cheers pete. much apreciate the testing sowe can see how it holds up and for those interested to buy this knife and be confidend with it's performance.
I work with M3 high-speed tool steel, if I recall correctly, and my knives will go through FMJ bullets with no ill effects; however, if I hit one staple, it's either the grinder, or trying to get out the nick with a diamond sharpener, if I want to fix it. So how does it actually do against staples? Because I'm kinda in love with it, and tax-return season is coming up...
i think wood's measured in Janka scale. hard to draw a direct comparison to Rockwells. anyways, i appreciate that data point. it looks adequately tough indeed.
Nice test! I'm not sure how it would do with wittling aluminum rods or batoning into the concrete floor like big brown bear did with the Maxamet knife, but I feel a lot better about Rex 121 as an EDC steel, that's for sure.
No experience with 121 but we use t15 at work for punches and dies and it is vastly superior to other tool steels. Based on the specs that crucible has listed this 121 should be similarly tough to hurt and quite long lasting. Given that we use the t15 on stainless i dont think anything short of cutting hard metals is going to challenge this
Hello ! What is it australian red gum? Eucalyptus globulus or any type of australian blackwood (acacia cambagei, omalophylla, etc.) Just for the sake to determine its JANKA hardness. Thank You. Watching your reviews and liking.
We need to make a petition for spyderco to make a knife in this asap. also waiting for them to make a production run of maxamet.. only reason i haven't bought the grey manix is because im waiting for them to release it with liners.
BOOSTEDLASER litterly few people have it. If it's heat treated properly it shouldn't chip. Then again it's probably not something to pry with or chop. How is it over rated? Have you worked with it? Do you think maxamet is over rated? How did yours get so chippy? What angle did you have it at? Did you try a micro bevel
I think the edge stability would only show itself at a more acute angle. Even tho 30 inclusive is kinda the standard in the knife world, I definitely like my knives more acute, and that’s when I think you might run into problems, but most people don’t go that acute, so I don’t even see it being a problem, as long as the heat treat is good. Enjoyed the video
oh yeah, this was more to show that as the knife comes its pretty stout. Probably wouldn't split wood with it but its definitely good for general use, IMO, especially seeing as the kickstarter ones are a little less Rockwell
Cedric & Ada Gear and Outdoors interesting didn’t know about the lower hrc, think I’m waiting for big brown to make the knives in 15v. I think that would give 121 a run for its money, possibly beating it. But that’s just me going off the composition, I truly don’t know.
The Bos heat treated KS Makos seem to be running about 69 HRC. 15V is interesting, I would suspect it would perform between Maxamet and 10V. One of the things there would be what is better for edge retention- Tungsten carbides or Vanadium carbides. Rex 121 has an overall advantage in carbide content volume.
The maker lists REX 121 with stain resistance similar to M4 and O1. His chart is based on a lot of different sources, so I am not sure how that was determined: creelyblades.com/steel-charts/
Even though it has 5% chrome that is getting eaten up by the carbon, there is likely very little free chrome to create a lot of corrosion resistance. When I grind them dipping them in water frequently I can see corrosion develop pretty quickly. I do think it would be a little better than a 1095 or 52000.
I'm always afraid of staples , with any knife . I can't wait to get some of that on a folder . Hey , what's that orange handle over there ? A Steel Will Roamer ? You should do a "dick head survival " with it , I've been waiting for another episode ....
I feel like I'm hearing a little bit of weirdness on the paper cutting but I might be imagining. How is that knife sharpened because edge geometry is the number one factor in edge performance. Steel types are really complementary to the edge geometry that you implement. Rex-121 industrially as I understand it is used in place of carbide cutters when extreme hardness is required but carbide is too fragile. So rex-121's toughness is really measured within that context. Of course heat treat is a big wild card factor as well. I have no clue in the slightest about rex 121's heat treat. Perhaps the maker is running this knife at the minimum hardness of 121 which is still probably something ridiculous like 66 hrc in order to achieve a level of toughness.
