Axe Sharpening and Edge Geometry: An Introduction

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  • čas přidán 19. 08. 2022
  • Some thoughts on axe edge geometry and sharpening and the physics of chopping

Komentáře • 119

  • @KevinsDisobedience
    @KevinsDisobedience Před rokem +15

    A very thorough introduction, Ben. Glad you put this together for us. I have experimented with larger or wider secondary bevels on thin axes and have found in my wood they cut well and hold up over time better. When I get down under 18 the steel starts to take on damage on most axes, but with a stouter secondary bevel they hold up. And since the main bevel is the most important I’m not sure the size of the secondary bevel matters that much under 18 degrees. But obviously we’d all prefer to use a razor blade if we could. If only trees grew without limbs lol.

  • @MatthewAmsbaugh
    @MatthewAmsbaugh Před rokem +7

    This has to be one of the best explanations I’ve seen. Well made video sir. I’ll be watching this a few times.

  • @TheWtfnonamez
    @TheWtfnonamez Před rokem +8

    I just found your channel.
    I consider myself a bit of an expert, who has done some bushcraft, owns a selection of axes, and knows his stuff.
    A few videos in and I'm starting to worry that I am like one of those tourists who buys an expensive camera and thinks he must automatically be a photographer.
    You are incredibly skilled, VERY good at explaining your craft, and I consider myself humbled. Thank you mate.

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +2

      I think its a natural progression, i thought i was pretty knowledgeable then i started competing with stihl timbersports, the rabbit hole goes deep

    • @TheWtfnonamez
      @TheWtfnonamez Před rokem +2

      @@benscottwoodchopper Thank you mate. Working through all your videos now ... file in hand lol

  • @TheudBaldM
    @TheudBaldM Před rokem +7

    Clearly one of the best videos on the subject, the diagrams are great!! Makes me want to file some axes once again just to be sure of my angles 😁

  • @scottishcottagerenovation

    Great video, you can tell how much work went into this. It was definitely worth it!

  • @Andreas-tw4cm
    @Andreas-tw4cm Před 2 měsíci

    Thank you, best axe channel i have found so far.

  • @jeffreyrubish347
    @jeffreyrubish347 Před rokem +3

    This is a great treatise on axe geometry.

  • @thefellingfella9886
    @thefellingfella9886 Před rokem +3

    Really good video on axe geometry! Especially liked the virtual part!

  • @Fogyt121
    @Fogyt121 Před rokem +4

    For the local woods and the use I put my axes through, an angle between 20 and 25 degrees with no secondary bevel or microbevel seems to work best. I made a few wedgy hatchets and put 23 degree "flat" grinds on them, along with convex cheeks and they never get stuck in anything. They throw a good chip, too.

  • @trevormartin987
    @trevormartin987 Před rokem +1

    This is the only quality video on the internet clearly explaining the subject. Thank you so much 🙏🏽

  • @Codi_Clapper
    @Codi_Clapper Před rokem +5

    Really nice video Ben! I enjoy the videos you’ve been putting out. Not many take the time to explain and put a science to these things. Thanks for the diagrams. Really cool stuff👍

  • @brettbrown9814
    @brettbrown9814 Před rokem +3

    Excellent video with fantastic graphics. Thanks for putting it together.

  • @jeffbopp1710
    @jeffbopp1710 Před rokem +3

    Hi Ben, I've never before commented on any youtube stuff, but I really wanted to say thanks for all the material you've created. I had been scouring the internet trying to learn about ax maintenance and found most of the content really lacking in detail or explanation. I'm actually one of those who purchased a couple of gransfors axes without knowing much, (a small forest and a regular forest ax; I will say they Are beautiful little axes) and after using them, even after some sharpening (albeit only sharpening the bit not grinding the actual cheeks) I found they just lack much punch for the kind of stuff I enjoy. Ended up trying out a muller canada 1000gr with the 700mm handle per your recommendation, and with the help of several of your videos on sharpening and grinding for efficient cutting, I've ground the cheeks down substantially. Can't really tell the exact angle, even with an angle disc thing, but I'd estimate it's down to 15 or 16 degrees. I used the method of grinding down using the eye as a marker, and was maybe a little over-zealous, because when I finished, many hours later, I worried it was too thin. I went ahead and put a more obtuse, 30 degree primary bevel on the very edge and took it out to do some cutting today, in the back of my head thinking I might chip or roll it..... Holy COW!!!! What a difference!!!!!!!! It's SO satisfying getting those deep cuts and pulling out thick chips. I think I might avoid knots with this one, but I found your advice to be spot on. So, thank you. Really appreciate your stuff. And it's cool to see how many other people nerd out on axes too haha. There's something so satisfying, in a kind of primal way about using an ax. They''re such a joy to use!

