laminated kydex/leather tutorial

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Oct 28, 1998
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Some time ago I made a tutorial on making kydexsheaths. You can see that one here: tutorial

I was asked if I would do a tutotial on how I laminate leather over kydex so here goes. Alot is similar to the previous tutorial so have a look at that first.

I start by heating a piece of kydex big enough to fold around the knife. I fold it and place the kydex and sheath in a doublepadded press:

3.jpg


This is the result after the kydex has cooled down.

4.jpg


I roughly shape the sheath with bandsaw and grinder and drill the holes I need in the kydex for eyelets. I place them so they will fit the beltloop later installed.

I take a piece of 60 grit sandpaper (actually I use old belts that I tear in pieces.) and rough up the surface of the kydex. I put the sheath on a piece of leather (in this case green lizzardskin) and measure and cut the leather oversize. The sheath and the inside of the skin is coated with rubbercement and let it dry out good. Carefully to avoid airbubbles I wrap the leather around the sheath. Now the two materials are worked together with a rubberhammer. With a scalpel I cut the leather where I drilled the holes:

5.jpg


The eyelets are set on top of the leather:

6.jpg


Now the edges are grinded smooth and I soak the edges of the leather with Zap-Ca (superthin superglue). This is done to avoid seperations. I dye the sheath and give it a good coat of leatherwax and its done. Here its seen with a similar sheath in regular kydex:

7.jpg


And here is a picture of the knife inside:

bigsheep3.jpg
 
Great tutorial Jens!
Thanks for taking the time to do the pix and text and posting it for us!!
Very nice!
 
I requested the tutorial, and I really appreciate it. Thanks Jens
Kyle Fuglesten
 
Way to cool///I was curious how to glue the leather over the Kydex.Now can the kydex be glued together if you didn't want to make a sheath with eyelets?
Bruce
 
Are there any problems with the rubber cement bond shifting or comming loose over time/with heat? Or does the glue on the edge and the eyelets keep everything in enough tension so that this would be negligible.

WS
 
Jens, Many thanks for both of these great tutorials. Very nice presentation on both of them. :D :D

Originally posted by beknives
Now can the kydex be glued together if you didn't want to make a sheath with eyelets?
Hi Bruce,

The answer is "Yes" but the solvent used is pretty nasty stuff. Definitely read the MSDS on it at the link toward the bottom of this post.

Solvent to use for kydex welding
Tech support at Kleerdex, the mfr of kydex, recommends using tetrahydrofuran (THF) to "weld" kydex pieces together. THF is a PVC solvent of some sort. Cure time will depend on amount of THF applied, amount of moisture in the air, and temperature at which it cures. At house room temps, the engineer said to give it about 24 hours, so this is not a real quick curing solvent.

There was some info on mixing MEK (methyl-ethyl-ketone, available at paint store or home center) with paint to airbrush onto kydex. The MEK will apparently break down the slick kydex skin enough for the paint to grab onto the surface.

According to the guy at a local plumbing supply house, there's THF (plus MEK) in a multi-purpose plastics cement made by IPS. That might work for chemical kydex welding.

The MSDS on THF is here: http://www.bandj.com/BJMSDS/MSDS_PDF/THF.pdf Be sure to read this if you're thinking of working with THF.

HTH, -- Greg --

(edited to delete dead link)
 
Thanks Greg,This sounds like some pretty nasty stuff.Maybe I don't want to do this idea I had.
Bruce
 
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