Strider SNG lock bar question! (super interesting!!!)

Joe58 said:
rpnp - thank you for your reply. Interesting. Your comment about Sal though begs the question, why the liner lock & frame lock models then? If he feels his lock back is the way to go, why stray from it? Consumer demand I would guess. And I'm sure his liner & frame locks are "strong enough" so to speak. Just as CRK's are too, as are the others I would think. If you stay with well established makers and quality custom makers. Otherwise a bad rep spreads like crazy now days.
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You know, I figure Spyderco still makes liner and frame locks because people want them. Remember that they also produce all kinds of other locks, including through Seki which almost exclusively uses the lockback design.

Also, here's where I refer to the recent BladeHQ video about destructive testing of locks, where Spyderco and Kershaw knives survived the test despite being the inherently less stable liner and frame locks.
 
The lock geometry is correct. If the whole surface mated with the tang, you would get lock rock where the locking contact rocked back and forth over the surface. Bob Terzuola pretty much wrote the book on tactical liner lock design and goes into some depth in his chapter on lock geometry as to why the locking interface should be at a small point as distal from the pivot as possible. It's somewhat counterintuitive but accepted among designers that only that small portion should make contact.
 
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