Tag Archives: khukuri

How To Make a Kydex Cross Draw Khukuri Sheath

I recently made a sheath for a khukuri with serrations on the back of the spine and it was a bit of a learning experience compared to how I normally make a khukuri sheath and though I would share what was done.  The khukuri in question had a nicely done blade and fitment was good.  It had about a 10″ blade, 6″ handle and 16″ overall.  The spine was between 1/4-3/8″ thick.  All in all, it was a medium weight nice khukuri though I am not really sure who made it

Now for this weight range, I could go with .080 or .093″ Kydex.  I went on the heavy side and used .093″ thick black Kydex that I buy in 12×24″ sheets – usually from www.knifekits.com.

So, first up I do two layers of blue painters tape on each side to allow for some “wiggle room” between the blade and the Kydex.  If you want it tighter, use just one layer.  I would recommend having this space to allow for dust, dirt, etc.  Next up is to trim the Kydex so it is long enough to have a bit of material past the end of the blade, a few inches onto the handle and then an about 1.5″ or so on each side when the Kydex folds over.  If you want to use two pieces, you certainly can.  The final sheath I did for this khukuri uses two sheets of Kydex trimmed to size.

Once the Kydex is trimmed to size, you need to heat it to around 360F but less than 400F.  I Use a 16×20″ MPress Heat Press with a digital controller to set the temperature at 360F and to heat the Kydex for 40 seconds.  Note that I also have Teflon/PTFE sheets attached with rare earth magnets to protect the press’ faces if the Kydex were to melt. 

In years past, I used a modified hot plate / electric griddle to heat my Kydex.  For a tad over two years now I have had the MPress and really like it.  At any rate, once the Kydex is hot and pliant, you need to mold the Kydex to the blade.  In this first take, I used my HD Industrial vacuum press to do the work.   You draw the vacuum down and let the membrane do the work and cool down so the Kydex stiffens again.

 

Next up, draw your planning lines around the blade.  You need to figure out your rivet pattern and then drill the holes.  I do 0.75″ centers to accommodate large Tek-Lok belt fasteners among other options.  Notice the big flap drawn at the top above the handle.  That creates the “funnels” that will guide the khukuri into the sheath and then lock it into place.

Next, debur the holes with a deburring tool such as the Mango II in the above photo.  Then, install the correct size rivets in the holes.  Orient the larger factor finished end of the rivet to be facing viewers when the blade is carried.  It looks better than the small end that results after compressing the rivets.  After that, use a rivet tool to flare and secure the rivets.  I use purpose-built dies in my 1/2 ton arbor press to do that but there are cheaper manual units for use with hammer.  If you plan on doing many sheaths or holsters, go with the arbor press.

Here’s the result.  Note that the round tools are what I use to form the funnels.

Next, I use a band saw to cut close to the outside cut-off line I drew.

I then use a Rigid Oscillating End Sander to do the shaping.  I bought thebunitat Home Depot two years ago and it works great for this.  I use a 40-60 grit belt to quickly do the grinding.

Now I did the test fitting and had an “oh crap” moment.  I normally expose the blade to allow for quick insertion and extraction but I couldn’t do that with this model due to the serrations.  They were exposed and would clearly hang up on everything so it was time to come up with a plan B.  It dawned on my that I needed something to serve as a “sheath” for the serrations that would give me work room inside the sheath once it was formed.  So after thinking about for a few minutes, I took some 3/16″ fuel line, slit it down the middle and pulled it onto the khukuri.

I also wanted the khukuri to push a lot further into the rear piece of Kydex so that meant I needed to use the khukuri press that I designed just for this.  It is built like a tank from layers of 3/4″ plywood and uses four 500# Quick Clamps to compress the Khydex.  The results is tight uniform clamp around the handle and blade of a khukuri.

Next, it was time again to mark, cut and rivet the sheath.  Again, note the tabs drawn above the handle to form the funnel.

After cutting, I use a heat gun to heat each tab and bend it over a round mandrel.  I have a 1/2″ round piece of aluminum that I normally use.  Note, I have burned out a number of cheap heat guns.  The DeWalt is over two years old and still going strong.

I use MEK solvent on a rag to smooth over the edges of the Kydex and make it look good.  If you use MEK, be sure to wear solvent gloves and work outdoors or in a very well ventilated area.  That stuff is hot – meaning it evaporates fast and is not something you want to be breathing.