  • @kurts64
    @kurts64 Před rokem +3

    Awesome effort on this vid mate, really well explained, diagrams spot on too. Well done!👍👍

  • @A_Meek_lake_Dweller
    @A_Meek_lake_Dweller Před rokem +1

    This is the finest presentation on this subject I have seen.
    Great video thank you Ben!

  • @bastionhead
    @bastionhead Před rokem +2

    Fantastic education right here. Thanks, Ben!

  • @TheJesusr1
    @TheJesusr1 Před rokem +1

    This is a very thorough, interesting, simply explained and informative video. I have just ordered a couple of metal files!

  • @kevintheshoerfast
    @kevintheshoerfast Před rokem +1

    Thank you! One of the best informational / instructional videos I've seen.
    As a Blacksmith / bladesmith I'll put this information to work.

  • @chimmy4244
    @chimmy4244 Před rokem +2

    Great information here! I think that about sums it up. Thanks!

  • @flugit
    @flugit Před rokem +2

    Great info Ben. 👍

  • @jeanmartox3570
    @jeanmartox3570 Před 9 měsíci +1

    Vos analyses sont trés pertinentes! Merci pour cela!

  • @lukasking2573
    @lukasking2573 Před rokem +2

    Great informations thanks, again.

  • @OnceUponAnotherTime
    @OnceUponAnotherTime Před 10 měsíci +1

    excellently presented.

  • @kevcollupy
    @kevcollupy Před rokem +2

    Great stuff, thanks

  • @pascalstolz2901
    @pascalstolz2901 Před rokem +1

    I like a very high, full convex on all my edges. Knives too! the basque axe works so well, because of convex grinds.

  • @coltscustoms
    @coltscustoms Před 8 měsíci +1

    Awesome video! Gonna try this on my machetes too. Thanks!

  • @benhewson81
    @benhewson81 Před rokem +1

    Great Vid, been struggling with the correct geometry choice for two different shaped hatchets, a small forest axe and a felling axe i have, few key points in this video that i hadn't considered, especially re the friction difference between the different grinds and axe shapes....also the bounce was giving me some issues. I'll be getting the file and stones out this weekend and correcting some mistkes i've clearly made. Cheers mate.

  • @brianmaldonado3723
    @brianmaldonado3723 Před rokem +2

    I think that was excellent. Ty.

  • @amc31b
    @amc31b Před rokem +2

    Well done explanation. I like convex edges but they have to be done with thinner cheeked axes and the bevel on the convex needs to be steep. A short, fat, obtuse, convex edge geometry is quite bouncy and only good for splitting.

  • @harwoodblades3633
    @harwoodblades3633 Před rokem +2

    Very informative 👍if you want to check the angle buy a digital angle finder from tool station for £15 🤔I mainly use it for grinding knife bevels but handy for checking axe geometry..all the best Lincoln 👍🤙

  • @coffeeandlifting
    @coffeeandlifting Před rokem +2

    Good, concise explanation of good geometry. Lots of axe restorers who otherwise do very good work are still grinding their axes with cringe-worthy, obtuse bevels just to apex and call it finished. Nicely restored axes with terrible geometry are so prevalent that I had to unfollow most of the axe pages I used to follow on IG.

  • @polderfischer8565
    @polderfischer8565 Před rokem +3

    Thanks Ben for that perfect explanation!
    I prefer a little konvex, because there is nothing more exausting than a sticky axe.

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +2

      Convex is more sticky imo. Flat set up properly is far more easy to remove. Otherwise racing axes would all be convex

    • @awyrcoch
      @awyrcoch Před rokem +2

      ​@@benscottwoodchopper hang on there are 2 very different convexities, one is a convex bevel (in my experience that might make the axe a tad less sticky but mostly because it prevents too much penetration) and the other is a convex cheek (intended as a convexity parallel to the edge) which is what really makes the axe release the easiest, together with a slight curve on the edge profile.
      bottom line is, the ideal set up for chopping large logs is flat bevel (optimum penetration) + convex cheeks (easy release).
      convex bevel has its place, mostly in splitting axes and in very thin cheeks where the convexity helps protect the edge, and like Ben said thin cheeks (like italian axes which I use a lot of) are very good for limbing and small diameter chopping because they penetrate deep.
      finally, no room for any convexity on carpentry, carving, woodworking bevels, they must be dead flat there.

