I just bought one of those 3 stage pull through kitchen knife sharpeners, and it ruined my knives. Is it faulty?

Question

Is it something to do with my knives, like is the metal too brittle for this type of sharpener, or am I doing something wrong? It says on the instructions to only apply a little pressure, but I thought I was, and I can t see how else my technique could have been wrong. The knives weren t too bad to start with, just a few tiny little nicks, but as I sharpened them those tiny little nicks became huge gouges, up to 1mm deep! They are now completely ruined and the only way I think you could sharpen them up again would be if you hand an electric grinder and you were particularly skilled at using it. I would like to know it there could be something wrong with the sharpener, because if so, I would like to get my money back.

Edwena · Accepted Answer

Try the sharpener on some different knives.  You are going to have to buy some knives, so buy a couple of cheaper ones and see if they sharpen.  It is pretty unusual for a knife to get nicks, so my guess is it is the knife steel.  The problem could be that the steel was quenched and made hard, so hard a piece will break off.  Have you ever stuck this knife in the fire, got it really hot, then stuck in the water. That is the quenching process for making hard steel.  It also makes the steel brittle (notch).

STEVEN F · Answer

Your technique is defective.
EVERYONE that buys those sharpeners is CLUELESS about  how to sharpen knives.
Anyone that thinks they can visually measure 1mm is eve MORE clueless.

Nosehair · Answer

Unfortunately those pull through sharpeners are pretty brutal on knife edges. I would never use on on a high quality knife.

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I just bought one of those 3 stage pull through kitchen knife sharpeners, and it ruined my knives. Is it faulty?

3 Answers