You have just made REX 121 the most sought after cutlery grade steel on the planet. You. Are. Legend.

@jeffreydustin5303

4 жыл бұрын

Legend, mate!

Holy goddamn. That's incredible. Your poor wrists.

@zackslaststand

6 жыл бұрын

Hey Nick. Love your reviews!

@RadDadisRad

3 жыл бұрын

I just read that in your voice.

@yisshem9057

3 жыл бұрын

Nick Shabazz please do not take the name of God in vain.

Wow what a great vid Pete!!!! Thanks so much for the generous plug dude, you're amazing! Respect to you for that mammoth effort! Ok so my journey, it was horrible during the process but oh so satisfying when accomplished! This stuff was unlike any other steel I've sharpened (made M390 feel like soft steel in comparison) and remained virtually unphased to anything I threw at it. This steel is both excellent and soul destroying (to sharpen) at the same time and anyone looking to buy this steel in a knife (please don't) needs to know that they'll require some serious gear & patience to sharpen it. Honestly Rex will laugh at even the most aggressive sharpening. Even after 4+hrs on this guy (and with serious concentration and aggressive sharpening), I was able to get it to adequate sharpness (effortless paper slicing, and Pete says he was able to shave hair at higher angles) but I was by no means feeling as satisfied (from an extreme sharpness perspective) as getting a 15 degree mirror edge on M390 (for example), where the hairs are floating off the edge of the blade! Nevertheless the Rex was sharpened to a satisfactory level and Pete has tested that in an incredible way, what a legend!

@knifesupport9607

6 жыл бұрын

Thanks again Pete for the awesome props and for all you contribute to the knife community, you're seriously one of the best knife related KZreadrs, certainly the best Aussie voice and my fav to listen to, keep up the good work bro!

@nuwrcaan

6 жыл бұрын

knife Support I second this!

@rwstubbz

5 жыл бұрын

Thanks to both of you for this video. Thinking of a rex 121 fixed blade for my bug out bag. In that situation, something to do to keep your mind busy (sharpening), and a wicked sharp edge, can both be a good thing. Can I ask what stones or grits you used and what kind of stropping compounds if any?

@explorerextraordinaire5472

4 жыл бұрын

Sweet! You're the BEST Thank you for helping this gentleman

Wife comes home to counter covered in rope shavings and beer cans all over the floor, while Pete snores from the couch with hand in ice bucket... "oh Pete, playing with that rex knife again are you?"

@convex7456

6 жыл бұрын

rocketboyty dog dinking the beer left over

@rocketboyty

6 жыл бұрын

convex cedric looking guilty about the mess, watching the cat nervously, hoping in vain he leaves some beer for him too. Haha.

Add a wet cloth underneath your cutting board to prevent it from moving (cook's tip)

You know it's serious when the glove comes out.

Black glove hiding your robot hand! Egad. Props for the effort put into this test. I half expected this to just go infinite.

Dude your patience reaches new levels of Zen. Again much respect for your tests. If i may suggest laying a wet (paper-) towel under your cutting board, it will prevent the board from sliding around. Thanks again for your videos, you are an awesome person.

@CedricAda

6 жыл бұрын

thats a good idea! I do that when I whetstone sharpen just didnt occur to me here 😂

@kerryrwac

6 жыл бұрын

No slip shelf liner from the dollar store works too .

You have made the rope makers very happy and wealthy. Much respect on this whole Unleashed to the Max series!

Song was Grand Cross by the Black Mages. Cut test speed was 1200%

@StuartRedman

6 жыл бұрын

Thank you! I try to find the music every time, and this makes it a lot easier haha

@violetadams4428

4 жыл бұрын

Actually it was through fire and flames by DragonForce. I used to play on guitar hero 3.

Your getting warmer Pete, you'll have to try Rex121 or Maxamet at 0.010" behind the edge with a 15dps, no convex with a Diamond/CBN 400 finish, no strop

@CedricAda

6 жыл бұрын

got a KME on the way. Oh the possibilities

YES!!! Congratulations. It’s been a fun journey getting to that 1000+ mark!

