Hello to all. Here is a build up of a knife that I really like to build. It is called a eureka cattle knife. I bought a knife like this one on Ebay and took it apart for a pattern. The original knife was made by Henry Sears and Sons. It was a whittler with three independent springs and I made it to have only two springs and therefore make it slimer than the original and also chaged the blade combination. Maybe one day I will make it in a split back whittler configuration. Below is an image of the original knife.
Here is the first photo of the knife build. Here are the basic parts just profiled to shape.
Here are the parts now surface ground. The springs are .008'' thicker than the blades as this knife will be having no blade relives and have washers.
Now we have the blades ground. I rough grind them using 120 Northern Blaze belts and then I jump to a Hermes J Flex 220 and leave the cutting edge at about .035'' thinck.
Here I'm cutting the long nail pull with a slitting saw. This is a slow process to keep your saw cutting good and make a nice clean cut.
Now I'm cutting the cresent style nail nick using a fly cutter at low rpm and using cutting oil. This is also a slow process but worth the wait to get a nice clean nail nick.
Here are the parts now with the name stamped ready for heat treating.
Now we have the liners cut out and surfaced ground ready to be machined. They are made out of 410 stainless steel in 3/16'' stock.
Here I'm maching the handle material pocket on the liners.
The parts are now harden and can still be moved some so now is the time to check for propper blade clerance. Here I have them claped to a harden template of the handle that is surface ground and flat to check for clerance between the blades. After checking ok they are ready for the tempering cycle.
Here are all of the parts after some labor intensive massaging of the parts and they have now started to work against each other in harmony.
Now a picture of me back drilling the handle material.
Here is the basic setup that I use to pin the handle pins. I use domed head stainless steel nails that I polished before pinning them. This is something that Tony Bose shared with me.
Finally we have the knife put togher for the last time and ready to be pinned.
There might be as many as a 1000 steps if not more in building a knife like this but this are just to give you guys a glimps into what and how I do things to make a knife. I have been in an endvor to put a book togher on how I make lockback knives and have realized that many of the steps after being repeated so many times become second nature to most of us that make knives on a consitance basis. Knife making is my passion and I'm so fortunate to do it for a living. This used to be my hobby and I had a good paying job as a diesel mechanic but when the economy fell in 2008 I was laid off from work which turned out to be the best thing that could have happed to me. It was really hard in many ways at first for me and at times I just wanted to go get what some call a real job which would have been possible in the economy of that time but I had 100% support from my wife to make the jump to be a full time maker and the help of all those that helped me along the way and that still help me but I mainly give GOD the glory for working things out for me and giving me the skills to make what We all love which are TRADITIONAL KNIVES.
And now the finished knife.