Reason I'm here. I help open and knock down a container of boxes ever few months. Upgraded to a flat grind and better steel knife and I kept having to check the edge because it was binding up. I thought the better steel was somehow dulling quicker but it was still shave sharp. Only difference was the new blade was a full flat grind. This confirms my experience, hollow grind slices better
@harisyoung4110
3 жыл бұрын
what steel is that your better steel ?
@King88_8
3 жыл бұрын
@@harisyoung4110 original was 8cr. New one is D2
@harisyoung4110
3 жыл бұрын
@@King88_8 What knife is it ? D2 is my favourite steel for a work beater knife, i like it more than s30v.. but not all manufacture know how to heat treat d2 properly, so sometime it became worse than 440.. example is my chinese CH brand d2 is worse and dull fast on my usage compare to my d2 from ganzo.. my ganzo is the tough d2 knife i ever had, it can cut slice the electrical copper wire and still can slice through paper after that.. for budget d2 knife, i only trust those from ganzo and twosun brand.. it got the higher HRC rating for d2 category that lee from "love them knife" channel had lab tested.. checkout his channel on steel and hrc result on all the knife brand before buying other knife from each manufacture.
@King88_8
3 жыл бұрын
@@harisyoung4110 the steel quality is not the issue. The flat grind gets hung up yet is still sharp enough to shave with. I came to this video AFTER my test of hollow Vs flat because I couldn't understand why I had an issue cutting cardboard with a sharp blade. I thought there was an an issue with the knife but as it was practically razor sharp, the only difference was that it was a flat grind as opposed to the hollow I'm used to. If you cut a couple boxes it's not an issue. If you're cutting 30, 40 boxes regularly, you would notice it
@harisyoung4110
3 жыл бұрын
@@King88_8 It simple, in theory hollow will slice better but flat more durable for hard use because its more thick behind the edge.. i still prefer flat grind due to that.. i can reduce the bevel as low to 17degree per side and it can be more slicey than hollow.. with hollow grind if you go below 20 degree because behind the edge is thin, that bevel will look more wider and higher chances to make the rolled edge when cutting hard object.
@howardgreen9718
6 жыл бұрын
G’day I appreciate you putting together these practical demonstrations 👍😃
@listenup455
6 жыл бұрын
It would have been nice to see the initial sharpness of both knives before the cardboard cutting. Thanks for putting in the work to do the testing!
@neroknives1828
6 жыл бұрын
Matt K I’ll remember that for next time. I did on the first time I shot it, but forgot on the second 🙁
@christophdegen3967
6 жыл бұрын
Nice comparison. Good job again.
@artoturunen4816
4 ай бұрын
When feathersticking I have noticed that flat (the one in puukko knivcs with 2ndary bewel) is superior to hollow grind, but with slices the hollow is better. I think it might have something to do with hollow biting more and thus allowing a narrower angle range in which it works well. Puukko in turn can be held in almost any angle and it feathersticks still. Opinions?
@yiipidyreviews2420
4 жыл бұрын
I only have one PM2 and its serrated and I have the Sebenza 31. I like the PM 2 serrated because of the sharpness of the teeth and is very useful. I like the 31 because of the hollow grind. both great knives. but that 31...kind of killed it for me for every other knife because of how amazing it is haha. love your vids.
@convex7456
6 жыл бұрын
When u used the choil the pm2, it did improve a little. But still nowhere near hollow performance
@whocares3986
6 жыл бұрын
On your cardboard cutting you were using the front of the Sebenza and middle back on the Pm2. I don't think it would have made much difference, but did notice. I agree with thin behind the edge is where it's at, but with a full flat grind you can make it as thin as you want. Hard to do with a hollow grind.
@neroknives1828
6 жыл бұрын
I'll keep a better eye on that in future testing.
@rjblank2003
3 жыл бұрын
This isn't talked about enough IMO. With the advances in steels, do we need all these thick grinds?
@chads9179
6 жыл бұрын
Ever tried thinning out the edge on the PM2, and making the edge bevel a lot longer?
@neroknives1828
6 жыл бұрын
Chad S o ya most of my knives are lower then 30 inclusive. I’d say I put allot of my knives around 28 26 inclusive. The pm2 in 52100 is a newer knife of mine.
@neroknives1828
6 жыл бұрын
Chad S that would actually make a good comparison video. Pm2 at 30 inclusive vs at 26. See what extra performance that provides.
@chads9179
6 жыл бұрын
Those are pretty acute angles, have any issues? Or are you comfortable enough repairing the edge that it doesn't matter?
@neroknives1828
6 жыл бұрын
Chad S I’ve never actually had an edge fail on me in the things I cut in my daily life. Most steel can go way way lower then what I even bring it down to. I’ll be making a video on this sometime this week.
@UncleFjester
10 ай бұрын
*Sad day for your generation when people are watching knives cut cardboard*
@Asad-2166
4 жыл бұрын
Have you noticed the way your hands👐 are shaking? 🤔
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