Anything crystalline that isn't a monocrystal will shake itself apart when attempting to cut anything hard using typical feed speeds for standard bits. You would likely be able to go much further with the jade endmill by running it 1/10th as fast.

I love the way you all made a "boring" video about endmill geometry and functionality into something much more entertaining. Well done!

I work with jade. I’ve machined it but never tried to cut with it. It’s pretty strong due to the crystal structure and is 7 on the Mohs hardness scale, so it’s hard. But the sample used here isn’t the best. You need to try with a piece that doesn’t have that multicolored structure. That’s not as solid as you would want. It would work a “little” better with a less pretty sample that’s just pure green. Rounded flute tips would also work much better. I would also recommend a shorter, much stubbier bit.

Don't even care if it works, that thing looks sick! Like a poisonous endmill.

Use an old Nokia as the end mill

Now make one out of a single large quartz crystal.

Please try making one out of carbide. I’ve got a feeling it will work great.

It's all about vibration and tool's resonance frequency , and giving the tool enough time to dampen the vibration, For example glass has very low natural frequency for small stuff between 200-500 Hz Steel has much higher frequency in the KHz range for the same size . Increasing number of flutes decreases overall fluctuation in vibration , but since the flutes are thinner the natural frequency decreases making it more brittle, . For example a glass sheets crack easily a glass cube will not crack easily because it has more girth and more volume to dissipate energy To increase the probability of success using glass or jade feed speed must be ultra slow and maybe make the flute channels narrower to allow for more girth to withstand vibrations also increasing fluting angles will help make forces and vibrations more axially aligned (radial vibrations break tools ) . Tips High helix angles High number of flutes Slow feed rate Narrow channels Maybe bulkier or conical tools

The amount of joy Barry gets from destroying things; warms the cockles of my heart.. even tickles the sub cockles.

very low quality jade, and why cutting from the side and so deep like that? Could at least have given it a fighting chance ..

A future where Kennametal just sells you a CNC program for their endmills

Materials I'd like to see turned into tools. Obsidian, rock, petrified wood (you can petrify by soaking in water for several months) and gems such as Sapphire, Emerald, Topaz, Ruby and Amethyst.

Hardness of the material is important, but not the only important measure. Tensile strength and notch sensitivity are also important. I love your videos and learn a lot.

Hardness doest = durable. Otherwise we'd use diamonds and quartz for a lot more. And before you comment, no diamonds really aren't that rare.

It's crazy how much you know about endmills 😂 Great video, love listening to people who know what they are talking about.

seems like a pretty aggressive cut into that aluminum. looks like it could have made it with less load on the end mill.

Appreciate you running through the CAD at the beginning. A lot of pop engineering channels skip over that stuff, but that's what I'm interested in seeing. Also, Barry is such a card. Love the energy he brings😂

would love to see more optimizations for crystal endmills. I imagine wider, shorter, more flutes, less sharp angles, etc

I love how you guys are asking the serious questions 😂 👍

BRING BACK THE CHEESE TEST 🤣

i would buy this as a dekor for my desk! love it

In case you missed it... They created a 6 flute jade endmil and put a kayland on it with a notch...

If you haven't done it yet you need to make a endmill out of sapphire crystal. Lab produced sapphire is already the perfect shape and being just under diamond in hardness should make it interesting.

That was pretty wild. It's also good that this is now a known tech, there might be some material in the future that requires a jade cutting edge.

Guys, you have to use coolant when you milling alluminium material 🥲Thus, you can extend the life of the cutting edges by preventing sticking chips from being deposited edges of the endmill.

One of the best video ideas I have ever seen, awesome!

"Because it is a natural mineral, it will have a mohs hardness of 6 to 7" Diamond and ruby are natural minerals that are mohs 10 and 9 respectively. A "natural mineral" doesnt have a hard and fast rule like that...

these grinding videos are sick

Try ruby or sapphire next. The man made ones with no flaws. I think they call them a boule. At least they have a hardness close to carbide and a uniform crystal should give it more toughness

I have an idea! 1) Make a hybrid endmill from tungsten carbide or something like inconel 2) cut flute sections from a hard crystal like Mossanite. Or synthetic sapphire. 3) braze flute sections into the metal core, then finish cut the whole mill on the grinder. Tough, shock resilient core with super hard edges…use it any non-ferrous. Material with coolant…it will last!!!

