Thank you! You explained that it all comes down to p = F / A. That explains 95% of how straight-edge and serrated knives function and do what they do. Brilliant.
I just ordered a Microtech Socom Elite and i ordered it in a combo straight/serrated edge. After seeing this I’m glad I did. I’ve never owned a serrated pocket knife before.
Very nicely explained. There could be an additional factor in the effectiveness of the serrated edge, what might be called the "bounce factor". The tips ride up on top of the object being cut but then there's a dip into the depressed portion of the serration and then to ride back up on the next point (next serration) there is a change in the force vector -- not just the point advancing along the axis of the knife blade but now also having to reverse direction and that requires additional force (which according to your formula means more pressure). There is quite a lot of physics involved in serrated edge action as you are showing. It becomes even more complicated when you see various serrated blade designs making you wonder what was the rationale behind that particular design. Some designers (Such as Thomas Veff) do explain why they made their serrated design, but he's unique in that respect. I've never seen other manufacturers explain why they chose their particular serrated blade design. Thank you for this great presentation though.
I bought the serrated edge German army victorinox on your advise and it's awesome. I prefer aerated for a pocket knife. Got the straight edged mora for a field knife and love it
Thank you so much so making this video, please make one about the angle of a knife and it’s purpose. Again perfect 👌 explanation for serrated edge blades.
Fernando, as always thank you for sharing your knoledge. it may come easy or natural to some folks but why not take a few minutes to learn why when i'm cutting my steak i prefer using that knife with all the bumps on it as my kids would say when they were little!
The Vic green soldier converted me to serrations, now I use a spyderco Tenacious fully serrated, a right slasher goes through everything, pretty easy to sharpen with corner edge of a stone. This is a good video to explain to the doubters that serrations are your best EDC option.
I never understood why they don’t put serrated part in the front an the inside of the blade flat. That Knife you showed was the first one I’ve ever seen like that
I have noticed on the water, The guys with a full serrated blade have more problems then those with straight blades, way and the reason is they do not keep then sharp so when cutting a line it rips instead of cut leaving a unusable end if trying to feed through a loop, or fender,among other things, It is true there is more cutting surface, and will act like a saw, but is useless if not sharp. I carry a dual surface blade, both Serrated and Straight. I check and sharpen as needed. It is a life that may need a knife so a sharp one is best. Good video, somethings to think about, thanks.
Those of you who prefer to always carry a plain edge: have you ever attempted to cut a wet rope, large cable-ties, thoroughly butcher a deer (cutting through cartillage, tendons, etc.), cut baling wire (that has gotten wrapped around a cow's leg), or cut your way out of a tall briar patch (where wounded deer always seem to locate themselves)? I've done all of these with my Benchmade Griptilian combo-edge- and it's never failed me yet. And I totally reject the thought that it is more difficult to sharpen. Have you heard of a diamond rod?? I sharpen the plain-edge part of my knives with a Lansky System, hit the serrations with a diamond rod (if needed), and then strop the plain-edge part. It takes me no more than 10-15 minutes per blade.
Oversimplified the physics to a point of missing the point. Also, if you're trying to shove a knife through stuff without a slicing motion, you may need to reconsider that before trying to make a psuedoscience video about how knives work
Oversimplified how? You're denying that he is applying the same force onto a smaller cutting area thus achieving better penetration due to concentrated force?
wow this really was the most useful video I've seen in a very very long time, this is the new standard of informational vid.
When i saw it 6 years ago, I thought the same thing. Now im just like “well, obviously 🙄 “... its been a long way lol
So basically staight edge for whittling serrated edge for steak or flesh. Cool I got it. Simple, Thanks.
Best explanation so far man
Thank you! You explained that it all comes down to p = F / A. That explains 95% of how straight-edge and serrated knives function and do what they do. Brilliant.
Excellent explanation. Well done and thank you for sharing.
I’ve heard that serrations can get caught on clothing and not slice through
Excellent info
I just ordered a Microtech Socom Elite and i ordered it in a combo straight/serrated edge. After seeing this I’m glad I did. I’ve never owned a serrated pocket knife before.
True ...
Good video !
Love your videos and how you explain things!
I was told there would be no math.