Oh big ups by the way. Have an old delica Sabre grind that I haven’t used for a while as never seemed to hold an edge. Changed the edge profile hoooooge improvement. Thank you. Scraped old plumbers glue out of storm water pipe yesterday, no chipping and stayed sharp. Cheers.

You are seriously awesome my friend! Thanks for the hard work brother. Keep up the great videos

It would make such a hilarious video if you put a 12-13 degree edge on an 8crmov and a super steel at a 25 degree edge to see which could cut more rope

This is impressive, cheers for the effort mate

Great job man!!! And damn that's some crazy steel.

You do great videos, brother. If anyone has an issue with how you do them I'd say exactly what you did. Do em yourself or kick rocks. Lol!! Awesome as always. Thanks man.

Great job Pete

I like these videos. Thanks!

And this is why I love my WS Ken Onion with Blade Grinding Attachment...

Great job. I cut about 2650’ of cardboard with 3 Manix 2’s in M4, Cruwear, and S110V and it puts some pain in your hands. I personally use about 8-10 degrees per side with a 15 per side microbevel on most of my EDC knives and it balances cutting ability with durability well. The bevels get wide and don’t look great unless you have a very thin knife, but they just work very well.

Infinity war carbides floating away haha

@rodrigoteresa7944

6 жыл бұрын

EDnaut Mr.Pete... I don't feel so good...

...'my' hand was hurting ! have a great week...

Very impressive! If this steel ever becomes standard on EDC knives, I'll start a knife sharpening business. Cheers!

@knifesupport9607

6 жыл бұрын

Max Power trust me, you don't wanna sharpen these lol!

Great video, i forwarded it to a bunch of my friends. Well my order of super steels i own are Maxamet, 10V, S90V, 204P, ZDP, M4thewin, XHP. I know this got rid of the carbide tear out thing for me. I never really thought it existed. Now i extra dont buy it. Did you do 10V yet you could borrow my K2

Also hope you are using the rope off cuts for mulching the garden.

Great videos mate. At last someone has found a use for sisal ( pronounced size all) rope. How do other knives do ? Such as Puma white hunter, victorinox butchers knives and other familiar knives. I think sisal is hemp, maybe you could sell the shavings to the hippies 🤪

Wow that is great steel.What is Hrc? Can you do it again with CPM 15v?

Thank you Sir! Guinness called, and he wants to meet with you tomorrow. Something about a photograph, and interview. For the World Record books! 🍺🔪👍😎

I am sure it is Jethros expertise (in SPITE of the Ken Onion)A ken onion grinder has no fine angle adjustment and is more like a bull in a china shop; both of you surely brought that 121 to 13 using something else. THX for your hard work and testing . Maybe someday you can give a (non exhaustive) list of med folders that use 121? !! Thx patreons!

ooh, this should be interesting. Let's see if the 13 degrees per side will hold. I suspect it will because of the CPM tech but it'll be interesting to see. I think 13 degrees per side is still a pretty friendly angle.

Wow! You had me thinking it was a fail lol. Unreal. I look forward to v-edge 12° tests and whatnot. You better not get arthritis from all this cutting bro! That thing is Badass. I'm curious to what Maxamet will do with the 12° tormek edge...or did you do that? I can't keep track!

@andrewrusso4373

6 жыл бұрын

Paul Lonardo I was just getting ready to ask about maxamet

@PaulK390S90V

6 жыл бұрын

andrew russo It would be pretty interesting to see. I bet its up there too. Depends I guess if he does the 13° convex again or the 12° v-edge on the tormek. Not sure if he did the 13° edge with his worksharp attachment or if it was his buddies. I guess the low angle convex is another video type he can do now. Crazy results huh? I did my own testing with some of my knives with kme v-edge cutting the same size manilla rope for the steel will modus m390 at 417 cuts and zt0909 s35vn at 410 cuts especially since his had bad steel and horrible results so I was worried it was more than a one off or a batch. Luckily mine were good and I got killer results. And then I did spyderco Tenacious 8cr13mov and got a impressive 120 cuts and could have gone more but wasn't sure what not cutting paper meant exactly since mine could still cut but just not as good as fresh. I also did a s35vn native 5 look-alike I got just for a work knife and was skeptical about it being legit and luckily got 365 cuts. And it was only 38$! Its on amazon under s35vn knives, you will see it. Great work knife. Then I did a few more because I was curious. It was pretty cool since I found out I had good knives and didn't waste my money. I ran out of rope but want to do it again considering i have 140 knives lol. Not sure why I'm telling you all this but whatever I'm sure you can appreciate it