I wonder what “part materials” could cut. For instance, maybe inconel could cut aluminum

Third time is a charm!! You’re getting closer, Chris!!! I can’t wait to see what you come up with next. 😁

That was cool seeing the operations needed. Thanks

What an interestingly cool video!! Nice one Chris and Nate!

Y’all crazy over there! Nice video. Everyone loves Chris 💪🔥

Chris always getting creative with his grinds!

I really was rooting for that little endmill! Keep on going trying materials! Thumbs up!

I carve pounamu, its a type of jade only found here in new zealand. I was actually surprised how well this held up! Great video!

A super fine grit mill driven finishing stone would be interesting for the leftover piece. If a h13 steel core was added for support could actually be a fine tool.

You should grind the od's from shank to end of tool, your wheel will stay sharper longer. Lower your plunge percentage so it doesn't jam into the tool.

This is just a random thought, but if you tried to do conventional milling instead of climb milling. I think it might have survived the aluminum since the force on the tool while climb cutting are a lot higher.

Obviously when making a tool it's not just hardness that counts. There are many other material properties that need to be considered like tensile strength, compressive strength, elastic modulus, etc. These tests on various minerals are pointless, but I guess it's good content for social media.

Just got to do a jade tool and add some diamond dust on the cutting edges. You got this.

NGL these would be neat gifts for machinists!

Nice video .. how did you determine the cutting conditions for a tool not in the market without the research behind it? What was the rpm or fz used in this experiment? for machinist it would have been interesting seen this values on screen .. thank you, it was entertaining seen how you took the time to make the endmill

Does Machinery's Handbook have suggested feeds and speeds for jade endmills?

I’ll see you guys at the Kennametal roadshow! I’m a Kennametal applications engineer, and I’m working the event

I should send you my wife's roast beef. lol

Thanks for showing Walter Grinder programming, I am just starting programming ours for our regrind shop on the same Grinders. We have trouble getting the K land adjusted in correctly. How are you doing the K land? Our process was programmed to K Land with a differ wheel than the gashing wheel, so it makes it hard to adjust them both. I’m am thinking about changing it to rough and finish the path, dedicating a rough gashing wheel and a finish gashing wheel. I think that if the same wheel does the gash and the L land on the point angle edge it will be easier for the team to control. It will just be a matter of wheel wear then. Let me know your thoughts on this.

I think you should have mentioned the Startec tools twice as often... I have no idea what they currently cost but you could get a sapphire alloy phone screen blank that hasn't been sliced up yet and have a go with it. They come in about 3"9"10" but might be veeeery pricey.

this is nice for some labs I imagine, in the case of needing different bits that won't shed particulates that would be reactive in nature of whatever goal they are attempting to achieve. ie. metal shedding from a bit and bonding with processing materials before intended reaction can take place.

I’m curious what the flute rake is vs the k land rake. I work in cutting tool manufacturing and just found your channel, cool stuff!

The amount of knowledge behind this for essentially brand new technology is impressive, there's 3d modelling, obviously some proprietary gcode, feed speeds, material knowledge, simulations (and the tool knowledge about endmills). I hope there's a better title than "machinist" for this job.

Awesome video, Chris !

Would like to see hard minerals optimized. Lab ruby, sapphire. Machine speed, feed rate, depth of cut, twist on the cutting edge. Do a core bit of mineral, fed with grit too.

Excellent Voice, demonstrations, visualization and explanations - You do repeat facts/things over multiple times which makes this video a bit long - I am intrigued by the subject/ thumbnail with this is trimmed a bit it would be perfect - Great video and if you need to do it to make it longer for monetization reasons then no biggy -> u do what you gotta do - Cheers

You make great videos, it would be very interesting if you showed the method used to achieve a very tight tolerance on the first try such as a G6 on an internal diameter of 20mm for example, with a tool which has just been gauged and which It doesn't have any proofreaders yet.

I would love to buy a couple of those Endmills as a conversation piece. They are Beautiful.

That shop is gorgeous!

The outer harmonic forces are a tricky dilemma you have to consider when making bits, that's the majority of why these break. Higher density and less space between the molecules are going to be the money when it comes to any type of drill bit. The jade could be a decant bit, just not by itself as a material, though I've never worked with jade. I'd guess if you could combine it somehow with another material it could be viable on certain aluminum's. Neat venture into jade tooling guys thanks!

