How carbide inserts are made by Sandvik Coromant
ฝัง
- เผยแพร่เมื่อ 23 ม.ค. 2017
- Carbide inserts are used to machine almost everything made of metal. The insert has to withstand extreme heat and force, so it’s made of some of the hardest material in the world.
We take you to the Sandvik Coromant's world class insert production facility at Gimo, Sweden to witness how an insert is made. See how it's done!
Transcript
Almost everything made of metal is machined with an insert. The insert has to withstand extreme heat and force, so it’s made of some of the hardest material in the world.
A typical insert is made of 80% tungsten carbide and a metal matrix that binds the hard carbide grains together, where cobalt is the most common. It takes more than two days to produce an insert, so it’s a complicated process.
In the material warehouse, row after row of raw material are stacked. The tungsten carbide we use is either recycled, or comes from our own mine in Austria. Cobalt, titanium and all other ingredients come from carefully selected suppliers; each batch meticulously tested in the lab.
Some recipes contain very small amounts of selected ingredients that are added by hand. The main ingredients are then automatically dispensed at the different stops along the weigh line.
In the milling room the ingredients are milled to the required particle size together with ethanol, water and an organic binder. This process takes from eight to 55 hours, depending on the recipe.
The slurry is pumped into a spray drier where hot nitrogen gas is sprayed to evaporate the ethanol and water mixture. When the powder is dry, it consists of spherical granules of identical sizes. A sample is sent to the lab for quality check.
Barrels of 100 kilograms of ready-to-press powder arrive at the pressing machine. The binder added in the milling room is the binder that holds the powder together after pressing. Up to 12 tons of pressure are applied, depending on the type of insert. The binder added in the milling room is what holds the powder together after pressing. The process is completely automated. Each insert is weighed and at certain intervals controlled visually by the operator.
The pressed inserts are very fragile and need to be hardened in a sintering oven. This process takes about 13 hours at a temperature of approximately 1,500 degrees Celsius. The inserts are sintered into an extremely hard cemented-carbide product, almost as hard as diamond. The organic binder is incinerated and the insert shrinks approximately to half its original size. The excess heat is recycled and used to heat the premises in the winter, and cool them down during summer.
The inserts are ground, one by one, in different types of grinding machines to achieve the exact size, geometry and tolerances. As the cemented carbide insert is so hard, a disc with 150 million small industrial diamonds, is used to grind it. The excess carbide is recycled, as well as the oil that is used as cutting fluid.
The majority of inserts are coated, either through chemical vapour deposition (CVD) or physical vapour deposition (PVD). Here, we see a PVD-process.
The inserts are placed in fixtures...
…and put into the oven.
The thin layer of coating makes the insert both harder and tougher. This is also where the insert gets its specific colour.
Although the insert has been inspected at the lab regularly during the whole process, it’s manually examined again before it’s laser marked and packed.
After labelling, the grey boxes are ready to be sent out to manufacturers around the world.
When the inserts are worn out, they are returned to Sandvik Coromant for recycling, and the process of making a new insert begins. - วิทยาศาสตร์และเทคโนโลยี
2 days to make the insert, 2 minutes for me to ruin it
Right , same here
As I machinist I work with sandvik inserts a lot. It would be good to see how they are recycled and presumably turned back into powder.
Hi,
Thanks for your comment! We have noted that there is a lot of interest for a film about the recycling process and have added that to the wish list for future film productions.
greasemonger29 he uses PVD coating in last. can you tell me estimate price od pvd coating machine ?
+GreaseMonger , how do u grind these inserts after they have become dull ?
It's too costly to send carbide back to get recycled instead we use them in hard facing earthmoving gear or as shrapnel in hand grenades.