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      @@awyrcoch yeah really need to come up with 2 seperate terms to avoid confusion

  • @BlueGorillaInTheMist
    @BlueGorillaInTheMist Před 5 měsíci +2

    Suuuuper good video. Thank you.
    When you mention edge angles in your videos, are you referring to the angle for each side (of the edge), or an inclusive angle?
    In other words, if you refer to a 20° angle, does that mean 20° per side for an inclusive angle of 40°, or 10° per side for 20° inclusive?

  • @CFAS102
    @CFAS102 Před rokem +2

    Hi Ben, thanks for this explanation; real rookie question here but how much of a difference does the angle that you hit the wood make (for chipping the wood out)?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      You want to be hitting the log at 45°, the notch should at least be the same width as the diameter of the log

  • @corymiller9854
    @corymiller9854 Před rokem +1

    Great vid. I have started to file my cheaper axes and had good success. Looking to fix up my gransfors felling axe. It does not chop in enough seems you mentioned this axe in this vid. Should I take the cheeks off a few inches back? This has worked so far on my other axes and it seems you call that a flat grind?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      flat grind is a flat bevel from cheek to edge, sometimes with a secondary bevel

  • @jeanmartox3570
    @jeanmartox3570 Před 9 měsíci +1

    Salutation to French Forester! La hache que vous utilisez à 6:30 est la forme typique Catalane! c'est surprenant de la voir entre vos mains!

    • @benscottwoodchopper
      @benscottwoodchopper  Před 9 měsíci +1

      I bought that one in northern italy from a junk shop, it seems to be a popular style there too

    • @jeanmartox3570
      @jeanmartox3570 Před 9 měsíci +1

      @@benscottwoodchopper ahhh les haches Latines!! Encore merci pour votre engagement à instruire! Bravo!

  • @bengg6772
    @bengg6772 Před rokem +1

    Thank you for your clear and practical informations !
    Well I see clearly the wedge profil on an hultafors HY. A thin one, but a wedge that enlarge relatively quickly (not as quick as a dedicated splitting axe of course)
    For understanding purpose : on a Gränsfors Scandinavian forest axe, for the same weight at the hultafors HY, the head is longer and seems thiner a long way before starting to enlage. Well Can I assume better for chopping light and/or small diameter but less "general purpoose" ?
    And sorry, one last question (lol) : any thought about carpenter axe ? hultafors SY SV or Stålberg for 1.5 hand light axe ? And if they had a longuer handle ?
    Thank you :)

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      The carpenters axes are okay but i prefer italian axes for light axe choices. Yes thinner profile axes are better for limbing and small wood but dont chip the wood well

    • @bengg6772
      @bengg6772 Před rokem

      ​ @benscottwoodchopper Thank you a lots for your answer and availability. Thx to you I'm starting to have a good vision, a paper one of course actually, of the market and possibility. Well I will probably give a try to 2 or 3 axes (probably two, because the cheaper one additionnée ... ) : Hultafors HY 10 0,9 (price point), Rinaldi 300 700Gr or 900gr (price point and tomahawk style handle) and a if possible light splitting axe (dont know ... grans fors small splitting axe is so expensive )
      Thank you again

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      @@bengg6772 i would get the hy10 1.2kg rather than 0.9 and the rinaldi 700. Better variety of use and weights that way. Small splitting axes are somewhat pointless, they dont work much better than felling axes in small wood for splitting

    • @bengg6772
      @bengg6772 Před rokem +1

      @@benscottwoodchopper Thank you. Hum indeed, good advice, two axes, two usage.
      Hum indeed the small splinting axe from Gränsfors have a head of only 1kg ... with wide pattern for sure. But not heavy enough to be interesting/usefull/useable probably.

  • @townieoutdoors8121
    @townieoutdoors8121 Před rokem +1

    Any advice on thinning a handle even . I feel like I won't be accurate thinning each side evenly.
    Lo e your channel by the way !

  • @emmanuel.belanger
    @emmanuel.belanger Před 7 měsíci +1

    Thank you Ben for this introduction. Just wondering, do you make the micro bevel with your belt sanders too?

