ZDP 189 edge retention

Joined
Jun 7, 2002
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the issue that won't go away. if one looks at old posts in BF, beginning from its introduction in 2006 or earlier, one sees a progression in opinion from being the best knife steel around to being a category 3 steel. my experience with my zdp endura are:

1. it needs to be re-profiled only once (so far.) i'm assuming this to be corollary to what a lot of owners say: that zdp 189 doesn't need that much sharpening but,
2. i probably need to touch it up once every two weeks. and that's from light to near-zero use. two weeks is how long the hair-splitting edge lasts when i do nothing but, well, split hair.
3. it loses that hair-splitting ability right after i slice cuts from a leg of ham, or convert a pound of sirloin into beef stroganoff strips.
4. in touching up on a treated strop, it takes twice the number of reps compared with a vg-10 or an s30v. same with finishing on untreated leather. one thing i learned about sharpening zdp is one needs to increase the number of reps, not the amount of pressure.

so that's how my endura has been performing for more than a year now. it's easily my sharpest knife and it seems to hold its edge longer than both the vg-10 and the s30v. i don't know how much better or worse it performs with other owners. note, i'm not really that good a sharpener. i free hand using just three grits and finish on a glass slab and treated leather. my sharpening angle tends to be shallower on the right side (the one that is sharpened with the edge towards you.) I don't produce nor do i feel burrs. i might be creating micro-burrs or wire edges as i notice residual scratches right at the edge. but i do manage a twice/thrice split of hair.

any thoughts?
 
Assuming manufacturers take advantage of it's hardness potential (high RC), I'll just emphasize going very light with pressure when honing. Especially if the edge is thin. I say this, because I actually managed to break the tip off a ZDP Leek that I'd just re-bevelled to very thin, and I did it while STROPPING on a hard backing. Prior to doing that, I was excited at how it was cutting, but couldn't resist trying to 'tweak' just a little more out of the edge on my glass-backed strop (thin cardboard w/compound on top). Felt exactly like a freshly-sharpened pencil snapping the tip, when it went. So now, I get to contemplate re-grinding the tip on the blade, to make it pointy again. It was, for a very short while, the sharpest, pointiest, piercin'est tip I'd ever seen on any of my knives; but not anymore. :grumpy:

I've no doubt this stuff will hold an edge. But, it's definitely more brittle than anything else I've used. I have mixed feelings about how useful this steel would be for me, if I'm constantly worried about chipping it.


David
 
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