This KNOWLEDGE Will Ease Your Pain and Suffering When Attempting to Machine Perfect Parts
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3 ай бұрынGet rid of Chatter in YOUR Parts
How to get rid of chatter in your parts. Travis walks you through how to get rid of chatter and achieve a better surface finish on your CNC machines. The tips and tricks he teaches today are on DN Solution’s TTSYYB Twin Turret Lathe using Kennametal Boring Bars and Inserts. From a 227 Ra to a 22 Ra. We hope this video provides the techniques you need to get rid of chatter in your machine shop.
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#Machining #Machinist #Engineering
@trevorgoforth8963 3 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 KZfaq 😂
@barrysetzer 3 ай бұрын
Whatever Trevor!
@trevorgoforth8963 3 ай бұрын
@@barrysetzer 😂 there definitely wasn’t any chatter on that grill though 💪🏼
@hamzanawaz7945 3 ай бұрын
haha
@klasjanzen1165 3 ай бұрын
So if it wasn't for Bary we would not have seen this great video 😅 Big thanks to Bary jaja.
@traitretrudeau2367 3 ай бұрын
Why dont you guys hire a lathe operator who knows what hes doing instead of making some trial and error video?
@user-eq9ok3sy6o 3 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 3 ай бұрын
Sorry, but is your name Titan of CNC? Didn't think so.
@christopherjones7191 3 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 3 ай бұрын
@@christopherjones7191 Shut your trap, Globalist.
@joesikkspac7904 2 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 2 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.
@Sara-TOC 3 ай бұрын
Chatter, one of the most common nuisances in the machine shop. Great video, Travis!
@TAH1712 3 ай бұрын
Why can't they wait for the tea breaks!
@bekcnc5275 3 ай бұрын
The comparison between the carbide shank and a dampened shank would be very cool.
@travisjarrett2355 3 ай бұрын
Might be a future video my friend. Thanks for the suggestion!
@justin_704 3 ай бұрын
@@travisjarrett2355unfortunately not everyone can afford solid carbide shank tooling. How much was that boring bar? Easily several hundred am I correct?
@mehmettemel8725 3 ай бұрын
@@justin_704 If you're not a hobbyist and have a business you need it you buy it, simple as that.
@geekswithfeet9137 3 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 3 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
@markdavis304 3 ай бұрын
Solid advice Travis. You can tell a lot of time was involved making this super informative. Great work editors!👏
@TJ-wg3ud 3 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 😂.
@LandonN9 3 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!
@willhutton1516 3 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.
@adamhayes2528 3 ай бұрын
Incredible attention to detail in this video. Awesome video Travis and great job Tyler!
@JS-cs8gz 3 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.
@senorimotor 3 ай бұрын
This is an excellent video! Going to use it for training. Thank you Titans of CNC Machining!!!
@jbrownson 3 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 2 ай бұрын
There is only one way,...the right way
@ehinders2000 3 ай бұрын
It would also help to turn the OD after finishing the bore so the material is more rigid
@RinksRides 3 ай бұрын
Awesome video! Can't express how valuable this test was to a home machinist. Thank you Titans!
@nicolespittler9530 3 ай бұрын
Great information! Excellent video as always, Travis!
@haavard1989 3 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
@gardenofraw 3 ай бұрын
Wow! Thank you Travis! This video was great and will help me on me on my machinist journey! You're the best!
@tomrobert2813 2 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.
@genesisprecisionllc4331 3 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!
@michaelbrukley1311 3 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.
@georgeinthejungle6095 3 ай бұрын
for best results i always go (if possible ) to VNMG inserts that 35 deg and .008 C/R works like a charm
@theodoreshasta7846 3 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.
@adammiller4879 3 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, 👍
@jerelsantos569 3 ай бұрын
That learning is so awesome!! Thank You Titans of CNC.I would like to learn more from you,guys!😊
@kalebfrog 3 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 3 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 3 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 3 ай бұрын
It’s also a resonance issue - you’re basically de-tuning a tuning fork so it sounds ‘dead’.
@Midwesternlifestyle 3 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.
@lcjjr.6714 3 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 3 ай бұрын
11 to 1 i was running personally, VBMT cermet insert, 0.1mm above center line, steel bar.
@Dyna78 2 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 Ай бұрын
@@Dyna78 are there even oil filled bars in like 6mm or 10? or closer? Same for the spring ones
@Dyna78 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.
@DimitarMaherov 3 ай бұрын
Perhaps one of the most useful videos of the last year and a half!👍
@travisjarrett2355 3 ай бұрын
Thank you! Appreciate that!
