Liner lock and frame lock press fit stop pin?

By the time you finish that folder that stop pin will be loose. I wouldn't expect that to be a problem. That is unless you can do all your fitting in the first try. I use back bars. They will avoid any sort of problem in this area. Of course this may mean a different pattern and hard patterns become far more important. Frank
 
There are many ways to install a stop pin:
• Slip fit in both frames/liners
• Press fit in one frame/liner, slip fit in the other frame/liner
• Press fit in both frame/liner
• Press fit in blade

There are a few reasons a stop pin wears. Some solutions are:
1) Increase the area where the blade or frame and stop pin contact i.e., have the stop pin fit to a curved surface rather than flat.
2) Use a harder stop pin.
3) Use a larger diameter stop pin.

I've noticed more knifemakers using the floating stop pin that is pressed into the blade. The pin rotates as part of the blade around the pivot as the blade opens. Some knifemakers use a smaller diameter (.0938") stop pin to be the weak link in the lock. When the pin breaks the knife is locked open. It is easier for the knifemaker to press a new pin in the blade than replace a frame/liner or blade.

Stop pins are being used in other ways. I just received a Zero Tolerance folder where the function of the internal stop pin is to keep the closed blade from hitting the stand-offs. When the blade is open the thumb studs are the stop pin.

Chuck
 
I've always just put the stop pins all the way through the liners in a reamed-to-fit hole. The scales hold it in place, and I've never seen a drawback to doing it that way.
 
Chuck, try breaking, shearing a 3/32 stop pin in a 1/8" space between two liners. You will have that folder totally destroyed. Yes, I have run a few tests to see just what happens and what has to happen to create problems in this area. I didn't find that hardened stop pins solved or created much in problems. There is a good surface area in the holes drilled in the liners but the liners are titanium with a low hardness rating. No, as I did say I use them only very seldom. Frank
 
I press fit one side and slip fit the other on my Framelocks. Use a reamer that is roughly .001" over for the slip fit and roughly .001" under for the press fit. The knife will be easy to take apart yet the stop pin will stay solid.
 
Hi Daniel. Sounds like a method that works well unless you need accessibility to the tight side. Frank
 
Try buying 2 reamers. Start with one that is .001 undersize and if your pin doesn't fit go to the proper size reamer. That's how i do it for stop pins and pivot pins.
 
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