Sachin Ki You dont. They’re disposable, that’s the whole purpose of using easily replaceable indexed tooling. They dont have enough material to be re-ground, that very small rise of the edge is the cutting surface. The process of shipping, setup, and grinding would be twice the cost of just buying another insert, and because each insert dulled surface would be a different dimension, the grinding process would probably have to be custom for each piece. Not worth it. You re-grind HSS and permanent carbide tooling bits, not disposable inserts. Just dish out $10-$15 for more which will pay for a hundreds of times its worth in work.
Apart from the awesomeness of the process, applause for your marketing team for making such a nice video.
Thank you Marco! We are truly glad that you like the video.
8
Thanks for a fantastic video! I had no idea the shrinkage rate was so high during sintering. Amazing you can determine the final size at all accurately.
Not to undermine the difficulty of getting sintering right, but the final dimensions are determined by the grinding process that occurs after sintering/shrinking.
Anthony Cullison Also not all inserts are grinded into dimensions.
Exactly my thoughts while watching. The shrinkage must be consistent, which is a strange enough concept to digest on its own.
Imagine what injection molding engineers go through🙃🤷♂️
ahh have had variances of .005 in some
And I complain when I pay a tenner for an insert! Unbelievable, makes you realise how good value these things are...
inserts a blessing
Most of the reason you pay that much is because it's made not in China, first world countries put huge markup on everything that involves labor. Chinese tungsten carbide inserts are just as good and cost a fraction of standard tools price.
@@michaelbuckers I wouldn't go as far to say they're "just as good" but they're certainly much better value and worth it for small shops / Home gamers
Yes..i always bought the bulk packs..
Mi 28 oh please lol. They don’t put a premium. They just pay their employees an actual pay, and China gets away with very little import fees on their goods. Try importing something into China.
The investment in and level of automation in the process is very impressive. Carbide dust must play havoc on some of the process equipment, Excellent video.
Kind regards,
Tom
Thank you! We are really glad you like the video.
Wow, fancy seeing you here! :-D
Wooo oxtoolco
for $14 a piece no wonder Made in China are 10 times less and as good as any
aldo6717 if they were as good as any, there would be no market for other companies. You just don't know what you're talking about and that's ok. Are the Chinese ones very good? Yes. But they're lacking the consistency, tolerance accuracy/precision, and most importantly the backend customer support. Good luck calling China. Are you going to notice the difference in your import lathe in your garage? No. It's a company spending $10k/year on carbide going to notice? Yeah, a bit. Also, they're likely a smaller ship where the backend support is priceless. Is a company spending $100k/year on carbide? Better believe it. Especially since they're getting tool life data off their machines where they'll notice a difference.
Amazing video Sandvik. I had no idea they shrunk 50% when they went into the oven. Thanks for giving us a peek into the process.
Thank you Audie! We are really glad you guys like the video and find the information valuable. Don't forget to share it! ;)
Yes, I had always thought they were pressed to near net size, then sharpened after sintering....a couple years ago, here on TH-cam...Titan Gilroy visited a carbide mfg. plant and he was also surprised when they showed how much the material shrinks.
I'd also like to know more about the 2 coating processes. Here in Sacramento, Calif. there's a company that does some stuff like that...Vacuum Process Engineering.....but they don't like showing how it's done....
It's mind blowing ( to me anyway ) that something that shrinks that much can end up so precise.
50% shrinkage is way off. Can’t imagine why they said that. 20% is more in the ballpark. But still, the precision of the process is impressive.
Such a good marketing video, it’s brought back memories for me as I was an apprentice at Coromant.
There is actually alot more than what’s shown in the video. It only outlines the core process.
Before the inserts are sintered you can break them like a biscuit they are so soft.
We want "the MORE"!
It's a wonder we can afford carbide inserts at all.
They aren't cheap.
You can’t afford NOT to utilize carbide.
@ Phil it depends what you call cheap and what your needs are (quality/ performance) I use Inserts on a minilathe :D
because i can run much higher rpm than with HSS.