  • @roxandarveau6188
    @roxandarveau6188 Před rokem +3

    I am curiouse about how different aze geometry wear over time. I feel a fine or hollow ground axe would keep their effectiveness over much more sharpening or quantity on metal remove over time by sharpening it. A wedge axe would either need longer and longer primary bevel to stay at the same angle or if you keepe the same bevel lenght it would need to have a broader angle.
    I feel like a wedge axe would not stay effective over its live time

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      wedge shaped axes get stubby and ineffective much faster with wear

    • @roxandarveau6188
      @roxandarveau6188 Před rokem +1

      @@benscottwoodchopper so it's not juste an impression thank you for your answer

  • @Buggapanda
    @Buggapanda Před rokem +2

    Hey Ben, thanks for the explanation! I do have a question about splitting axes, splitting mauls in particular, and that is how thin would you get the bevel and how important it is for them to be "sharp"? Does having a thinner edge help them bite deeper in the wood to start the split or is it way less relevant given the mass and momentum of the rest of the tool?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +2

      With mauls sharp definitely helps, but the bevel doesnt need to be very thin

    • @davidwyby
      @davidwyby Před rokem

      Experiment and match to the wood you are splitting to find the balance between bounce and stuck.

  • @zepratas363
    @zepratas363 Před 5 měsíci +1

    Hi Ben. I have an Hultafors hy 10-1.5 and following your advice, I tried to thin the cheeks with a coarse file but it got me nowhere. I recently bought a bench grinder and I was wondering if I could use it to thin the axe head but I’m afraid I’ll ruin my axe. I am concerned the grinder shape will make the axe cheeks to concave and also if the high temperature from the friction will ruin the steel. Do you have any advice on this? Thanks and congratulations on your content!

    • @benscottwoodchopper
      @benscottwoodchopper  Před 5 měsíci +1

      Regularly cool the axe in water, you can rough out the shape of the grind with an angle grinder then smooth it with a file. Bench grinders are possible but less effective and hardrr to get good results with but doable

  • @daweed4255
    @daweed4255 Před rokem +2

    Have you tried the ochsenkopf universal forestaxe? It is actually the first axe I bought and stock it is absolutly stupid with the red steel caller. I sharpened it a bit and use it as a root-buster atm… :D I an wondering if it would be a nice axe if you rehang it on a thinner, usable handle and give it a good flat grind. It might just be a fatter Iltis.

  • @firehanshg
    @firehanshg Před 6 měsíci

    Hi ben, may i ask where did you get the axe you were using for chopping the Birch tree, the very shiney axe head? can you please provide a link if possible. keep up the good wrok.cheers Hans.

  • @jeffreydustin5303
    @jeffreydustin5303 Před rokem +1

    terrific summary, I learned a lot. how much do you want for that Genova axe?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      Its one of those axes i cannot put a price to, however rinaldi made a limited batch of essentially the same bergamo pattern exclusive to les frontiers outils worth checking out

    • @jeffreydustin5303
      @jeffreydustin5303 Před rokem

      @@benscottwoodchopper Thanks. I'll check it out. Basically you were talking about throwing chips and I wonder. If you had an axe that somehow was a razor blade and "magically" strong enough to withstand the forces, would that magic axe paperthin slide into the wood and get stuck and not throw chips? In other words, if the axe can slice into the wood, and you cut both sides of the notch, won't the chips fall out even without geometry because of the depth of cut and gravity?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      no otherwise wood round would fall to peiecs naturally and splitting axes would be useless

  • @SuperM1man
    @SuperM1man Před rokem +1

    Dang I wish you had a vaughan sub zero to revew they have a huge banana grind a hollow grind I believe it was the old American standard for cutting redwood trees .vaughan and or plumb axes

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      Ive seen them in another persons videos, looks more like a chisel grind with a big hollow behind the edge to me. For redwoods the puget sound pattern was used made by plumb, sager, true temper and a few others

  • @catmakinbizkitz
    @catmakinbizkitz Před rokem +2

    I have been enjoying your content. I have recently been working on restoring an older american jersey style axe from sager warren, which needs a banana style grind, its my understanding that generally they were not ground out of the factory and that was generally something that was done later by the purchaser, and this was never done to this axe, it's very thick in middle and i've been filing and filing, spent a couple of days on it, and I was wandering if you knew of a faster way to remove a lot of material but still keep the accuracy, or perhaps there's a more aggressive file that I could look into purchasing? at this point i might also be considering just spending a little time working on the bevel every time i use it but I feel like it might be years before I actually get the bevel where I want it...