Wow! What a steel! Hand cramper for all those cuts.

I really dig getting too see how all the different steels perform and stand up too repetitive abrasive cutting and how a different sharpening angle makes the steel perform like a total different material.

Great test on the 121. Question, where can I purchase a Rex 121 knife? Even Spyderco doesn't offer Rex 121.

I would love to see maxamet to the max!

please show us how you sharpened that knife

Hey Pete-I think you pretty much demonstrated that the lower degree angles have superior cutting performance. Do you think that the industry should shift to lower degree angles? I know your cuts have been more less in a controlled environment. How do you think these angles would perform with more heavy duty “beatery” tasks? I’m considering getting a cheap Kershaw faultline as a beater and wanted to try out maybe a 12 or 13° angle on it, but I’m wondering if I can expect the same kind of performance from a variety of hard use tasks versus cutting down into a cutting board. I really appreciate the effort you’ve put into these experiments and am just curious about how to put into practice what you’ve discovered. Thanks!

You're a rebel! 👍

Well rope supplies in Australia are gonna be limited for a while.

Impressive! Any chance you could post some pictures on IG or somewhere of the new tips he did? Hard to see how they are in the video

@knifesupport9607

6 жыл бұрын

EDC with Aaron I've got a black and white pic on the Facebook Page which isn't great... Pete also has a close up of the Rex 121 knife on his Patreon :)

What do you do with all the rope scraps?

Holy Moly

I really want to put a KME edge on that Mako and see how long it cuts. I'm betting over 2000.

For how long after was your hand locked in that shape?

What brand is the rope because I want to buy shares in the company. And yes I have washing to fold as well

@garethbaus5471

6 жыл бұрын

sounds like a safe bet

@zztop3137

6 жыл бұрын

shamley

two questions for ya, Pete, what do you do with the leftover rope, and how do you keep count?

@CedricAda

6 жыл бұрын

Brad Leffert i count as I go, every 100 i test the edge (on the cheaper steels I go every 50, or every 25). I’ve got a big bin full of the cuttings. They dont burn very well as a tinder, so I’ll just fill a potato sack with it and give it to ada to sleep on

Shit just got real....... cool vid Pete, bring on the Rex at 12° and toothy!!!! Lol!

Did the sharpening turn you on to the worksharp blade grinder system? Edit: how long time did the ropecutting take?

@CedricAda

6 жыл бұрын

about 26 minutes of nonstop rope cutting, condensed to 1200% speed. I am impressed by the result of the WS for sure

Rex-Meister For the Win :-)))

You’re a beast

My mind is officially blown

@zztop3137

6 жыл бұрын

What mind

Buya!!!!

FUCK YEAH!!!!

You need a sponsorship from the damn rope company

Omg it’s finally happening.

@zztop3137

6 жыл бұрын

no, its not the final time - it will be used again

Jesus H the tap dancing Christ fucking on a hot tin roof on a wheel in the middle Of July! What kind of demonic pact do you have to make it so A) your wrists don’t fall off during these tests B) make you knives so bloody sharp Might need to hit up my friend Selzark the Demon Lord from the ninth circle to get one of those convex edges! Keep up the great work my friend, and good luck getting that knife to dull!

Looks like my next video once I figure out how to make them better is going to be explaining the power of CPM tech :P. This I suspect is the reason why these steels are pulling it off. Recently CPM manufacturing has improved over time by a significant margin. In brief better CPM tech = Smaller Carbides and smaller grains in the steel which is another thing I have to do a video on.