@mitunlakshmanen4668 3 ай бұрын
The shop cop is teaching us to make great quality parts. Thank you sir.
@andrden6440 3 ай бұрын
That was very useful. Thank you. Nice and compact explanation in one source
@danielelenarduzzi9888 3 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
@LS1Cobra 3 ай бұрын
Thanks for this video. I've been battling with some 304 stainless lately.
@dcwicqjf 3 ай бұрын
Thank you for sharing this great experimentation.
@shaniegust1225 3 ай бұрын
Great video Travis!
@intheheatoflisbon5311 3 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 3 ай бұрын
And if in doubt rapidly changing the spindle speed up and down can help to reduce chatter with roughing lol
@Dyna78 2 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 2 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
@adammiller4879 3 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!
@MrJzplastic 3 ай бұрын
Great experiment and explanation! I would like to see the milling version of this experiment please
@shawnhuk 3 ай бұрын
So, the moral of the story - start with the most expensive tool imaginable - a solid carbide boring bar.
@wadnarancs00 3 ай бұрын
What ismore expensive? A job that you lost because of vibration, or another grinding process, or a more expensive tool?
@danhyde7501 3 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 3 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 3 ай бұрын
That carbide bar looks more like fun, not boring :D
@Epiphalactic 3 ай бұрын
buy once cry on... ce you drop it and need a new one. lom
@chandradharkoneti 3 ай бұрын
Excellent video. Thank you for posting this. Very informative. Feels like a 'project farm' video for machinists.
@OberegSpb 3 ай бұрын
Классное видео, рад что вы продолжаете просто объяснять сложные вещи.
@heronguarezi6501 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
@Birb_of_Judge 3 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
@christophervillalpando1815 3 ай бұрын
Great work Travis!
@user-ti4cd4bl9d Ай бұрын
Excellent video. Well done and good samples. Thank you.
@sheepman6291 3 ай бұрын
This video is gold. I saved it away thank you.
@JMill0420 3 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 3 ай бұрын
Just for the noise sound? Or for a better finish?
@JMill0420 3 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. 😊
@GeneralChangOfDanang 3 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.
@richhuntsd12 3 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!!!!
@deags7 3 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 Ай бұрын
Spot on :)
@Enrique_Solano 3 ай бұрын
Great Video Team! More please! Just like this 👌
@lrcustomsinc3131 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
@MichahEmmitt 10 күн бұрын
Watching this video, while machining... knowing you needed the carbide bar and smaller tool nose radius 😂 still watched the whole thing.
@donniehinske 3 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 3 ай бұрын
It was definitely a full house effort.
@JMill0420 3 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. 😄
@nickthelebo 3 ай бұрын
More videos like this plz .. this one was great
@Luspe94 3 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 3 ай бұрын
Scary to step out of the comfort zone huh?
@Luspe94 3 ай бұрын
@@drafty0183 seeing boring bars bend when entering the material sure is out of my confort zone 🤣
@beachboardfan9544 3 ай бұрын
Now this is the kinda vid I sub'd for! 👍
@a.h.1647 Ай бұрын
The most valuable video I've ever seen in Ytube! Thumbs up!
@flyzeyefab 3 ай бұрын
Fantastic content! Thank you!
@kowalskitk4 3 ай бұрын
great example. many thanks!
@nathanbieri7060 3 ай бұрын
Great video!
@cesarisler6234 3 ай бұрын
Great video! Thank you for share it!
@zmscott2507 3 ай бұрын
"Thanks Donny". You guys cracked me up there.
@maximiliencorces1784 3 ай бұрын
Awesome Video! Thank you.
@barrysetzer 3 ай бұрын
LOL I see Beau Nogo made an appearance! It's about time!
@jacobywurtz 3 ай бұрын
Awesome video guys!! 👍 now let’s see one about the do’s and don’t on milling chatter
@TITANSofCNC 3 ай бұрын
We actually did one and it’s on our channel
@kieranheaford9315 3 ай бұрын
Thank you for this information 👍🏻😀
@pascalk.5409 3 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.
@alfredojoelfernandez8188 3 ай бұрын
Thanks a lot for videos like this
@jungbrain5989 Ай бұрын
Thank you for the good video. Thanks to you, I got a lot of help 😍
@seancollins9745 3 ай бұрын
I usually start backing off SFM and turning up feedrate, but with some parts, it's difficult to manage, sometimes a HSS tool helps, because they are sharper. there is a company making HSS indexable inserts, they are awesome for long turning work.
