1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

  2. Week 39 of the BladeForums.com Year of Giveaways is live! Enter to win a Cold Steel Tuff Lite & Cold Steel Prize Pack

    Click here to enter the drawing for your chance to win a Cold Steel Knives Tuff Lite & Cold Steel Merch Prize Pack , Bladeforums.com swag or memberships!
    Be sure to read the rules before entering, and help us decide next week's giveaway by hitting the poll in that thread!

    Entries will close at 11:59PM Saturday, Sept 28 ; winners will be drawn on Sunday @ 5pm on our Youtube Channel: TheRealBladeForums. Bonus prizes will be given during the livestream!


    Questions? Comments? Post in the discussion thread here
  3. Week 38 drawing for the BladeForums.com 20th Anniversary Year of Giveaways live stream, going on from 5-6PM eastern!!
    Tune in to our YouTube Channel, http://www.youtube.com/TheRealBladeforums, we'll be drawing winners for BladeForums.com merchandise & the grand prize:
    a Kizer 1034A1 Gingrich Bush Knife & Ka-Bar Dozier Folding Hunter , along with BladeForums branded gear!

    Additional prize(s) will be awarded to people in the livestream chat, so watch for your chance to win bonus prize(s)

Mirror'd edge, why bother?

Discussion in 'Maintenance, Tinkering & Embellishment' started by Securis, May 5, 2017.

  1. miso2

    miso2 Gold Member Gold Member

    Nov 19, 2014
    My pleasure!

    Miso
     
  2. Phixt

    Phixt

    May 28, 2016
    Well I sure am glad I read all this. Thanks to all the contributors.
     
  3. Jake_Lucas

    Jake_Lucas

    717
    Sep 21, 2012
    Reignited my interest in the topic, thanks! Nothing says more than those microscope images
     
  4. Lapedog

    Lapedog Gold Member Gold Member

    Dec 7, 2016
    I usually just go up to the fine sharpmaker stone. Although I do a few passes on the ultrafine just because I think it helps knock the burr off. The majority of the work is on the medium grits. I have absolutely zero luck with the sharpmaker diamond rods. The edge just seems to bounce off the peaks of the grit.
     
  5. Securis

    Securis

    69
    Jan 9, 2013
    What would you determine to make the edge "clean". Is it to finish lightly on a significantly high grit stone after putting on a course finish? or is there a specific method to clean an edge on any said finish.

    I've actually started an experiment on M390, Bencmade mini barrage. I've done the test for the course finish, 2000 grit diamond. I will be performing the test for fine finish in the next few days. I had the knife sharpened yesterday, but saw a flatspot, so i'll have to redo it.
     
  6. HeavyHanded

    HeavyHanded

    Jun 4, 2010

    In this context I'm referring to burr free and none or very little of the localized swaying back and forth off the line that some of his images show. It would be pretty much impossible to tell if the swaying is mostly gone without a SEM, but burr cleanup is a different story.
     
  7. on_the_edge

    on_the_edge Gold Member Gold Member

    Jan 31, 2006
    Interesting discussion here for sure. In re the above, isn't there a difference between cutting leather (or any medium for that matter) and simply puncturing it with a tip? I'm asking because you mentioned "protection to being cut or stabbed" and I always thought those two things were not necessarily related. I might be going to far afield here, but if you look at something like kevlar, it can stop some bullets from penetrating, but the pointy tip of a knife is will supposedly penetrate with surprising ease. Yet does that mean that a sharp edge will cut it easily as well? I do not know the answer. I do know that a few years back, a knifemaker died when a knife he was grinding/sharpening flew out of his hand and lodged in his chest. I don't remember who it was or if he had any chest protective gear on, but I sometimes wonder if it would have made a difference given how sharp our knives can sometimes be.
     
  8. Jason B.

    Jason B. KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jun 13, 2007
    I was into polished edges for a bit and thought they were great, then I was part of some CATRA testing and watched them fail miserably against the coarse edge. In truth it's not that they made that many less cuts it's just they had a dramatic fall off of edge sharpness whereas the coarse edge held a higher level of sharpness.

    Analogy would be to compare an alkaline battery to a lithium battery. The alkaline falls off steadily where the lithium holds a consistent level until the very end where it's abruptly stops working. Alkaline being the polished edge and the lithium being the coarse edge.

    And as always, the intended task can change the need for one edge type or the other.
     
  9. Wowbagger

    Wowbagger Basic Member Basic Member

    Sep 20, 2015
    If you like to ponder puncturing power of the point be sure to check this out if you haven't already :

     
  10. Kai Winters

    Kai Winters

    939
    Mar 16, 2012
    Because I like a mirror edge on a couple of my folders. The rest are "work" knives and just get a good working edge.
     
  11. Securis

    Securis

    69
    Jan 9, 2013
    That's a rough way to go man. I thought it was a rule of thumb to have the blade grind away from the user.
     
  12. Wowbagger

    Wowbagger Basic Member Basic Member

    Sep 20, 2015
    I have not had it happen to me and perhaps I am over reacting but all it takes is letting the mind wander, especially if one has had a bad day or a disagreement with some one, and snag the tip on a belt or buff and FLIP !
    Hard to tell which way it is going to go or where it is going to come to rest.

    I didn't watch this vid, I just saw the opening frame on YouTube but look at the sparks flying back at the operator. The knife would follow the same path if there was an anomaly. Like I said maybe I am over reacting.


    I grind mine on bench grinders and the white slow water bath wheel shown bellow but I'm just fooling around and not trying to make a living at it. (I have a basic table top belt sander but . . . nah dude, nah.)
    [​IMG]
    [​IMG]
    And lets not forget the super coarse diamond file. It did this and that is CTS-XHP (pretty hard and tough alloy and already hardened).

    [​IMG]
    [​IMG]
     

Share This Page