(9) Let me first try to explain what you are looking at in this picture starting from the left to the right. The first little gray thing is a small collet that fits into my Dremel. You will have to use whatever size collet that fits the size of the pivot pins that you are using. In my case it’s 3/32 inch. Next shown is a small brass tube. The tube is a 1/8 inch tube which has a 3/32 inch center. The tube fits over the shaft that’s seen to the right. Next is a collar that has a 3/32 inch center which also fits over the shaft. These collars are actually wheel collars used on remote controlled airplanes. You can find these at your local hobby shop, or you could make your own if you have a lathe. Then we come to the shaft. The shaft is made out of what ever size pin material you are using. The shaft has a small piece of 1/8 inch tube soldered to its end to keep everything from sliding off. You can see this piece best in the first picture. On this shaft are the washers and the other collar. (10) This picture shows all of the pieces placed on the shaft. The washers are between the collars, and as you can see, the washers are a little uneven at the edges. The collars will act as guides to even the washers up and to center the holes. (11) In this picture I have the shaft inserted as far into the Dremel as it will go, and the washers are ready to be spun against the grinder. The 1/8 inch tube stops the shaft from going farther into the Dremel and it keeps everything tight.
(12) I kind of like this picture because it’s an action shot. The Dremel is spinning the washers in the opposite direction of the grinder. (13) Now that I have finished spinning the washers, notice how they are all even and match the collars. The collars will eventually wear down, so it’s a good idea to have extra ones on hand. I have some old collars that I use when I want to make smaller washers. (14) The shaft is now apart, and I have my finished washers.
Using The Washers In A Folding Knife
To get the best performance out of the washers, you need to make the blade around .007 inches less than the spring in thickness. This will make the blade and washers about .001 wider than the spring when the knife is together. I also don’t use shims when putting the knife together if I’m using the washers. The blade will be a little bound up at first, but if you oil it and work it for a day or so, the blade will loosen up and the action will be great. I’ve been very satisfied since moving to this method.
I hope the tutorial was informative and enjoyable. Please email me if you have any questions or comments.