The "Ask Nathan a question" thread

Discussion in 'Carothers Performance Knives' started by JustinFournier, Aug 30, 2016.

  1. Nathan the Machinist

    Nathan the Machinist KnifeMaker / Machinist / Evil Genius Moderator Knifemaker / Craftsman / Service Provider

    Feb 13, 2007

    Integral Dagger:


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    ^ those are a bear
     
  2. Big DJ

    Big DJ Gold Member Gold Member

    Oct 29, 2013
    Those are truly a work of art.
     
    woodysone, jus_gus, fatfrog and 6 others like this.
  3. benchrest308

    benchrest308 Gold Member Gold Member

    297
    Mar 13, 2014

    tenor (1).gif
     
  4. benchrest308

    benchrest308 Gold Member Gold Member

    297
    Mar 13, 2014
    .....please....?
     
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  5. vkp78

    vkp78 Gold Member Gold Member

    329
    May 6, 2014
    Love at first sight
     
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  6. BIGDORK

    BIGDORK Gold Member Gold Member

    545
    May 27, 2018
    ETA: I've been drinking, carry on
     
    Last edited: Jan 16, 2021
    woodysone, jus_gus, duramax and 7 others like this.
  7. Burke

    Burke Gold Member Gold Member

    Feb 25, 1999
    I couldn’t swing 6k for that at this point in my life but I would get a good part of the way there. Really incredible intersection of design and craftsmanship.
     
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  8. SharpPancake

    SharpPancake Gold Member Gold Member

    231
    Dec 30, 2018
  9. Nathan the Machinist

    Nathan the Machinist KnifeMaker / Machinist / Evil Genius Moderator Knifemaker / Craftsman / Service Provider

    Feb 13, 2007
    Here, this is from a thread a few years back when I made the dagger



    This was a special project I've been working on here and there for a while now that I finished in time to show at Blade this year. I've posted a few pictures on IG but, being a regular here, I thought you folks might want to see it too.


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    It's a 14" integral made of CPM 3V at HRC 60.5 with the Delta heat treat protocol, so it is a "real" completely functional large dagger, not an "art knife". It's 14 5/8" from tip to guard, 20 3/4" total length, 3 1/2" across the guard and about 15/16" at its thickest in the pommel. It is .350" (a hair under 3/8") at the ricasso.

    It started out a little over 24 pounds and ended up a little over 24 ounces

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    I used deep hollow grinds in the blade and varied the cross section of the fuller from 3/8" diameter to 1/8" diameter as it went along the length of the blade to maintain the depth of the fuller in order to remove unnecessary weight from the blade...

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    ...and being an integral one can't really put material back on so I used engineering software before I started cutting it to size the weighted pommel to put the center of gravity just ahead of the guard.

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    So despite being pretty stout (almost 3/8" at the ricasso)...

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    ...it's 24 ounces, not at all heavy for its size.


    I did a variation of the "two tangs" thing again that I've done on previous work.

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    I like this kind of tang both aesthetically and functionally. It's a cool look that you don't see much, and despite tapering down pretty thin it's robust because it has a pretty good cross section of steel in both planes.

    I twist the grinds in a shallow helix out into the blade and then twist back steep again as it approaches the tip.

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    This twisting of the grinds allows me to control the thickness of the blade along its length rather than simply letting it become the natural result of the intersection of the grinds and fuller as the width of the blade narrows. The goal being a strong robust point that can penetrate hard objects with a lot of force with minimal risk of breaking.

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    ^ left to their own, the intersection of hollow grinds creates a weak hollow center ridge at the point. This was forced into a stout convex center section. Historically, weapons were commonly done this way, but I don't see it done this way very often today.

    My goal with this dagger was not a historical reproduction of a particular blade of a particular era. Instead I was thinking about a bladed weapon as a killing tool in a modern context. And, not a modern "tactical" dagger, but a classic weapon made in a modern manner. It's difficult to really convey the feel of a knife but the metal and scales are not polished into something shiny and slippery but left textured. The handle is sized for a large hand and shaped to sit across the hand at an angle to project reach. It isn't heavy or clunky (unnecessary weight was removed from the center of the handle and the center of the blade), though it is weighted on the ends as these were historically done to resist deflection from an impact, and as a result it doesn't flick around lightly but wants to stab in a straight line.

    I'll post some work in process pictures next...
     
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  10. Nathan the Machinist

    Nathan the Machinist KnifeMaker / Machinist / Evil Genius Moderator Knifemaker / Craftsman / Service Provider

    Feb 13, 2007
    I took a few pictures of the process during the build

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  11. Twindog

    Twindog Gold Member Gold Member

    Apr 6, 2004
    Wow!
     
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  12. Big DJ

    Big DJ Gold Member Gold Member

    Oct 29, 2013
    It truly is a thing of beauty.
     
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  13. Xr6x

    Xr6x Gold Member Gold Member

    Sep 17, 2015
    Truly a blade of perfection in workmanship as well as beauty :thumbsup::thumbsup:
     
  14. Casinostocks

    Casinostocks Factotum Gold Member

    Mar 20, 2016
    Nathan, I have a pretty good idea as to where that 6K figure could have come from: perhaps you just extrapolated from the last project + added inertia on your part to start on another I.D project(s) with all the additional work load / expansions which you have taken on since. however, considering that last Internal Dagger was both unique and a one-off custom project, maybe one day, someday, you will find the motivation to do a limited and exclusive run of the 10" I.Ds.

    TBT, I will balk at 6K but I will gladly add my name to a list for the 10" version in D3V if the numbers become feasible to you at all in the 3K+ region (give or take). I think that you will find up to 20 like-minded folks, perhaps more if you get multiple orders, right here in your sub to get this project off the ground. I will only speak for myself, but I will gladly pay fully upfront and then wait 2-3 years for such project to get to completion. Do not dismiss a trial balloon on this one so summarily ;)
     
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  15. fonedork

    fonedork Platinum Member Platinum Member

    Jul 7, 2011
    You shouldn’t do another integral dagger for less than $9000 imo. Don’t undervalue your time...it’s all we really have to sell in this world
     
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  16. Casinostocks

    Casinostocks Factotum Gold Member

    Mar 20, 2016
    I promise that I won't be!

    #stillnotnathan
     
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  17. beattheheat

    beattheheat Gold Member Gold Member

    310
    Jan 13, 2018
    exceptional craftsmanship sir!
     
  18. bluemax_1

    bluemax_1 Gold Member Gold Member

    Jan 17, 2014
    Soooo... you could scale that up 2x the size and make an integral CPK Bastard Sword? :D
     
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  19. Richard338

    Richard338 Gold Member Gold Member

    May 3, 2005
    Based on my frustrating experiences trying to make a fuller and a distal taper on a mill at work, I declare this not only a masterpiece whatever the method of construction, but also a master class in machining. Congrats!
     
  20. SharpPancake

    SharpPancake Gold Member Gold Member

    231
    Dec 30, 2018
    Integral dagger is a work of art.
     
    woodysone, jus_gus, Phill50 and 4 others like this.

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