So while flicking my CTS-20CP sprint (yes Blerv) it occurred to me that the feel of the movement of the ball against the steel just seemed too hard and smooth to be steel. Peering inside it looks like the ball detent is black. Is spyderco using silicon nitride, or some other ceramic, bearing balls for this now? If they are I'd be super super pleased and impressed. Just one more bit of evidence that the spyderco para2 is the best knife from the best company........
Consider how much surface area of the ball is touching the blade..there's very little friction happening there. Even if metal to metal friction happened it wouldnt take much lube at all to eliminate it.
SHARPEN IT LIKE YOU LOVE IT, USE IT LIKE YOU HATE IT
Yeah if you're getting grinding it means either you have a steel detent and its unlubricated, or you broke a ceramic ball and it'll slowly eat your blade tang....... not sure which is worse. If lubrication doesn't eliminate it you MIGHT want to either open it up or send it back to SFO for a good once over.
The ball bearing doesn't spin, but is hard and slides smoothly on the hard blade surface. I have found some liner locks to be too hard to open for my preference, and some have a hard spot right after you release the blade to close as the ball climbs the corner. I modify both areas of the blade to facilitate easier opening and closing.