@garethbaus5471

6 жыл бұрын

even low quality steels exhibit significant performance increases from such low angles indicating that cpm tech may not be the only thing that magically allows this blade to last(proper heat treatment, and a good alloy both can alter performance and this blade has advantages in both when compared to many less performance oriented knives)

@zackslaststand

6 жыл бұрын

You misunderstood what I meant when I was referring to the CPM tech explaining this result but that's mostly my fault for being unclear. Traditionally high carbide steels like REX121 would not be expected to perform well at low edge angles because as you shrink the edge angle the carbides in the steel begin to "fall out" at an earlier point causing edge failure. This effect is directly linked to carbide amount and size. Both carbide amounts and sizes are affected by a number of factors including heat treatment and CPM tech. Assuming the same heat treatment was given for the same steel every single time but the way the steel was rolled and formed into the stock that knifemakers use would change the performance characteristics. Improved CPM processes lead to smaller carbide sizes and grain sizes which allows higher carbide steels to perform better at lower angles, however, you can still see the effect of carbide tear-out in this test. "lower quality" steels exhibit 2-3 times better performance than your "super steels" because their composition tends not to be based on high carbide volumes. 14C28N and AEB-L are perfect examples of this, their composition combined with the right heat treatment causes them to form the smallest type of chromium carbide Cr3C2 at a low volume. This small carbide is small enough that it doesn't undergo carbide tear out and it's in a low enough volume that it actually strengthens the steel like the aggregate in cement strengthens cement.

@zackslaststand

6 жыл бұрын

The reason I suggest CPM tech might explain the performance is that really that's the only easily identifiable factor. Given the composition of the steel, it'd be very difficult to perform an optimal heat treatment of the steel for cutlery usage that would result in good fine carbide size and fine grain sizes and the correct hardness without brittleness and carbide distribution and so on. Heat treatments for complex steels can be very difficult to do and change so generally it's better to do the heat treatment that works rather than search for the optimal treatment. I don't know what the heat treat process for this knife was and even if I did I wouldn't really know how it would affect performance. It's possible that the heat treatment is the reason for this unexpectedly high performance at low angles but I find it unlikely because I don't think knifemakers would have had enough time to play around with Rex121 and most knifemakers haven't bothered to work on it because it's not a friendly steel to work with and grind so it's unlikely that the steel is already at its optimal heat treat or even close to it yet.

@garethbaus5471

6 жыл бұрын

I understand the theoretical benefits of CPM type processes, I just wouldn't go so far as to say it is possible to make any determination one way or another as to how CPM tech is altering the outcome of this steel in this test compared to other steels due to the fact that many other variables were changed including alloy composition, heat treatment, and edge geometry in addition to this in previous videos other cpm steels have been compared to REX 121 with it appearing to outperform them indicating that cpm tech is not its only advantage. without testing a blade with the same alloy and blade geometry that has undergone the same heat treat process but was created using more traditional methods it is very difficult to be able to determine with any level of certainty what kind of a difference said processes make. I once read an article on knifesteelnerds which compared test results from 154 cm and cpm 154 finding the difference to be small (yes I am aware that this may not be the case when comparing a more extreme alloy) did you edit your original post? It seems slightly different from how I recall(not that my thoughts/memories are ever coherent when posting in youtube comments late at night)

