Spine Whack Test - deforms lock?

[DaveH]

I received a used knife today, a spyderco toplock. Careful examination of the notch at the rear of the blade shows a small amount a deformation, the result perhaps of spine whacks? Direction of the deformation is towards the back of the knife.

Very slight vertical play, no signs of any propensity to unlock, and a slight amount of side play.

I'm happy with the knife, but was curious if anyone has seen this before.

Dave

 

[Walt Welch]

More likely cause: flipping.

 

[misque]

That sounds about right Walt.
To cause that kind of deformation via Spine Whack Test would not be possible I would think.

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The individualist without strategy who takes opponents lightly will inevitably become the captive of others.
Sun Tzu

[This message has been edited by misque (edited 07-12-2000).]

 

[Matt Shade]

If your talking about a midlock or lockback style lock, then I agree with walt. Its probably caused by hard inertia openings. Normal thumb flicks shouldn't cause that type of damage either. If they do, the locking bar of the knife is to soft. It couldn't have been caused by spine whacks because they would put stress on the tooth on the end of the locking bar that engages the tang of the blade and holds it open.If that were damaged there would be blade play but it would be downward in the direction the blade moves when you close it.

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It'll feel better when it stops hurting.