Its great since the minilathe has less power in the slow RPM range, with carbides i can compensate that by running higher speeds. I got Mitsubishi inserts from ebay pretty cheap. You can get new original Sandvik Inserts on ebay cheap, last time i looked they arent expensive in my opinion (starting at 10-15$ for a 10xpack, Canadian ,US,EU, Isreal Sellers).
Sometime you can get lucky to spot a offer for 6,5-8$ of new in-stock inserts a seller wants to get rid of.(going out of business or switching processes might be a reason for example) EDIT, ok on Amazon they cost 20-300$ Dollar a piece XD , glad that ebay exists
EDIT lol i found even cheaper sellers, 4$ for 10pcs from mitsubishi , i bought 10packs for a lifetime xD
As the video says, carbide can take much more heat and pressure than, say, high speed steel. As a result, you can run your machine faster and take larger cuts which, in turn, means the turn around per piece is much shorter.
So if you're running production you'll be able to cut more pieces per hour. If you're running one offs, you or your employee will finish the project sooner and will be able to move on to the next project.
"Time is money" may be a cliche but it's also a hard fact when you're running a business.
@@phillhuddleston9445 - 2 bucks a piece 20 years ago, for a basic cutting insert.
Fascinating! Glad so much gets recycled, even the heat from the ovens. Nice job.
I've been a machinist for over 10 years now and it's fascinating to me to see the process used to manufacture the inserts I use on a daily basis. Big props to your marketing team for making such a well-laid-out video that explains the whole process.
Excellent video, showing the entire process of R & D and manufacturing behind a simple insert.
the emphasis on recycling throughout the whole process is amazing to see! great job guys 👍
@Heads Mess Maybe too large chunks or of a differing quality?
@Heads Mess i hear you... Weird that they would not accept it then... In the other hand, it seems like you have a really cool job working with stuff like that👌
they mention it a lot, but the process is never shown or explained. nor are any numbers given.
@@oskarthompson3789 strange, it appears as though the comments you were replying to has disappeared.
@@funkyfresh1013 happens when someone deletes their channel i think
This is true high tech. I really love this. Every step is truly thought out and done with so much precision and attention to detail.
Just found this video working on a project for my college machine lab course. As an apprentice it's really impressive to see the process that creates these amazing tools that we use every day. I definitely have a new found reverence for the production of carbide inserts. Very glad to see the nod about recycling as well, too many facilities do not take part and should to make sure the resources we are able to reuse are not wasted.
It is amazing that such a complex product can be marketed as a commodity!
Some insert geometries have very complex grinding angles but outperform their cost during machining. Thank you for this video.
I use sandvik every day and I really enjoyed this video. You true make a great insert!!!
I will never take for granted again, awesome process Sandvik!
Wow, never gave any thought on how these are made. Bravo!
I use Sandvik's diamond tipped Threading inserts for parts that came right after heat treating(hard threading/turning). Works wonders. Can do 2000 parts whereas a regular carbide insert could do 25 parts before the tip breaks. Awesome work Sandvik
Just think of what an advance carbide was over HSS.
Been using carbide inserts for over 20 years and wondered how they made them and how they kept such high tolerances.
What are the tolerances ?
@@harrybriscoe7948 it depends on the insert. Tolerance is the third letter in the insert code. Look up "insert tolerance code", hopefully that points you in the right direction.
Utterly fascinating. I won't look at these inserts so plainly again.
World class manufacturing facility. Kudos!
What I find intriguing is the whole concept of negative rake, where the actual edge doesn't even DO the cutting !! (If I understand correctly 🙄)
Its also amazing how something so brittle can be subjected to so much loading, heat & pressure & hold up... yet if you even tap the edge carelessly you can chip it, especially the positive rake ground super-sharp inserts....
Great vid guys...
😎👍☘
Actually, the sintered carbides are very good at compressive strength.
That's why , zero or slightly negative rake angle.
Shear strength is somewhat less. Hence the edge may chip off at steep positive rake angles.
