The online community of knife collectors, A Knife Family Forged in Steel
Unless you are in a place where the normal laws of Physics do not apply, a framelock would be the strongest. Though invented by Chris Reeve (originally on the Sebenza) I think the folder closest to a fixed blade when deployed is the Rick Hinderer XM-24. It uses the identical mechanism to the smaller XM-18 (both the 3 and 3.5 inch blades) but it has a thicker 4" blade and is overall a beefier knife.
18 @ Left, 24 on Right
I agree with the Axis lock crowd. It is probably the best folder lock on the market. I have 4 Benchmades equipped with it(BM15020-1, BM581, BM5871 & BM111SH2O-YEL) and they never felt as if they would fail. Same for my Spyderco Manix2, even though it is not an "Axis-Lock", it is as close as you can get without having Les sue you.
I have Liner locks and frame locks also. My ZT350 & JYDII -CB have solid lock up, absolutely love them due to they are slimmer in the pocket than the Axis-lock knives of the same size. I only have 1 framelock knife and I don't use it for more than opening mail (BM Pinnacle Gold class), so I can't attest to the frame-lock strength.
I have 10 Paul Axial locking knives, bought 8 pieces out of the Prototype vault at Lone Wolf before they finalized the buyout with Benchmade. The other 2 are 1st production run editions. These are all safe Queens, but the lock up seems okay. Definitely not hard use except maybe the Protector, it is a stout knife.
I didn't think about the Triad lock, I too have a Spartan. It locks up so tight, it is sometimes hard to un-lock.
Matt Freeman said:
Another +1 for the TriAd lock. I own a CS Spartan and a custom version of the Espada made by Andrew Demko. One cost me $60 and the other was $680. Both are the tightest/strongest folders I have ever owned regardless of price.
Any quality knife with liner lock- lock back - frame lock - what ever - has always worked for me as long as I held the knife correctly. Cutting edge down.
I have to agree that the ZT 300 series has one of the best locking mechs I have encountered. Titanium framelock gives it great stability and you sure know when it snaps into locked position.