That's an excellent all around geometry for knives with this kind of steel. I'd be willing to bet though below 32 ish degree inclusive edges you'll start to run into real issues. I was pretty impressed with the wood cutting test. Also interesting to note I did find a spec sheet for Rex 121 and 68 HRC is the lowest recommended hardness for the steel. Another fascinating point at least for me is that Rex 121 is tempered at 540 C (1000F). That's the same heat one would hard any of the 10XX series simple carbon steels which is kind of amusing to me. Here's the spec sheet for Rex-121 and the most fascinating thing in there if you ask me is that toughness chart. Crucible does put down rex 121 as the least tough tool steel in their lineup.
Not quite as hot as critical for the 10XX steels (1400-1500 f) by getting there for sure. A lot of modern powdered steels have a tempering option (secondary hardening) close to 1000 f.
Hi Pete I was looking through your blade steel result to find Aus 10 and found out you don't have Aus 10 on there. Do you know how much better it is then Aus 8 and what steel is it similar to. Is it better then D2 or what is it better or worse then . Thanks ahead of time if you can answer
Troy's Flooring Solutions aus10 is similar to 440c. However it's slightly different in that it as slightly more Vanadium and less chromium. Should see slightly more edge retention and less corrosion resistance to 440c. Also highly dependent on the heat treatment.
Andy: Personally I don't see the point in most expensive/exotic steels. I find the time spent sharpening relative to work performed is pretty much the same given a decent steel with a good heat treatment. (Then again, I can maintain my knives freehand on a pocket stone and I don't mind touch-ups when I need a blistering sharp edge.) Furthermore, the lower alloy steels tend to take lower edge angles which is more important to me. And finally, what is *far* more important to me is knives that are made from thin blade stock and ground thin behind the edge and it is practically impossible to find production knives which meet this criteria. In my experience these are things that very few other people seem to care at all about so I don't see much point in making videos about it.
rockets4kids. We all have different preferences. If I can't get though a day without sharpening that's a problem. I also prefer to not sharpen or strop every few days. Wife is a first responder and uses her S35VN knife for cutting practically anything on the job. It would be completely unacceptable for this to go dull after a few shifts. I strop it every 1-2 weeks and take a fine stone to it every couple of months. I would prefer that she carry XHP, 20CV or something a little longer lasting. All of these are easy to keep sharp with a hard stone (I prefer glass stones).
Andy: You are doing your wife a huge disservice by using a fine stone and a strop on your wife's knife. A first responder is going to want a very aggressive toothy edge.
Oh man! It's sad that Cedric isn't here anymore! But I can still see him. Good boy!
I find your videos very informative and entertaining. I wish you luck in all your endeavours, and keep up the good work, mate!
cheers pete. much apreciate the testing sowe can see how it holds up and for those interested to buy this knife and be confidend with it's performance.
I'm liking this blade more and more.
I like this steel from what you have shown
Wow, what an impressive blade.
I work with M3 high-speed tool steel, if I recall correctly, and my knives will go through FMJ bullets with no ill effects; however, if I hit one staple, it's either the grinder, or trying to get out the nick with a diamond sharpener, if I want to fix it. So how does it actually do against staples? Because I'm kinda in love with it, and tax-return season is coming up...
I think you should cut through some things on a ceramic plate to see if it does anything to the edge like it would With most steels
Kicking myself for not getting one of these when they were on Kickstarter.
i think wood's measured in Janka scale. hard to draw a direct comparison to Rockwells. anyways, i appreciate that data point. it looks adequately tough indeed.
Cutting thru that wire like butter! Impressive. I wonder if these are still on kick starter..gotta check
Could you do an edge stability test on s110v v S30v? I would be curious to see how they stack up cutting copper wire.
Nice test! I'm not sure how it would do with wittling aluminum rods or batoning into the concrete floor like big brown bear did with the Maxamet knife, but I feel a lot better about Rex 121 as an EDC steel, that's for sure.