Downside is , it exerts higher cutting force. So the machine tool must be very rigid. New brand and sturdy machine is needed.
Great documentary, I thought they ware milled and hardened, but the are pressed. Amazing. Really surprised me. Thnx!
I used to work at a place called Parker White Metal. And we had a powdered metal division. I always thought it was cool. But the sold it when they changed hands. If I remember correctly they regretted it as that really took off. And I think there was even parts we used and ended up having to buy them now.
This is fascinating! Thanks for the video, Sandvik.
This makes me want to change my line of profession completely and work with stuff like this. Top quality in everything presented.
The attention to detail is truly impressive. I can only imagine the time that went into fine tuning the designs for these inserts.
Company publicity videos have come a long ways, that was really great. Good job!
I work for Sandvik Mining and Construction for 12 years Sandvik Coromant is our neighbor in our office but I did not know much of their
Product.This video is great for me that is retired with SMC .Better to be late than never.
I love Sandvik Tooling, your tools and insert continue to impress me on my CNC machine.
I have always wanted to know how they are made. Cool!
Thank you so much for that video, a look into such an process is rare. And even better this makes me appreciate Sandvik inserts even more, I have to say after working almost 10 years in the Industry as a CNC-Mill and Lathe operator, those Inserts never let me or my company down and we tried a lot of other brands.
Also the personal touch with people coming and helping finding solutions for extreme cases such as Vanadis 10 or even hardened stuff beyond good and evil, is just amazing!
That litte suitcase your guys bring are just full of litte wonders! Subbed for sure! :D
Thank you! We are truly glad you enjoy the video and our products.
Fascinating ! Thanks for sharing the process !
Great video! Nice and informative and not too flashy or hyper. Good job.
Thank you! Glad you like it.
Holy Moly ! Last year i worked 7 months in a Silicate Carbide pressing fatory for waterpump gaskets.
Compared to your plant, the one i worked at operated at a stone age level.
The working conditions were horrible, after every shift i looked like i spent the whole time in a coalmine.
We also had to do EVERYTHING by hand. Dusting the parts with graphite, stacking them on the sintering shelfs and sometimes even the filling of the pressform (between 4000 and 8000 pieces per shift, the monotony nearly drove me insane) because the little automation they had was broken -.-
Want to hear a good joke? That factory was in germany .... somuch for german quality and engineering.
Damn, after seeing your plant, if anyone would have asked me to trade up my job for a place at your factory i would have accepted without hesitation.
Ironically there probably aren't a whole lot of jobs left in this factory judging by the video.
@@thediyandpianoguy8665 Oh thats where you're wrong kiddo.
@@MaajkTarkir Thanks kiddo
@@thediyandpianoguy8665 I work at this factory and I can tell you that there is plenty of people working there. :-)
Hey Mark - I once worked at a place called Vernitron pressing and sintering 'shapes' that were made into sonar transducers for torpedoes. Same as your experience - very primitive.
Wow!!! I had absolutely no idea!
Always wondered how they were made. I used to machine ferro-tic, heat treated in house, then ground it. Pressing powder is quite a bit different process. Great video. I probably used thousands of those inserts over the years.
User here. Love your HighFeed-Cutters!
Your factory is what we see in manufacturing textbooks, it's symply perfect !
The first time I held a ceramic insert and watched the level of abuse it could handle, I was blown away.
I tried sharpening the teeth on my stump grinder with a regular angle grinder. The disc just evaporated
Carbide inserts are really some impressive and rare things on this world that just really work,and don't screw around,like many of the things they make nowadays. Love'em.
These are the kind of videos that have helped me pursue more in my field as a student!
The filming and production of this video, along with the recycling video was phenomenal. Idk if you have anymore topics for videos, but I would watch a video about anything filmed, edited, produced, narrated etc by you guys.
Thanks a lot Chris C! We'll do our best to keep producing interesting content for you.