I used 1″ heavy duty nylon webbing for the retention strap along with a snap stud and quality heavy-duty #24 snap head.  I heat an old small screw driver to melt a hole in the strap for the stud and the snap head and then a purpose built die in my arbor press to actually open the rivet head inside the snap.

The Tek-Lok is secured to the sheath via slotted posts, screws and rubber spacers cut to the length needed.  Note, use Vibra-Tite or blue Loc-Tite to secure the screws and nuts or they will work lose and fall off.

Here is the end result.  The old buffalo hide and wood sheath is above for reference.  I like adding paracord for lashing and survival use.

In the next photo you can see the opening for the tip of the khukuri to slide into – that pocket is essential.  Once the tip is inserted, the handle is pushed towards the funnels that open, allow the handle to pass and then spring closed locking the handle in.  To truly lock it in and protect against brush, you need a retention strap that serves to keep the sheath closed – if the sheath is held shut then the blade can’t come out.

Here are two more shots

I hope you found the post of interest!


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How to make a custom khukuri handle for a rat tang with micarta and epoxy

I am a huge fan of Nepalese khkuris including ones from Himalayan Imports and GK&Co (Deepak Sunar).  I do like customizing them also and have made handles many ways for both the full-tang and rat tail tang blades.  What I am going to show below is a rat tail tang and you’ll notice the curve the tang has.  This is the traditional tang and is very strong.  Westerners have a mistaken belief that full-tang is better.

The Nepalese bladesmiths, known as “kamis”, have evolved their design over centuries based on real world experience.  Their rat tail tang is very strong, allows for the traditional handle to be changed relatively easily and since the handle can flex somewhat on the tang, some of the shock is absorbed there vs. by the wielder’s hand.  When the British arrived they mandated a full tang on their Army models based on their experience and beliefs.  In short, when you are looking at khukuris, do not discount rat tails as weak because they are not.

The first step I do is to blast my slabs of Micarta to prepare them for maximum adhesion.  I am a zealot on cleaning too before gluing.  Do not attempt to glue the shiny micarta to the blade or it will knock right off with the first shock. Basically we are going to make a handle by sandwiching a piece in the middle that has the tang outline cut out between two outer slabs.  These are black canvas micarta slabs that have already been blasted – that is why they are dull.

The thickness of the middle slab needs to be the same thickness as the thickest part of the tang to keep things simple.

Next, I lay the middle slab under the tang and trace its outline.

I was doing two blades at once.  See the one above sitting in the cut out notch and the one below I have just traced the outline with a Sharpie marker.  Please note I have not taped the edge of the khukuri’s blade yet.  I would recommend you do that at some point to protect yourself.

This is slightly out of sequence but see the two round drill holes at the end of the tang?  I did them before sawing to make turning around at the end easier.  The numbers marked on the micarta correspond with which of the two blades I was working with.

I would then use a jig saw or band saw to cut the section out where the handle went.  Note, I more often use a band saw these days and you can do whatever works for you.

See how the tang fits in?  It does not need to be perfect as this will all be filled with structural epoxy.

I do not have a photo, but I would abrasive blast the tang until it was clean shiny steel.  I would wear nitrile rubber gloves and hose everything (tang and slabs) down with brake cleaner to make sure no oils from my skin contaminated the work pieces.  Note, I often drive a 1/8″ brass cross-pin in through the thick part of the tang to lock everything in place just in case and also use a piece of thick wall 3/8″ brass tube at the rear to make a lanyard hole.  I did not do these things on this particular model and they are features to consider.  For people new to this, I would recommend the brass cross pin.  I always do this now even though I have never had a handle fail but I evolved this method and learned over the course of a number of years.

Next, take the outer slabs and round the outside edges over.  What you want to do is to create the taper you want before you glue the handle on.  It is hard to sand up front on the handle once it is glued together.  I would take the three pieces, clamp them together and then work on the belt sander until I got the shape I wanted on the front leading edge.  This is all we want to shape at this point.  I always preferred to do the majority of my shaping once the handle was epoxied onto the blade.

For gluing the handle, I will only recommend Brownell’s AcraGlas liquid.  It is a very strong, durable, and shock resistant epoxy.  Absolutely do not use a cheap epoxy as it will likely break down and crumble (“sugar”) over time with repeated heavy blows.  Always bear in mind that the big khukuris are choppers and heavy.  What you do needs to hold up under extreme use compared to many knife handles that see very light relative use.  To be safe, I would recommend you always abrasive blast the steel and the micarta before applying the epoxy – don’t try and just get by with sanding or otherwise scuffing the surface.  By blasting you are almost doubling the surface area for the epoxy to adhere to and the irregular surface creates countless shapes where the epoxy can get under “ridges” in the micarta and the steel to really securely hold the parts together.