Steel Will Roamer R300 in the background eh? I'm excited about this one!
No experience with 121 but we use t15 at work for punches and dies and it is vastly superior to other tool steels. Based on the specs that crucible has listed this 121 should be similarly tough to hurt and quite long lasting. Given that we use the t15 on stainless i dont think anything short of cutting hard metals is going to challenge this
whoa just looked at the specs on that - what a beast! Does anyone make knives in it that you’ve heard about?
To get a fine edge would cbn coumponds work
Hello ! What is it australian red gum? Eucalyptus globulus or any type of australian blackwood (acacia cambagei, omalophylla, etc.) Just for the sake to determine its JANKA hardness. Thank You. Watching your reviews and liking.
Dulo make knives with this steel. Be interesting to see the outcome of one of these!
Very sharp is that a technical term on the scary sharp scale 😬
its definitely not the sharpest thing ever, but still shaves hair and stuff. Its a different kind of edge, thats for sure
We need to make a petition for spyderco to make a knife in this asap. also waiting for them to make a production run of maxamet.. only reason i haven't bought the grey manix is because im waiting for them to release it with liners.
Edward Voss iirc Sal might have some on the shelf. We may see a mule team in Rex 121 in 2018 or 2019. Tho I could be very wrong.
i sure hope no ones sick of rex121. if they are, comment here or forever hold your peace:
Over rated,chippy
BOOSTEDLASER litterly few people have it. If it's heat treated properly it shouldn't chip. Then again it's probably not something to pry with or chop.
How is it over rated? Have you worked with it? Do you think maxamet is over rated? How did yours get so chippy? What angle did you have it at? Did you try a micro bevel
Tactical, likely trolling.
I declare that knife a keeper and I want to know the rockwell hardness of that wood it must be at least 55 lolol
hi Bob cheers
I think the edge stability would only show itself at a more acute angle. Even tho 30 inclusive is kinda the standard in the knife world, I definitely like my knives more acute, and that’s when I think you might run into problems, but most people don’t go that acute, so I don’t even see it being a problem, as long as the heat treat is good. Enjoyed the video
If you happen to have any phone book paper around, give that a shot, it tends to detect smaller anomalies in the edge, not saying there will be.
oh yeah, this was more to show that as the knife comes its pretty stout. Probably wouldn't split wood with it but its definitely good for general use, IMO, especially seeing as the kickstarter ones are a little less Rockwell
Cedric & Ada Gear and Outdoors interesting didn’t know about the lower hrc, think I’m waiting for big brown to make the knives in 15v. I think that would give 121 a run for its money, possibly beating it. But that’s just me going off the composition, I truly don’t know.
yeah the KS are uniformly
treated by Paul Bos at 68hrc. This was a proto done by Peters I think, to 69
(giggity)
The Bos heat treated KS Makos seem to be running about 69 HRC. 15V is interesting, I would suspect it would perform between Maxamet and 10V. One of the things there would be what is better for edge retention- Tungsten carbides or Vanadium carbides. Rex 121 has an overall advantage in carbide content volume.
Is that a steelwill roamer in the back?! Yes pls
Awesome!
Try cutting a full 360 degrees circle out of the paper, that'll tell you if it's sharp
The maker lists REX 121 with stain resistance similar to M4 and O1. His chart is based on a lot of different sources, so I am not sure how that was determined: creelyblades.com/steel-charts/
Even though it has 5% chrome that is getting eaten up by the carbon, there is likely very little free chrome to create a lot of corrosion resistance. When I grind them dipping them in water frequently I can see corrosion develop pretty quickly. I do think it would be a little better than a 1095 or 52000.
I'm fucking sold. I need REX121... Well shit, it's not available on any knife retailer.
I'm always afraid of staples , with any knife . I can't wait to get some of that on a folder . Hey , what's that orange handle over there ? A Steel Will Roamer ? You should do a "dick head survival " with it , I've been waiting for another episode ....