Wow you guys did a phenomenal job on this video production. Seriously great work. I'd love to see these production qualities and efforts utilized on other topics!
I never really thought about the process and amount of work that goes into making my inserts. Thoroughly impressed.
Thank you Morgan! Didn't realize you were in to metalworking. Equally impressed.
Very nice video,
Fully automated manufacturing,
But inspection is manually,
Fantastic Sandvick.
Thanks for video.
Thank ou youtube recommended. I didn't know i needed to see this. I had no idea what inserts are and i still have no idea what inserts are.
Good show. Very artistic, and well put togeather.
I have been meaning to look up how the inserts are made, glad i stumbled upon this video.
Cleanest processing plant I’ve seen in years
Definitely a cut above the rest
They are very good.
👍😄✔
I remember my days as machine shop owner, 15 years ago, when we bought used , worn out Sandvic inserts from flea market, then brazed them on MS rods, to turn them into turning tools for our lathes.
They worked like dream.
We ran the lathes under such heavy feed rates, speeds and depth of cut that, the chips would be red hot.
Amazing combination of hardness, toughness and wear resistance.
👍😄
Wow!! I’ll never complain about price again.
This is an excellent "How it's made" video.
And the inserts are well made too!
Thank you Mark! We are glad you like it.
Such efficiency!
I thoroughly enjoyed this, Danke 👍
You are very welcome. 😀
The part I found most amazing was how much the inserts shrink when they are sintered! Never knew that
RickBaconsAdventures. i worked for american national carbibe and the reason they shrink so much in the oven is because of the wax mixed wirh the powder to hold its shape after pressing
I've never used better tools... love Sandvik... thanks much for the inspiring example.
Thank you for stable quality of tools,fromJapanese car parts factory.
Shit. Now im going to cry when I break an insert!
I already do knowing how much they cost
@@TugIronChief lol, you must work a one off shop huh?
@@TugIronChief man I got whooshed 😂 good on ya
@@TugIronChief I work production, I yearn for one off work, that's later though
@@TugIronChief wild, I bet it's easier to pay attention to it vs a less obnoxious machine.
I can't even guess how many of these I've used over the last twenty something years, it's interesting how they are made.
Wow, I am very impressed. Had no idea just how much goes into making one of these carbide cutters.
Amazing how these processes and automation are figured out
Things of beauty.
Amazing.!!!
And I thought it was impressive when I tie my own shoes!
All things related to metalworking earn my like!
Fascinating ... Every day i learn something new even if i don`t work in the industry...
Fantastic ! This is a didatic material mainly to students understand the Cemented Carbide Process
Thank you! We are glad you like the video.
This is a very interesting video. It suggests that these inserts are made in small quantities. But the size of the raw material warehouse tells a different story.
I used to electroplate carbide inserts for drill bits and circular saw blades with cobalt or nickel. Since the deposited metal layer did not adhere to the pieces they had to be annealed in a furnace with a hydrogen gas atmosphere. If that sounds dangerous to you, well you are right. Smaller explosions were a routine experience.
I'm assuming English isn't your native language, since none of what you wrote makes any sense.
@@algirdpatrick5048 were you high when you wrote this lmao? It makes perfect sense.
@@algirdpatrick5048 nothing here is incorrect about his grammar. Stop going on youtube on lsd
There are some amazingly smart engineers out there. This was very cool to watch. Greetings from Arizona.
Not a machinist, but I like other Sandvik products and it's nice to see quality production facilities.
Amazing automation, the entire factory looks as if it could nearly run on its own. Truly fascinating video.
Hi Kent,
Thank you! We are glad you like the video.
Sandvik Coromant why no CVD video?
I'm a CVD operator. The CVD process is way more innovative and interesting.
For near 100 % automation, check out some of the silicon wafer Mfg. stuff here...