@zackslaststand

6 жыл бұрын

No, I did not edit my original post and yeah you're right again. I'm not trying to say CPM tech is the only reason for this significant performance. What I'm saying is that CPM tech allows the steel to essentially perform at low angles. Essentially CPM technology enables the steel to perform at a low angle where under normal circumstances it should fail. I can tell you with a 99% degree of certainty that if Rex121 were produced without using the CPM process it would be a far worse performer with different types of carbides and carbide clumping. It might not even be a functional cutlery steel without being produced with CPM technology. I have studied the chemical composition of REX121 a bit more and while of course, I'm not a materials data scientist I can tell you there's a reason that some steels are only produced using CPM technology. As the chemical compositions of steels become more complex it becomes difficult to guarantee that the right carbides will form in a traditional ingot. Chromium can for massive carbide complexes as large as Cr23C6. With CPM technology and smart steel composition, however, these massive chunks of chromium carbides can be avoided. Again at 15+ degrees and especially at a standard 20 degrees per side angle 154CM and cpm154 would perform almost identically with a slightly higher average performance for CPM154, however, CPM154 would be able to take a finer edge angle than 154CM. It would actually be quite an interesting test to take 154CM and lower the edge angle down until it fails and then test the exact same knife in CPM154 and see how low you can go before the edge fails. The other factor to note is steel made with CPM tech is somewhat easier to heat treat because the CPM process essentially replaces thermal cycling in a conventional heat treatment and all the elements in the steel are distributed more evenly so that when someone makes cutlery with it there's a somewhat higher chance of a good heat treat and the individual performance difference between each knife made from one piece of stock of the same steel should be less than a normal ingot process.

Could you maybe do this same thing with s110v

@CedricAda

6 жыл бұрын

Cooper Evans definitely on the cards! have a pm2 here waiting to be taken to the school of low angles

@cooperevans3835

6 жыл бұрын

Cedric & Ada Gear and Outdoors great to hear I love the channel thanks

I expected a sponge Bob "three hours later". This is serious..broke out the o.j. Simpson glove for this one.

Now Maxamet to the max!!!!!

Thats the blade steel you take on a mars mission 😂

carbide tear out can happen if not using diamonds below 10 micron or so.. but who knows if that even matters in cut tests, until its been tested. knife steel nerds says edge angle matters most. knifesteelnerds.com/2018/06/18/maximizing-edge-retention/ but vanadium is harder than the abrasives that come with the ken onion worksharp. most steel will just cut alot more with lower edge angles, the carbide tear out might matter less than edge angle. after all the vanadium is like 1micron in size. i dont think id care, 1300 cuts is alot.

Those ken onion belt sharpeners can’t really be 3000 grit. It leaves my knives very sharp but I feel like it has to be a toothy edge

How difficult is it to sharpen Rex 121?

@CedricAda

6 жыл бұрын

check the pinned comment for the sharpeners experience. I did a video about it if you search Cedricada rex 121

@knifesupport9607

6 жыл бұрын

Short answer: incredibly hard!

Cats and dogs everywhere

Pete; At sometime the knife steel will keep you up for twenty four hours cutting rope .

@garethbaus5471

6 жыл бұрын

some of his tests occur over the course of multiple days

Peter - Peter - Peter - Peter - Peter

duh..(knuckles dragging) can you baton it he ha

You need to try S125V

@convex7456

6 жыл бұрын

R D mother russia 125v bevst steelz evar

@CedricAda

6 жыл бұрын

R D that may hold for as long. Also 15V, if anyone will make something in it I can get

@tacticalcenter8658

6 жыл бұрын

It's hard to find 125 heat treated correctly as it's very difficult. A few Russian guys have done it very good and iirc Phil Wilson too. But can be fairly brittle.

@RD-fb6ei

6 жыл бұрын

Tactical Center true. It is still amazing tho

@oceanwaves83

6 жыл бұрын

HAP72 is another

Do Maxamet! Cuz I have one, and I don't want to screw it up.

1st comment :slaps the inside of his arm like wanting a needle: more cuts........more ...cuts.....jonesing for more cuts........2nd comment .....the next level is there is a sharpening tester device ((a lil expensive)) but its a scale that reads the pressure needed to cut filliment....soo when you do your rope cuts every time you test on papper should cut philiment to get the reading ((and of corse a reading before you start)) then we can kinda record the progression of the edge retention :) just saying be awsome but i think the device is between $150-250 american kzread.info/dash/bejne/ZoaXqNiaosmze7A.html ((this is the device and how it works))

That doesn't look fun at all... But thank you for the hard work

spoiler alert @ 1:39

9/11 wasn’t an inside job, apparently someone had a rex121 blade on each plane.