Follow the AcraGlas mixing instructions to the letter.  I add in a bit of milled 1/32″ glass fiber to increase the strength in the filled areas.  The ratio for AcraGlas liquid is 1 part hardener to four parts resin and I’d add about 1 part of the glass fiber.  It is a bit of a balancing act because you do not want to make the resulting epoxy too thick.  You need it to run in, fill voids and seep into the micarta as much as possible.  [To get the most out of your epoxy, please click here to read a post I did a while back detailing my lessons learned over the years.]

Next, cut a piece of wax paper to wrap the handle.  You want to apply a ton of epoxy, clamp the heck out of it and let it sit and cure for 24 hours.  When you remove the wax paper, if there are any imperfections you need to fix by adding more glue, first blast the surface, clean it and then glue it.  Do not just put epoxy on top of epoxy without preparing the surface first.

Next, if you haven’t done so yet, tape your blade’s cutting edge to make sure you don’t get sliced when sanding the handle.  When working with a belt sander it can grab hold of the work and surprise you – you don’t want a sharp edge to be flying around!!

I do a lot of my handle work on a Rigid oscillating belt edge sander from Home Depot with 40-80 grit sand paper.  Hook your shop vac up to suck up the dust and be sure to wear both a good dust mask (such as a N99 rated mask/respirator) and eye protection.  The dust goes everywhere so be sure to have the vacuum hooked up and stop periodically to clean up and also to inspect your work.

In terms of shaping the handle, I will relay a piece of funny sounding advice – remove all the material that isn’t part of the handle.  Really useful, right?  When the fellow told me this years ago his point was that making a handle is applied art.  You are sculpting a handle by removing material and working towards a shape you have thought out.  I would remove a bit and test the feel, remove a bit and test the feel over and over.

I have experimented with many shapes over the years and it is really up to you.  I would stick with coarse sanding to keep the handle from being slippery and did both one handed and hand-and-a-half models.  In all cases, I wanted to user to have control while chopping / hacking with the blade.  One real strong recommendation:  ALWAYS build a finger stop or hand stop into your design.  You do not want a hand to slide forward onto the blade.  I always built the stop into the handle but you could certainly make your own metal cross guard or do something else — just be sure to protect the user’s hands.

The below blade is acid etched with a combination of apple cider vinegar and phosphoric acid and then everything, including the handle, had boiled linseed oil (BLO) applied to it. [Click here for my post about acid etching blades.]

 

This is a handle from a big HI WWII model blade.  Note the lanyard hole at the end.  I would drill the hole both for a friction fit and I would cut the tube longer than needed, blast it, clean it and then apply epoxy liberally before inserting it into the blade.  I would then sand it down to size as part of the final shaping of the handle.

This is black paper micarta that comes out a beautiful obsidian black.  It is on a long, elegant 24″-ish Sirupati.  Notice the oversized pommel to serve as a hand stop and the finger groove up front for indexing and grip.  This is a hand-and-half design meaning a person could grab hold with their second hand if they really wanted to.

The cool thing with the handles is that you have a ton of materials and options to consider to make a very unique functional piece.  I hope this blog post gives you some ideas.


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How to Moisturize a Horn Handle on a Khukuri

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I regularly am asked about how to moisturize or condition a horn handle.  This is important because if horn shrinks then it will likely split because it can’t shrink uniformly due to all the glue, different moisture levels, etc.  With that said, there is a very easy fix.  You can use hoof conditioner for horses to impart oils back into the horn.  I gently warm the horn slightly and the conditioner and then rub it into the horn by hand.  It’s important to use a bare hand so the warmth of your body is helping keep everything liquid.  I will work the conditioner in for about 5-10 minutes and then let it sit until it looks dry and depending on the temperature that might be 10-15 minutes or even just when I get back around to it.

I then repeat the above 2-4 times depending on how fast the conditioner is being absorbed.  I then buff the horn with a cloth handle and let it sit.  That’s it – mission accomplished.

I would recommend to khukuri owners to do this a couple of times per year if possible – especially in the fall and spring when the temperatures and humidity are changing.

I like Hooflex but just about any will do.  This may just be a personal preference but I was told to use thicker conditioners years ago vs.