Jade, the Nephrite variety, is the same mineral as asbestos. Nephrite, releases asbestos fibers into the air when carved. Inhaling these fibers can lead to asbestosis, lung cancer, and mesothelioma. Jade workers have an increased risk of pulmonary fibrosis, respiratory tract cancers, and digestive-tract cancers. I'm hoping the mineral you used is Jadeite, which has the Mohs hardness level you mentioned. Be safe out there everyone.

The structural integrity of the core is just not there; if it was a composite of something to make the overall blank less frangible, it seems the hardness is there. How about a steel rod with the end bored or splined out with a Jade cylinder inserted/bonded into it then ground; steel structural rigidity, capturing the hardness and geometry of the jade.

Do an endmill of hardened polyester next! I work with polyester in my restoration projects and I'd really love to see how it'd hold up as an endmill. Although I imagine it will behave like quite a brittle material in a high-torque high-speed operation.

Would be cool if you made a CNC-version of an ancient Egyptian tube drill. They used those for hours and days to cut holes into hard rocks like granite. I bet you could cut down the work time a lot, and maybe use your expertise to add some bells and whistles to it too.

If you want to make a habit of cutting jade, just make sure to take all respiratory precautions. The dust from jade is as bad as asbestos, apparently. Great glimpses into your world though! I've just started work delivering alloys to fabrication workshops, so I'm getting curious about this sort of thing.

Man when he said j made me feel like I was watching how to make a joint tutorial 😂

If you slow down the piece going into the drill bit but keep the bit speed up, I bet it will cut n not break also a shorter jade piece n it will work.

You should have done an old school star trek enterprise glamour camera pass of that bit once it was finished 😳 That thing was a work of art 😔 RIP .

i would love to have this piece, it looks so cool and i love the basic pieces of jade that i have. if you see this and are ever thinking of parting with it i would like a shot at it. You atleast have a subscriber from me lol, keep up the content

The most beautiful endmill

Years ago (40+) I was walking through the British Museum of Natural History and there was a big rock in the walk way. I slapped it with the palm of my hand because it was very smooth, it made a nice sound. Turns out it was a huge piece of Jade. Multiple tons piece of Jade.

I wonder- if you could somehow produce synthetic jade without all the inconsistencies, how might that work? Although, I've never heard of synthetic Jade (maybe it exists?). Neat video! How about Sapphire?

jessie wouldnta broke it f'sho. this is definitely machining adjacent entertainment; and i'm here for it.

Geologist here. There are two types of jade. The rarest jade is Jadeite Jade, most of it is from Myanmar. The green variety of jadeite jade is called kosmochlor and it is extremely expensive. However, what you have there is very likely nephrite jade, unless your jade cutting tool was more expensive than the machine you used to break it. Nephrite is known as Pounamu by the Maori people of New Zealand. Nephrite is tougher than jadeite jade, and is twice as tough as glass. It is also tougher than most ceramics.There's large deposits of nephrite in Canada, where most is mined. "In regard to the other mechanical properties of jade, the lower elastic modulus of nephrite is almost certainly a result of its lower density; however, its magnitude is still comparable to commercial ceramics and about twice that of common glass." and "The strengths of the two jades exceed most commercially available ceramics;however, they are not comparable to the ultra-high strength of hot'pressed oxides and nitrides used for cutting tools and turbine vanes." Bradt, R.C., Newnham, R.E. and Biggers, J.V., 1973. The toughness of jade. American Mineralogist: Journal of Earth and Planetary Materials. Collecting Pounamu permitted on only two rivers in south Island New Zealand, the Taramakau and Arahura rivers, and only Maori, the Kaitiaki R nanga of the Ngāi Tahu tribe, are allowed to collect the stone (Guardians of the Ngāi Tahu). The only place where non-Maori can legally collect Pounamu is on the west coast beaches of south island, New Zealand, but the stone is very rare. I was told that some shops in New Zealand sell Canada nephrite jade as Pounamu, due to the scarcity of the native stone. So most nephrite jade these days, outside of New Zealand, is from British Columbia, Canada where huge boulders of nephrite jade can be found. So your nephrite jade is most likely Canadian.

