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Was there thread locker on it when removed?Tearing down a new MS251, I came across something new on the cylinder bolts.
The tips are "pointy, and the threads don't start right away...
Nothing controversial, just interesting.
View attachment 896594
It doesn’t cut them, it forms them. Basically mushes the metal around the threads and shank. Once they’re formed the screw works just like any other, it won’t recut new threads once they’re formedYou have to wonder how many times Stihl tested this design. See post #2. I suppose they assumed that every time the screw is used, it's going into a new cylinder and cutting new threads. That's a rather powerful assumption in my book.
That's good to know. Seems to me that forming is the same as cutting, but I hate to be picky. I have a feeling these will work out OK and I imagine they have been tested to high heaven. Nice to jaw with another 361 owner. It remains my favorite saw even if its carb does flood occasionally.It doesn’t cut them, it forms them. Basically mushes the metal around the threads and shank. Once they’re formed the screw works just like any other, it won’t recut new threads once they’re formed
Would they have to be put back in the same hole as removed from?
The big difference is that a cut thread is made by removing material. A formed thread doesn’t remove any material, it just moves it around, in this case the aluminum gets extruded toward the shank of the screw and fills the gap between the threadsThat's good to know. Seems to me that forming is the same as cutting, but I hate to be picky. I have a feeling these will work out OK and I imagine they have been tested to high heaven. Nice to jaw with another 361 owner. It remains my favorite saw even if its carb does flood occasionally.
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