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      Yeah filing takes quite a long time, i use a belt sander these days just need to watch the heat

    • @catmakinbizkitz
      @catmakinbizkitz Před rokem

      @@benscottwoodchopper thanks, and chance you have any content detailing your process with that or recommendations? i've been wanting a belt grinder for a while but haven't really had a great need that justifies getting one, but I just might... i tried using one of the larger knife making ones at a friends house, but I feel like it might be kind of hard to be accurate with an axe vs grinding knives. it was fun though

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      @@catmakinbizkitz i filmed the process with racing axes for normal axes i dont worry about finding a centrepoint, just hold it at a good angle czcams.com/video/GYdGSN-lPns/video.html

    • @catmakinbizkitz
      @catmakinbizkitz Před rokem +1

      @@benscottwoodchopper nice, thanks! That little Makita grinder is sweet!

  • @williaminkley1587
    @williaminkley1587 Před 9 měsíci +1

    If I wanted a "sticky" say for axe throwing, would a concave edge give an advantage. Although this would nake the seconadry bevel fragile?

  • @iCanHazTwentyLetters
    @iCanHazTwentyLetters Před rokem +1

    I need an axe for felling and limbing.
    Looking at Muller Biber Forrest vs. Ochsenkopf
    Which one is better in your opinion?

  • @jordanbailes7349
    @jordanbailes7349 Před rokem

    Do you have a suggestion as to the particular brand of angle gauge/a suggestion as to where to buy one?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      Veritas are good but theres loads out there and it really doesnt matter, you could even make your own

    • @jordanbailes7349
      @jordanbailes7349 Před rokem

      @@benscottwoodchopper thanks!

  • @kjohnson3505
    @kjohnson3505 Před 5 měsíci

    I've been seeing alot of cheap brands with concave (hollow) grinds coming through now.

  • @scottharrison5971
    @scottharrison5971 Před rokem +1

    What kind of shoes are you wearing? Are they axe splitting specific?

  • @roubenssonrw5862
    @roubenssonrw5862 Před rokem +1

    So It’s 10 degrees on both sides and it adds up as 20 degrees? Im asking because i read contradictory things online

  • @purplegas2779
    @purplegas2779 Před rokem

    I have a English rounding axe and Im not sure what kinda edge it should have for rounding I was wondering if you or anyone knows thanks

  • @Michalis_Karakostas
    @Michalis_Karakostas Před 6 měsíci +1

    What grit file do you use to put the micro bevel?

    • @benscottwoodchopper
      @benscottwoodchopper  Před 6 měsíci +1

      400

    • @Michalis_Karakostas
      @Michalis_Karakostas Před 6 měsíci

      @@benscottwoodchopper 400 Is the final grit in your progress or can I use after that, an 800 for example and then strop? Or just 400 is just enough before stropping?

    • @benscottwoodchopper
      @benscottwoodchopper  Před 5 měsíci +1

      @@Michalis_Karakostas 400 is fine, 1000 is more thani normally bother but do whatever you want and experiment, theres no do downside to it

  • @flugit
    @flugit Před rokem +1

    Do you have a review of that China head?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      Yes, its extremely good for the money

    • @flugit
      @flugit Před rokem

      @@benscottwoodchopper I ordered one a few days ago, think it'd survive use as a general work axe with a 20ish degree grind?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem +1

      @@flugit yeah i havr one which has

    • @flugit
      @flugit Před rokem +1

      @@benscottwoodchopper thanks Ben

  • @tlumaczy1507
    @tlumaczy1507 Před rokem

    Hello, there! Is it normal for 8 pounds splitting moul to be asymetric?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      Not normal but there is a few i know of that are asymetric by design

    • @tlumaczy1507
      @tlumaczy1507 Před rokem

      @@benscottwoodchopper Stihl?

    • @benscottwoodchopper
      @benscottwoodchopper  Před rokem

      @@tlumaczy1507 asymetric in what way?

    • @tlumaczy1507
      @tlumaczy1507 Před rokem

      @@benscottwoodchopper When You look at ax head from the top making center line, ax blade is not in the center. When You hit log You always feel like it goes aside.
      My theory is that forces are directed one way to avoid blocking maul and splitt more efficiently.
      I don't know if i am wrong...

    • @tlumaczy1507
      @tlumaczy1507 Před rokem

      @@benscottwoodchopper I talk about regulars 6-8 pound maul...

  • @elemental4rce
    @elemental4rce Před rokem +2

    I JUST NOTICED SOMETHING DRASTICALLY DIFFERENT ABOUT YOUR CHOPPING IN THE INTRO! (anyone guess what it is?)

  • @mattg6136
    @mattg6136 Před rokem +2

    Chrs.Ben. Your a Ledge.

  • @beepboop204
    @beepboop204 Před rokem

    🙃

  • @albertlorenzen3048
    @albertlorenzen3048 Před 3 měsíci

    🎉😂😢😮😅😅😊❤