Try with a large ruby. Conundrum is even harder. If your lucky u can still find large dirty 1 piece crystals around natural or make one with a induction setup and aluminum oxide

How much is the raw material for the jade and the price for end if it would be manufactured? It cut delrin they did should how well but if it's cheaper to manufacture then carbide and HSS might ne with it

Would love to see you guys do one out of sapphire, and one out of aluminum oxynitride 👍

Would gem-quality or lab-created stones work better since they have fewer flaws? Something like lab created sapphire rods?

Sweet! Another video to answer a question I never asked. All hail the algorithm.

Hi guys I saw this video and I think I might be able to make this endmill run in my new line of tool holders it would be interesting to try this endmill because the thing that caused the failure is the standard concentricity that you get in an ER collet holder. I think that the failure was due to being off in runout and the harmonics are off because of this. even if this endmill is off by .0002" or more it would probably fail.

you should try making one out of a synthetic ruby laser rod

Try Ruby ranks 9 on the Mohs hardness scale

Imagine archaeologists finding this thing in 3000 years and being absolutely stumped not only how we managed to make a perfectly symmetrical bit but WHY someone made it out of Jade.

Can I have it as a souvenir? That is the sickest end mill ever

*BRUH* the noise the glass drill bit made when it died as it touched the metal made it *1000X FUCKING FUNNIER XD*

Nephrite jade has a fibrous grain structure, contributing to its extreme toughness. I had hopes for the alum cut, but it is still a natural stone material. 😅

It would have been interesting to see if using coolant while machining the aluminum..( like you normally would ).. would have made a difference... you can see the cutter getting clogged up by that sticky metal, which breaks carbide and HSS endmills when you dont use coolant.. so I'm not surprised it broke the Jade as well.

You tried to cut solid piece of metal with a Jade stone endmill it was gonna break but maybe concrete or bricks may just cut fine instead since they are just right in-between the line of solid as steel but softish like wood & plastic. You basically gave a strong enough material like Block of aluminum or any similar metal for the Jade endmill to cut-rub and vibrate like crazy on letting all the vibration from metal cutting to go right through the Jade endmill and crack it through inside out. Maybe if you make another Jade endmill drill a hole in the center of the cylinder through it's length drill it's center out and add a metal pin or long screw through the middle of the Jade endmill to dampen all the vibration going through it and increase it's sheer strength of the overall jade endmill. This method of putting a metal pin or screw through the center of a soft material dealing with high torque or high sheer strength loads also works for 3d Printed FDM & Resin printed parts especially for 3D printed tyre wheels that deal with high torque output of electric motors right into tyres which without a metal pin/screw will just sheer the center of the printed wheel making the whole wheel useless.

I would buy one to put on my desk

You should sell some of them it looks awesome as decorations

Add coolant once you get into harder metals. Yes feed speed needs to come down too, but with how fast the tool heated and aluminum got stuck to it. If you used coolant I bet it would've cut longer.

An interesting material to try would be basalt, it is from my understanding basically a manufactured rock like material that they actually make rebar out of, it's flexible like steel rebar but will not take a permanent bend like steel and has good tensile strength. With it's relative hardness and flexibility it might work on aluminum at least longer than jade and glass.

Interesting to see how you machine that end mill, the tooling I use is similar to that only a much sharper twist, press tools for forging helical gears. I was told they machine them on an EDM machine though. I don’t know what grade of steel it is though tbh. We can’t use carbide because of the heat, 1800F + or -

Looks like a work of art!

I gotta say thanks to Brandon Herrera for introducing y'all. I love the content y'all are putting out

I mean, given that jadeite is already an aluminum compound, and you're putting it against pure aluminum with all the impurities removed, the end result was kind of inevitable. Jade may have much higher hardness than aluminum, but it has none of the internal cohesion that a proper metal, (even one as soft as aluminum,) will have and will fail on toughness instead. This is part of the reason why you put tungsten carbide inserts on a tool as the cutting face only, rather than building the entire tool out of carbide, for example.

The big guy should be the grinding machine. Very abrasive

IT WILL WORK! NICE WORK

Next try Aluminium oxynitride and Sapphire ..if you can find something to grind it with

I don't think it got too much of a fighting chance. For machining aluminum especially with tooling thats not specifically designed to cut aluminum cutting fluid is not optional. I remember jamming the cutoff saw in our shop really bad useing the steel cutting blade on aluminum once. We did it commonly if its only a couple parts but without WD-40? Thing jammed right up.