But more expensive and advanced.
ooooh how many thousand of these carbide i have used up, inspected and changed over the ages :P
Used to work for KP komponents here in Denmark. Big uses of Sandvik :)
Greetings from a fellow Dane. How do you measure wear of the insert as production progress? In other words, doesn't tolerances change as the insert gets worn down?
This answered a few questions I had. My interest in inserts came through watching Kurtis of CEE, Australia dealing with the repair and manufacture of parts for heavy machinery.
Inserts r the life blood of industry , ur production line automation is outstanding !!! Bloody well done , i love ur excellent presentation , keep going
Thanks for making this video. I've always wondered how those little bastards were made. I knew diamonds are involved but that was about it. And the fact that 1 takes 2 days to make. No wonder they are so expensive. One question, how often do you have to change the diamond cutter?
nice video. I know now why they are so expensive
Some inserts are pricey crazy designs..but the common triangular are ok..we dont do specialized cnc
That was fascinating, used to sell lots of Sandvik and ISCAAR and SOWA products, and ship, this was fascinating, thank you.
I know the process of manufacture, but its the first time I have seen it. Very interesting. I've been using Sandvik inserts for many years, and they have always been far superior in quality, repeatability and life, compared to other brands.
Always felt bad for getting rid of an insert because it had the smallest chip on it, glad to know they're recycled
Thats a weird statement. The ones you use aren't getting recycled unless you're taking it to one of the few places, like this factory, where they can recycle it. It's not like they're doing curbside pickup for carbide inserts.
A brilliant video! Although I have a question why do u use handle labour adding ingridients in the mixture (It was shown on 0:59 second)? I mean if almost all process is automated.
Thank you! We are really glad you like the video. In some of our recipes the amount of material added is so small that it's simply not possible to automate it.
Best regards
Claes Nord
Communication manager, inserts production
The small amounts need to be doled out by hand. There is one process called de charge where we would use a piece of pvc pipe to beat the back side of a coating tray to get the inserts loose. It always made me laugh. We had millions of high tech machines. Brought in new shipments daily of new equipment. Computers came in by the pallets. This job required a foam pad and a piece of pvc pipe. Hilarious
I love watching this video... watched it so many times...
so glad you recycle, thats awesome
Hi, are you somehow related to Sandvik steel used in knives?
Hi Felipe,
Yes, we certainly are. Sandvik Coromant is part of Sandvik Machining Solutions that is one of three business areas within the Sandvik Group. The other two business areas are Sandvik Mining and Rock Technology and Sandvik Materials Technology. Sandvik Knife Steel is a product area under Sandvik Materials Technology.
If you are interested in Sandvik Knife steels you can learn more and also order sample sheets via this link: www.materials.sandvik/en/products/strip-steel/strip-products/knife-steel/sandvik-knife-steels/
Best regards,
Klas Franevik
Sandvik Coromant
Austria has a tungsten mine? That's new to me.
Hi,
Yes. It's called Wolfram Bergbau und Hütten and is a product area within Sandvik. You will find more information and a video about the recycling process here: www.home.sandvik/en/about-us/sustainable-business/our-offerings/use.-reuse-and-recycle/
Nice thank you
goo.gl/maps/fkmEYnChfCE2
I was wondering how inserts were made.
Very informative.
Sandwick coromatic as melhores ferramentas de corte do planeta .
I don't even need it, but already want it.
fintastek sandvik coramant😍😍😍😍😍😍
Wow , brings back memories, i remember my father buying tools from this company , back in the 80s
Sandvik. Still running 💪, i would love to visit the factory one day
Amazing video no words to say.technology has no limits.
Wish I had the machines to actually take advantage of Carbide.
Who taught the operator of the crane to turn the chain and hook upside down?
Chain lift 101: Always use the thickest part of the hook to lift in. I have done the course due to mandatory refresher, multiple times. This was drilled into us from the get go.
Probably nobody if i had to guess.