I feel like I'm hearing a little bit of weirdness on the paper cutting but I might be imagining. How is that knife sharpened because edge geometry is the number one factor in edge performance. Steel types are really complementary to the edge geometry that you implement. Rex-121 industrially as I understand it is used in place of carbide cutters when extreme hardness is required but carbide is too fragile. So rex-121's toughness is really measured within that context. Of course heat treat is a big wild card factor as well. I have no clue in the slightest about rex 121's heat treat. Perhaps the maker is running this knife at the minimum hardness of 121 which is still probably something ridiculous like 66 hrc in order to achieve a level of toughness.
so this knife is 69hrc finished with a 600 grit dimond finish with a 17° cutting bevel and no micro
That's an excellent all around geometry for knives with this kind of steel. I'd be willing to bet though below 32 ish degree inclusive edges you'll start to run into real issues. I was pretty impressed with the wood cutting test. Also interesting to note I did find a spec sheet for Rex 121 and 68 HRC is the lowest recommended hardness for the steel. Another fascinating point at least for me is that Rex 121 is tempered at 540 C (1000F). That's the same heat one would hard any of the 10XX series simple carbon steels which is kind of amusing to me. Here's the spec sheet for Rex-121 and the most fascinating thing in there if you ask me is that toughness chart. Crucible does put down rex 121 as the least tough tool steel in their lineup.
www.crucible.com/PDFs/DataSheets2010/ds121v1%202010.pdf
Here is the data sheet if anyone wants to look at it.
awesome resource! Yeah I’f definitely be avoiding stones and bones with this guy, but pleased with it for an edc steel 😁
Not quite as hot as critical for the 10XX steels (1400-1500 f) by getting there for sure. A lot of modern powdered steels have a tempering option (secondary hardening) close to 1000 f.
Not really a toughness test, but I do get that you on the other hand not really want to damage the blade.
Badass!
OH NOO!!don't try to cut that Aussie wood again!!!!
lol @ apologies for making insanely cool videos
Hi Pete I was looking through your blade steel result to find Aus 10 and found out you don't have Aus 10 on there. Do you know how much better it is then Aus 8 and what steel is it similar to. Is it better then D2 or what is it better or worse then . Thanks ahead of time if you can answer
Troy's Flooring Solutions aus10 is similar to 440c. However it's slightly different in that it as slightly more Vanadium and less chromium. Should see slightly more edge retention and less corrosion resistance to 440c. Also highly dependent on the heat treatment.
Now do maxamet!
#hippopotamus
That wood looks like bone.
If you are afraid to test the knife any more than this then this is a knife you shouldn't use outside of your kitchen.
just going gently mate, if that is the case then I want to get there gradually rather than in one catastrophic fail, thats all
rockets4kids, please point us to your channel so we can see your testing process on expensive knives.
Andy: Personally I don't see the point in most expensive/exotic steels. I find the time spent sharpening relative to work performed is pretty much the same given a decent steel with a good heat treatment. (Then again, I can maintain my knives freehand on a pocket stone and I don't mind touch-ups when I need a blistering sharp edge.) Furthermore, the lower alloy steels tend to take lower edge angles which is more important to me. And finally, what is *far* more important to me is knives that are made from thin blade stock and ground thin behind the edge and it is practically impossible to find production knives which meet this criteria. In my experience these are things that very few other people seem to care at all about so I don't see much point in making videos about it.
rockets4kids. We all have different preferences. If I can't get though a day without sharpening that's a problem. I also prefer to not sharpen or strop every few days. Wife is a first responder and uses her S35VN knife for cutting practically anything on the job. It would be completely unacceptable for this to go dull after a few shifts. I strop it every 1-2 weeks and take a fine stone to it every couple of months. I would prefer that she carry XHP, 20CV or something a little longer lasting. All of these are easy to keep sharp with a hard stone (I prefer glass stones).
Andy: You are doing your wife a huge disservice by using a fine stone and a strop on your wife's knife. A first responder is going to want a very aggressive toothy edge.