I have to share this because I finally managed to completely get rid of the lock stick in my PM2 Magnacut.
From the very beginning there was lock stick. Rotating the stop pin didn’t help at all. Loosening the stop pin screws and the pivot helped a little, but after a stronger flick it would come back again, although slightly less.
I disassembled the knife. I went over the liner lock face with a diamond file, polished it to a mirror finish on the side that contacts the stop pin and also on the side where it engages the blade. I polished the stop pin as well, cleaned everything, rounded and lightly polished the area on the blade where the lock engages. Full of hope, I put everything back together… and what happened?
Nothing. The lock stick was still there.
I put the knife aside thinking I might come back to it later — the lock stick was so strong that it actually left a red dent in my thumb from the lock bar.
But a few hours later I thought that maybe the liner lock itself was slightly bent in a way that caused it to wedge between the blade and the stop pin.
I took the knife apart again, but the liner and the lock bar looked almost perfectly straight.
I decided to try bending it very slightly to one side — and that was the bullseye. The lock stick disappeared and the lock now disengages smoothly with zero resistance.
In my opinion the lock bar was sitting too perpendicular to the blade tang (which, as we know, is angled), and that might have been the reason it was wedging after opening and causing the lock stick.
In the photos you can clearly see what I mean and the direction I bent it. If anyone wants to try this, it’s better to bend the lock bar by a very small amount and check gradually whether the lock stick is gone.
Honestly, I didn’t expect this to work. There’s no lock rock, everything is solid, and the blade doesn’t close even when I tap knife on spine with hard surface.
by Few-Conversation7528
