Photos ScrapYard War Dog INFI hand regrind

Discussion in 'Busse Combat Knives' started by kwackster, Oct 5, 2020.

  1. kwackster


    Dec 23, 2005
    Just finished hand regrinding this older ScrapYard War Dog in INFI steel using wet & dry SiC paper, first on glass then on rubber with WD40 oil as a lubricant.
    The old convex edge measured ~40 degrees inclusive at the heel widening to ~50 degrees inclusive at the belly, while the new convex edge measures an even ~30 degrees inclusive from heel to tip.

    Blade crosshatched with a red marker, which i find useful to see where exactly i'm removing steel in the beginning.
    The apex has been removed by pulling the old edge a few times very lightly over a fine diamond plate.



    The almost 6 mm thick INFI blade:


    After hand regrinding the blade on 1/2 a sheet of 180 grit SiC to a shallower convex edge (without producing a burr), while regularly checking with the Tormek AngleMaster to make sure that the new apex would fit in the 30 degrees inclusive slot.
    Time spent up to this point: 2 hours



    After the first refining steep on 1/3 of a sheet of 240 grit SiC, this time creating a small and even burr (only when the grit became increasingly finer due to SiC's friable nature)



    Busy refining the scratch pattern and the burr on 1/2 a sheet of 400 grit SiC, but now on a semi-hard rubber backing, again using WD40 as a lubricant.


    The burr has been removed on the Tormek leather wheel with 1.0 micron diamond compound to reveal a toothy edge that is reverse chesthair whittling sharp.




    Overall length: 24,5 cm
    Blade length: 12,2 cm
    Max blade thickness (ricasso): 5,98 mm
    Steel: INFI
    Hardness: 58-60 HRC
    Handle material: Resiprene-C rubber
    Weight: 176 grams
    Last edited: Oct 7, 2020
    lex2006, luethge, vkp78 and 14 others like this.
  2. Private Klink

    Private Klink Gold Member Gold Member

    May 30, 2017
    Nice work. :cool::thumbsup:
  3. tinfoil hat timmy

    tinfoil hat timmy

    Aug 21, 2014
    Good job.

    I always liked the war dog. It's like a little infi spike.
  4. unwisefool

    unwisefool Gold Member Gold Member

    Jan 22, 2007
    Good job, but holy moley, is that knife lying on the chest hair you shaved off? You are one hairy, beast of a man! :eek:

    TraditionalMedicinal likes this.
  5. kwackster


    Dec 23, 2005
    Only during full moon, :D
    TraditionalMedicinal likes this.
  6. kwackster


    Dec 23, 2005
    Personally i like the contrast of that thick blade with the narrow edge angle.
    It will of course never be the greatest slicer, but it will definitely make a sturdy & dependable hunting / survival knife.

  7. resinguy


    Feb 19, 2006
    Boyz gotz Skillz! :thumbsup::cool:
  8. PeteyTwoPointOne

    PeteyTwoPointOne Platinum Member Platinum Member

    Jun 10, 2014
    Very nice, optimal profile for that model <for my uses>.

    Question please, thank you: When you were doing your initial grinding on the primary, describe your basic grinding motion, such as: scrubbing back & forth, pushing only <edge leading>, pulling only <edge trailing>, etc.?
  9. Maggot Brain

    Maggot Brain Gold Member Gold Member

    Jun 11, 2012
    Nice work, War Dog is an old favorite of mine. Just so we're clear, 15 DPS is still a rather robust edge geometry... especially if it is a larger edge bevel width IMO. Of course, it may fail more acutely on harder items but for all but the roughest work it's just fine.
  10. rpn


    Mar 17, 2008
    I love the War Dog...such a lightweight powerhouse. I do wonder how awesome a 1/8" thick version would be though...

    Probably pretty fantastic...
  11. rpn


    Mar 17, 2008
    I love the War Dog...such a lightweight powerhouse.

    I have wondered what a 1/8" thick version would be like...I bet pretty freaking awesome.
  12. kwackster


    Dec 23, 2005
    Pulling the edge a few times very lightly over a Chinese 3000 grit diamond plate does two things: it removes the possibly weakened metal in the old apex plus it creates a very narrow and continuous light reflection all along the edge.
    I use this line as a guide to sneak up upon while sharpening, and in the end make it disappear as evenly as i can.
    On the 180 grit wet & dry i use scrubbing back & forth motions until my angle guide tells me that i'm nearing the 30 degrees inclusive mark, and from then on i change into pulling / edge trailing motions until i have reached both sides of the still flattened edge.
    Last edited: Oct 7, 2020
    PeteyTwoPointOne likes this.
  13. kwackster


    Dec 23, 2005
    I agree, 15 degrees inclusive is quite robust, and it's actually the largest inclusive edge angle i use for choppers like these 2 Condors in 1075 steel:

    and these Cold Steel kukri machetes in 1055 steel:

    and these heavily modified Cold Steel Heavy Duty machetes, also in 1055 steel:

    I also found that choppers with larger edge angles than 30 degrees inclusive tend to bounce off of harder wood types much sooner, even when they are sharp, and that 25 degrees inclusive edges can lead to edge rippling when chopping into certain wood grain that makes the blade go in a different direction suddenly mid-cut.
    Experienced this on a CS kukri machete in ~56 HRC 1055 steel.

    I actually sharpened the bevels on this War Dog to a hair below 30 degrees inclusive, and counted on the micro-convexing effects of my Tormek leather wheel with diamond paste to enlarge the apex to ~30 degrees inclusive.
    But this cannot be photographed clearly with a cheap camera.
    PeteyTwoPointOne likes this.

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