M.U.C.K sheath - a little Kydex ingenuity revealed

Daniel Koster

www.kosterknives.com
Knifemaker / Craftsman / Service Provider
Joined
Oct 18, 2001
Messages
20,978
Ok - I've had my fun this week and here's what I've got to show for it.


This idea has been brewing in the back of my mind ever since making a kydex sheath for my WSK. I've wanted to make a "wooden dummy" to use for making kydex sheaths....AND....while I'm at it, I decided to figure out how to make a SCRATCH PROOF Kydex Sheath.

Yes, that is right - this thing is nearly scratch proof. Meaning, the blade never touches anything inside the sheath at any time. Unless you pack it full of dirt....it's not going to get scratched.


And what better knife to practice on than the M.U.C.K.?!?


It's got a bit of a recurve-feel to the blade profile and the blade even gets wider as it goes to the tip. A DOUBLE WHAMMY when it comes to making kydex sheaths. If you just mold to the knife, you'll end up passing the blade through several spots that will rub it with whatever grit or dust ends up inside. Over and over again. Also, you end up having to make it wider than normal to allow for proper draw (since the blade is wider nearer the tip....the entire width has to pass through the sheath).

I used to make kydex sheaths for kukris and I've learned a thing or two about fitting up recurve blades. I may draw up a full tutorial someday....till then you'll just have to trust me that it is a PAIN to do them properly!


So, let's get to the pics. :D



First off, you need to understand that I am very careful about making sure that my knives are as similar (one to the next) as possible. I have templates for ensuring that handle fronts are ground to the same shape/size/etc. I'm not perfect, but I do the best I can and I get it pretty close across the board.






First up is a pic of the MUCK and the new Kydex sheath - Front side shown here:

MUCK-Kydex100702-01.jpg



Reverse side:

MUCK-Kydex100702-02.jpg


The extra hole you see near the bottom rivets is for drainage - being able to clean out your sheath is important!



Now for pics of the Wooden Dummy:



On top of the sheath:

MUCK-Kydex100702-03.jpg




Inserted in the Kydex Sheath:

MUCK-Kydex100702-05.jpg



Now with notes:

MUCK-Kydex100702-08.jpg



Rotated view to show the hump:

MUCK-Kydex100702-07.jpg




Next to the MUCK


MUCK-Kydex100702-06.jpg



repeated notes:

MUCK-Kydex100702-04.jpg





The area marked "Filled In" is to allow the kydex to "snap" closed around the back of the guard (as all good kydex sheaths should function) and yet remain wide enough so that when you pull the blade out, it doesn't rub along the surface of the blade.

You can see in the last pic....if I had just molded to the MUCK....the area behind the guard would be "closed" meaning front/back of the sheath are touching. Great for retention, bad for scratch marks.



The "hump" on the back of the handle allows the thicker part of the spine to be drawn straight back and not in a curve following the profile of the blade. Again, if I had molded it to the knife, it would *bind* inside the sheath when I try to pull it out. I'd have to draw the knife in a curbe. And to allow for that, the sheath would have to be much wider.

The 2nd benefit of the hump is the straight-in-straight-out drawing action of the sheath.

This will be true whether in standard package design, or my new drop loop sheath design.


Last but not least - the scandi grind on the "dummy". This retains the overall profile of the blade so that it seats nicely, but the grinds never touch the kydex...since the blade is a much thinner flat grind.


I made this sheath and tested it with a couple MUCKs already finished up and they fit great. And best of all, no scratching!



Thanks for looking and let me know if you have any questions!!

Dan
 
Sounds great Dan, no kydex scratching would be sweet! I've got an FBM LE that I've never used but it's scratched up from the kydex sheath. I do have a question though...why do your kydex sheaths run so high up the handle instead of just past the guard? I noticed this when I received my WSS Necker with silver twill G10. It's a nice sheath, I just wish more of the silver twill was exposed because approx. half of the handle is coverd by kydex when it's sheathed.
 
Couple reasons....

Smoother in-n-out sheathing/drawing of the knife.
Definite *snap* when it's all the way in.
Room for "adjustment" if I need to tighten the sheath even more.
I typically start the sheath at the fullest part of the handle [- which results in the largest opening for putting the knife back in.

Great question.

Thanks!

Dan
 
This was fun to make. I will probably do it more often. Works best on knives that have very little variation in the materials. But I can *adjust* any sheath once made to fit the individual knife perfectly before I ship it out.

:thumbup:

Dan
 
I have carried two of his prototypes with a higher sheath like that. Great retention, and super easy insertion as well. I liked them a lot.
 
Thanks!



I should mention that a "wooden dummy" is not needed for knives with straight spines - like my Bushcraft, BushMaster, etc.

Another knife this would be good for is the Survivor.

Maybe on the next run.

Whoops!?!?

Did I let the cat outta the bag?

:D :p

Dan
 
That's cool. I've got several knives that look like I drove them through a car door, even though they've never been used. Great system, Dan. I want one with my Zombie Slayer! :)
 
Thanks, Allen. :thumbup:

chainring - the Zombie Slayer in Kydex - :eek: :eek:

I think my oven just *fainted*



LOL

Dan
 
Dan,
I have done a few scratchless one-off Kydex sheaths for my self for my BM's and BC's but instead if using a wood dummy(takes too much time for one knife) I use a roll of 12" wide duct tape so the kydex shows no overlap marks to wrap the knife(and a sharp Xacto No.11 to trim) to give the desired Kydex to knife clearance.
Oddly I collect wooden knives. I have some I've bought at various knife shows,gun shows,garage sales,auctions,etc. Why do I buy them? Who knows.Why do people make them??? The ones I have definately weren't Kydex molds-too crude-too old. Maybe a really cheap industrial arts shop class project?WW2 era? Most seem to be at least 50+ years old. WTB-Wood knives....
 
Yes - see above comment that a wood dummy is not needed for straight-bladed knives. The MUCK, being a bit like a kukri in profile, needs a wooden dummy or else the sheath would scratch it every time, tape or not.

I do the tape trick for regular knives. Don't need to wrap the handle, though.....just lay a piece across each side of the blade.

:thumbup:


I make a lot of wood knives, templates and even the occasional sword for the kids....they love 'em. Or, rather, they love to destroy them. :D

Dan
 
Yep. :thumbup:

Also, I widened the blade in front of the guard to allow the blade edge to come straight out without rubbing the sheath.



Here's a pic of a drop loop kydex sheath using the same wood model.

MUCK100805-05.jpg



MUCK100805-06.jpg


Dan
 
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