@monkeymojo073 3 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.
@FNR 3 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.
@19Kettle93 3 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!
@jakubswietlik7137 3 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
@evanchapa9251 3 ай бұрын
So interesting! Love the content! A1!
@Petertje94 3 ай бұрын
an M516 A10 V1 would make it a lot easier. do a test video with dssv. really helped me out a lot with those long parts. cool video!
@feedbackzaloop 3 ай бұрын
I need to see the readings on chatter-free surfaces at the chuck, because feed rate and cutter radius leave specific roughness on their own. Then maybe subtract those to isolate the chatter-induced component. Also compare with theoretical chatter-free roughness... And that is how you get from one sheet to the full binder in the beginning of the video
@DAONAKHONKHAM 3 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.
@Fosforitofercho 3 ай бұрын
Amazing quality video
@mikeschulze3720 Ай бұрын
Im more impressed with seeing a mitutoyo surface roughness gage where the batteries actually work. It seems like every one I've ever used needed the power chord plugged in to work.
@RainbowGin 3 ай бұрын
Great video! Plenty of information in a digestible format
@hochay126 Ай бұрын
Thanks for sharing this problems. How about shape of chip in this case?
@barrysetzer 3 ай бұрын
Sounds like Jessie running a mill! Nice video Travis!!!
@ceelos1994m 3 ай бұрын
Hey guy I got a question. I’m running a lathe and mill right now at the same time . I had the saw cutting a big piece of 14 inch stainless and I programmed a machine for another machinist . The run time on the lathe is 45 minutes . On the mill is 2 hours and the saw like 40 minutes I sat down and put my feet up on the table and watched this video and my boss came out and said “MUST BE NICE, I wish i can be tweeting and pushing buttons all day” Should I retaliate and pop his tires? Or watch another video?
@victorreppeto7050 3 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.
@user-to1tb4lo1q 3 ай бұрын
I would like to see you guys remake this, and the variable you change is your work holding to a 6 jaw chuck
@officialluckyturn 3 ай бұрын
Ive never ever had the luxury of having an mx ra of 32😅 thats ultra rough but thanks for the tipps i'll keep them in mind
@kevinbaxter1571 21 күн бұрын
you could almost double size of boring bar. problem over. i get that can't always be done. great info
@hibahprice6887 3 ай бұрын
Vibrations can stop if more metal is removed; the cutter simply bends to a certain distance in which its rigidity increases
@hibahprice6887 3 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 3 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
@ronvonbargen8411 2 ай бұрын
Another thing that sometimes works with boring bars is to tighten the second screw on holder and on the first screw only put enough pressure on it to deaden the string/ stop the harmonics
@randyjohnson3654 3 ай бұрын
rubber bands and solder wire help too
@monkeymojo073 3 ай бұрын
lol. I have actually used many rubber bands. They do help with the harmonics in holder. You are one of the many few who know this trick. Amen to you.👍
@seangold8469 3 ай бұрын
If your doing alot of components you will be changing tips very often as a .008" rad will wear alot quicker, but for small batches it holds up to achieve a good Ra finish
@gj91471 3 ай бұрын
Tape on some rubber around the OD for boring op
@photiqua 3 ай бұрын
great video. 🔥
@funwitharobot 3 ай бұрын
Does DN solutions have a spindle speed variation feature like Haas machines do to break up the harmonics? Had good success with that option in the past.
@DopetheWind 3 ай бұрын
We turn differentially heat treated steel parts with instantaneous transitions between 32 and 60+ HRC. The answer is patience, nothing else works.
@jeffjones3040 Ай бұрын
Sometimes THAT isn't even enough.
@LP93Mongoose 3 ай бұрын
iv also found that not running coolant can sometimes give less chatter but obviously has a greater effect on tool wear.
@syarifhaerudin7355 Ай бұрын
Very useful video, but I need a video about reducing chatter in the grooving process, I'm still having trouble with that
@jones7399 3 ай бұрын
it'd be nice if you guys could also do tips/tricks for non cnc machining
@85CEKR 3 ай бұрын
Interesting video for beginners, One thing to point out though is that playing with parameters like feeds and speeds and ways of holding the boring bar you could probably get the steel bar with the 0.008 rad to work and for sure you would have been able to get the heavy metal bar to work. In this particular case you wouldn't have needed the carbide bar. There's also de vibe-bars that in most cases work better than carbide, but Kennametal's are garbage, probably why they didn't try those.
@riosambunafa8338 11 күн бұрын
Thanks bro..
@TJ4A9 3 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
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