Excelente vídeo te felicito, saludos desde Guatemala!
Very nicely explained. There could be an additional factor in the effectiveness of the serrated edge, what might be called the "bounce factor". The tips ride up on top of the object being cut but then there's a dip into the depressed portion of the serration and then to ride back up on the next point (next serration) there is a change in the force vector -- not just the point advancing along the axis of the knife blade but now also having to reverse direction and that requires additional force (which according to your formula means more pressure).
There is quite a lot of physics involved in serrated edge action as you are showing. It becomes even more complicated when you see various serrated blade designs making you wonder what was the rationale behind that particular design. Some designers (Such as Thomas Veff) do explain why they made their serrated design, but he's unique in that respect. I've never seen other manufacturers explain why they chose their particular serrated blade design.
Thank you for this great presentation though.
Absolutely brilliant brother. Thank you so much!
I bought the serrated edge German army victorinox
on your advise and it's awesome. I prefer aerated for a pocket knife. Got the straight edged mora for a field knife and love it
Very useful info. Thanks!
very useful ,,,,,thanks a lot man
awesome, nicely explained!
Very informative video and nice drawings
Thank you so much so making this video, please make one about the angle of a knife and it’s purpose. Again perfect 👌 explanation for serrated edge blades.
Well done! Thank you.
Muy buena precentacion. Gracias!
Fernando, as always thank you for sharing your knoledge. it may come easy or natural to some folks but why not take a few minutes to learn why when i'm cutting my steak i prefer using that knife with all the bumps on it as my kids would say when they were little!
Good stuff Fernando!
The Vic green soldier converted me to serrations, now I use a spyderco Tenacious fully serrated, a right slasher goes through everything, pretty easy to sharpen with corner edge of a stone. This is a good video to explain to the doubters that serrations are your best EDC option.
Good points.
It's well illustrated by Matthew Culbertson UA-cam vid Meat Cut Test
Why dont they make serrated swords then hehe
Facts
Actually, serrated swords must be a bitch to maintain
I never understood why they don’t put serrated part in the front an the inside of the blade flat. That Knife you showed was the first one I’ve ever seen like that
I will buy it.
Saludos sos argentino?
Nice video.
I still prefer straight blades
I was waiting for him to gut his finger with that hook.
I have noticed on the water, The guys with a full serrated blade have more problems then those with straight blades, way and the reason is they do not keep then sharp so when cutting a line it rips instead of cut leaving a unusable end if trying to feed through a loop, or fender,among other things, It is true there is more cutting surface, and will act like a saw, but is useless if not sharp. I carry a dual surface blade, both Serrated and Straight. I check and sharpen as needed. It is a life that may need a knife so a sharp one is best. Good video, somethings to think about, thanks.
Fix your sound please. It's painful to listen to.
Hmm. This explains. I was cut by a scum bag. Uses a sciasors. I think the end of it acted like a hook
Not even nut n' fancy would explain it better.
Tu enfoque ess lo que hacía falta en los videos de la comunidad cuchillera.
Un abrazo loco.
Thanks! Gracias!
Those of you who prefer to always carry a plain edge: have you ever attempted to cut a wet rope, large cable-ties, thoroughly butcher a deer (cutting through cartillage, tendons, etc.), cut baling wire (that has gotten wrapped around a cow's leg), or cut your way out of a tall briar patch (where wounded deer always seem to locate themselves)? I've done all of these with my Benchmade Griptilian combo-edge- and it's never failed me yet. And I totally reject the thought that it is more difficult to sharpen. Have you heard of a diamond rod?? I sharpen the plain-edge part of my knives with a Lansky System, hit the serrations with a diamond rod (if needed), and then strop the plain-edge part. It takes me no more than 10-15 minutes per blade.
which Letterman are you using?
Charge tti
Just ordered a serrated Lil Matriarch!
Oversimplified the physics to a point of missing the point. Also, if you're trying to shove a knife through stuff without a slicing motion, you may need to reconsider that before trying to make a psuedoscience video about how knives work
Oversimplified how? You're denying that he is applying the same force onto a smaller cutting area thus achieving better penetration due to concentrated force?
I agree. It's only that these days people say serrations are complicated to sharpen and pointless. When used for the right job, serrations are great