A few days ago I bought a lot (15pcs) of old "retired" 91mm models going from a Spartan to a Handyman. I wanted to start a spare parts kit and it's always easy to have some spare parts at hand. I tought it would be the perfect time to make some pictures to show you how to disassemble a 91mm knife without destroying the tools, spacers or scales. It takes a bit of practice, but once you've done a few, it goes faster and faster. I want to build a custom 91mm but still need to buy the rivets. Disassembling gives you the chance to see how effective, yet simple this design actually is. Good luck! Questions? Try the reply feature below or my mail address email@example.com
Here's the lucky bastard! Take out the tweezers and toothpick and leave it a few hours in a small bowl with soap and water. Take out of the water, and start prying the damn thing...
You can use another knife or something thin enough to get between the narrow space next to the scales. If you wiggle it enough you'll hear a "pop" and the scale comes off fairly easy.
The rivets now become visible and these are the ones you're gonna cut off afterwards.
Once both scales are removed, you need to clamp the knife, preferably in a vice to make a clean cut on the rivets.
I use a Dremel with a small cutting blade attached. This works very accurate and leaves nearly no damage on the outer spacer.
Try to cut sideways. Pretend to make a flathead screw and when you reach the spacer, the rivet head pops of.
Clean the remaining rivet and make sure the spacer comes loose easy... Repeat this with the other two large rivets. The smaller rivet in the middle needs a bit of grinding till you reach the spacer. This one doesn't have the small ring on top.
Now, try to make the same move you did with the scales. The outer spacer needs to come loose now and the first tools show up.
The first tool to disassemble is the corkscrew. After the corkscrew, the backspring will come loose and the two blades will follow instantly.
Right now, you'll have a piece of the rivets sticking out. Just enough to hit it with a hammer. Use something with a hole in it,under the knife, to protect the other spacer when you hit the knife. I use a watch-tool.
Use a plier to pull out the rivets, one by one. Do this without damaging the spacers.
Et voila.... The knife falls apart!
This is the result after 15 times this tutorial... ;)