ай бұрын

Excellent video. Thank you for posting this. Very informative. Feels like a 'project farm' video for machinists.

@jungbrain5989 9 ай бұрын

Thank you for the good video. Thanks to you, I got a lot of help 😍

@LS1Cobra 11 ай бұрын

Thanks for this video. I've been battling with some 304 stainless lately.

@Birb_of_Judge 11 ай бұрын

My go do is always lower speed, then higher feed. And or a sharper tool I think i should add thats on a manual lathe

@jacobywurtz 11 ай бұрын

Awesome video guys!! 👍 now let’s see one about the do’s and don’t on milling chatter

@TITANSofCNC 11 ай бұрын

We actually did one and it’s on our channel

@shawnhuk 11 ай бұрын

So, the moral of the story - start with the most expensive tool imaginable - a solid carbide boring bar.

@wadnarancs00 11 ай бұрын

What ismore expensive? A job that you lost because of vibration, or another grinding process, or a more expensive tool?

@danhyde7501 11 ай бұрын

Yeah not sure the point of this resonated with me either. He dropped the second last one on federate after saying In the beginning that we wouldn’t. Feel like could have played with the cutting parameters on the steel boring bar to make that cut better to be honest

@CoastPrecision 11 ай бұрын

He did not use the most expensive tool out there. He didn't go and get the carbide reinforced Vibe damped bar.

@VLChuvak 11 ай бұрын

That carbide bar looks more like fun, not boring :D

@Epiphalactic 11 ай бұрын

buy once cry on... ce you drop it and need a new one. lom

@MichahEmmitt 8 ай бұрын

Watching this video, while machining... knowing you needed the carbide bar and smaller tool nose radius 😂 still watched the whole thing.

@maximiliencorces1784 11 ай бұрын

Awesome Video! Thank you.

@MXstar189 4 ай бұрын

"To all the keyboard warriors out there criticizing those who share their hands-on experience: You need to understand that machining in the real world isn't black and white. Like the video mentioned, there are *MANY* variables when it comes to chatter. It takes time and experience to even recognize what a good cut sounds like, let alone how to achieve it. Sometimes, having different approaches can be exactly what helps you get out of a jam. There's theory, and then there's practice-some of us live in a place called 'reality.'"

@nvertd0966 3 ай бұрын

I have seen some people sticking a magnet on the boring bar to change the resonant frequency, does that actually work well in practice?

@halomaster985 11 ай бұрын

Disappointing video....This is just product placement, and even then there's no mention of dampened bars or other methods of chatter reduction. Sure, there was mention of changing speeds and feeds, but if you're trying to make machining accessible to everyone, why not talk a little more in detail about which direction to go? I guarantee you with the correct speeds and feeds that steel bar would've worked just fine for a 32 finish. Bar diameter, chip buildup, coolant, Y-axis, chuck jaws....All really quick and easy topics to touch on that can also affect chatter.

@tj9382 9 ай бұрын

I disagree. He said at the very start it is a diverse and complex topic and even with three different boring bars and three different tip radii, not to mention speed, rigidity, material type, it stretched into a 15 minute video. As for the product placement, if you wish to avoid that you better move to another planet. Experience and insight are king, but remember, this is not aimed at the experienced machinists. To someone on a learning journey this is invaluable.

@vintageludwig 8 ай бұрын

My dude this whole channel is product integration. Just let it be.

@wallychan 8 ай бұрын

Haters gonna hate....

@Soundslikeden 8 ай бұрын

I have to disagree with you. For one I wouldn’t even waste my time with a steel boring bar when I know from experience the best place to start is carbide. If you watch this vid you can quickly grasp what they were trying to communicate! In my experience you can beat chatter a few ways! One is slowing down the rpms, maybe you can shorten your bar, maybe you can push the part further in the chuck. Maybe using some cutting oil. Point being if you don’t want to put in all of that work to figure it out, this vid serves as a great starting point. That starting point is, radius matters, type of bar construction material matters, the more rigid the better, Best wishes.

@halomaster985 8 ай бұрын

@@Soundslikeden Did you actually read my comment or no?

@owievisie 11 ай бұрын

What helps for me as well when you do a finish pas, to increase the depth of cut

@monkeymojo073 11 ай бұрын

You are exactly right. Especially with a long hang out of boring bar.

@pascalk.5409 11 ай бұрын

we always use big radius for roughing plastic parts on a lathe and the littel one for the rest. the rest is always 0.1mm and in duroplast you get an really nice surface all the time.

@DAONAKHONKHAM 11 ай бұрын

Good video sir. First, I would chose a carbide b/b as big as you can, Stick out as short as you can and indicate the b/b. Second, use .008 Radius. This will do it.

@19Kettle93 11 ай бұрын

Really wish you guys could get Mike Rowe on the podcast, I think he'd be an AMAZING guest. Awesome video as a lathe guy, keep up the amazing work!

@OberegSpb 11 ай бұрын

Классное видео, рад что вы продолжаете просто объяснять сложные вещи.

@victorreppeto7050 11 ай бұрын

Extremely valuable information, Thank you. I wonder what your feed rate was on that Final Cut and you did not say anything about RPM most of the time.

@TJ4A9 11 ай бұрын

Honest question. What is the calculation you guys use to figure out what feed rate you need for the specific tool nose radius to get a desired finish? I have one, and i built the calculator into google sheets and I'm coming up with a 1 radius (.0156) requires .00328 max for a 32 finish. Thanks for any response

@HernandoGMunoz 9 ай бұрын

Excellent video. Well done and good samples. Thank you.

@youtubeisapublisher6407 Ай бұрын

Other common fixes that don't involve switching bars or inserts (if that isn't an option for you, and/or if your shop refuses to buy higher end equipment) Slowing the RPM, run out as little bar length as you can get away with, use as large a diameter bar as will safely fit in the bore you're cutting, raise your feed rate slightly, if you're in an open lathe wrap your part in rubber hose or some other vibration tape ing material and secure it tightly, slap some heavy magnets on the tail end of your bar, use s steady rest. If you're a new machinist hope that helps, if none of the above apply ask the more experienced guys at your shop, each one will give you a different solution, all of them will claim theirs is the only correct one, try them all until one works.

@chauvinemmons 3 ай бұрын

Anytime you have chatter issues especially with large contact area radius form tools run your tool upside down although it would require you to get use the other hand tool to remain on the near side of the bore. Note- Many European manual lathes double rpm if you run them backwards it is to accommodate returning a threading tool to the start position without disengaging the lead screw it's just how they thread also why they don't have a thread chaser dial I found that I actually prefer this method of threading it gives you more control one less lever at the end of a thread to worry about also same from the beginning of the thread you don't have to look for the thread chaser and worry about missing the drop. The reason why inverting you cutting tool works to stop chatter it changes how the cutting forces build up within the carriage causing it to bounce off the bed-ways harmonically to lifting and carrying the entire weight of the cariage

@FNR 11 ай бұрын

I'd love to see this repeated using the carbide bar and the 2 smallest nose radii, but with different DOC, feeds, and speeds to get the highest MRR without chatter. Allow the surface finish to be a little rougher (50? 75?) but go after a high, chatter-free MRR.

@jakubswietlik7137 11 ай бұрын

Very intresting clip, I would try v shape inserts with grounded leading edge, maybe additiinal mass on OD and last if nothig help vibration dumping boring bar