He's probably new. i know i had to figure out a bunch of things on my own
I learned a lot from this great video. The first carbide I remember using was "Carboloy" by GE in 1956. Carbide blanks were silver soldered on rectangular steel shanks for turning and boring tools. Inserts as we know them now came later, but invention of carbide resulting in "Carboloy" came along in 1928. See GE video th-cam.com/video/Z4p7OVGYZGg/w-d-xo.html .
The silver soldered tips worked well enough, but were terrible things to re-sharpen if you chipped them, especially large chips. I must have ground hundreds of them by hand; silicon carbide, usually green, wheels for the tungsten tip, and aluminium oxide wheels for the steel shank, alternating between both. They were then lapped by hand on a diamond lapping wheel with either kerosene or some green coolant mixed with water. These of course did wonderful things for the skin on your hands, always rough, dirty and not very nice to impress the girls.
My first encounter with throw-away inserts was in the mid sixties, I think they were Coromant, but the method of clamping was by a clamp plate under which chips often became lodged, causing much grief. Being very expensive we made up our own tools by silver soldering used tips onto steel shanks and grinding them. they did not have a hole in the middle
I went into business in the seventies and a Valenite-Modco representative showed me their range of tools. I was impressed by the eccentric screw to clamp them in; no obstructions on top unless you needed the clamp bar for heavy cuts, a method still in use today. I bought a range of turning tools and here I am still using them in 2017.
Things have changed a lot since I was an apprentice.
Robert King: Thanks for sharing your interesting carbide experience with use. Those early blanks were very brittle with no grooves behind the edges, and difficult to silver solder and sharpen. Negative top rake was used to prevent chipping and interrupted cuts would destroy the carbide. High speed machining would be impossible today without modern inserts and engineered coolants.
Did you have any clue back when Kennedy was assassinated that Oswald didn't do it ?
Adrien, No, I had no information at the time except local and national news. l'm certain that Lee Harvey Oswald shot Kennedy, otherwise why flee and hide in a theater? He was almost certainly the final link of a large conspiracy, most likely from Cuba as payback for the failed Bay of Pigs invasion.
Thank you for your reply. To answer your question I believe he ran because he knew what was coming, but he understood it too late to flee farther than he did. I urge you to watch the movie "JFK" by Oliver Stone, it's a beautifully realised movie about Jim Garrisson, an FBI chief who took it upon himself to investigate the assassination and make a case after Bobby Kennedy was also killed (and practically every male in the family as well as women during the following years). This is a serious, extremely well researched movie, and if nothing else a pleasure to watch (seeing people in nice suits, nice cars, polite, respectful talkers, etc...). He was persecuted professionally, and attacked relentlessly by the press and various organs of the government. The movie doesn't push any theories in your face, it only presents all the facts surrounding the event through the fight of Garrison to make his case and present it.
Here is a link to watch it online for free:
putlockers.fm/watch/OvkQRQGQ-jfk.html
(you may have to wait a minute for it to load after you click play).
Today I had seen this live at Kennametal.. Very satisfactory video..
absolutely amazing, always wondered... now I know.
I wonder how they grind the old inserts when they’re recycling them
Hulk smash
Booooom
Just like diamonds, they are very hard. And brittle.
So you can cut in hardened steel with them, and they can be destroyed just by dropping them on a hard floor.
nice video!
how do you recycle the old inserts?
Hi,
On the Sandvik website you can read and watch a video about our recycling process for carbide tools.
www.home.sandvik/en/about-us/sustainable-business/our-offerings/use.-reuse-and-recycle/
Take care,
Klas Franevik
Sandvik Coromant
Sandvik Coromant could post link here.........
i was a machinist at Boeing for 25 years. used a lot of those inserts. i find it interesting to see how they are made.
I've been machining since I was 8 and have always wondered how the inserts were made. Thanks for a great video.
Thanks for watching!
@@sandvikcoromant You are welcome.