Need help regarding sharpening my CQC-10. I may have screwed up the edge!!!

S

SeraphXT

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Sep 28, 2012
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Hi! I recently bought an Emerson CQC-10 and after using it for a week, I decided it could be sharper. (I shouldn't have even started sharpening it :grumpy:)
I used the Lansky clamp sharpening system. After using a marker to mark the edge and taking a few sweeps with the hone, it looked likr the 30 deg angle was the closest. After about 10 minutes of sharpening with the fine (600grit) hone, the edge had an almost mirror shine.
When I tried to cut paper or cardboard after cleaning up the blade, it couldnt cut properly anymore. I have no idea what to do now and I'am afraid of doing anymore in case I make it worse.

Does anyone here know what I did wrongly? And what should I do to remedy this. Besides the Lansky I also own a Spyderco Sharpmaker.

Thanks!!
 
Can you catch a burr with your thumbnail on the other side of the blade? If so, smooth that burr off of there with a few light strokes. Thats a place to start.
 
Look at the edge. What does it look like? Does the bevel extend cleanly to the apex of the edge with no burr? Or does it have flat spots dings and a burr?

Did you create a burr on the backside during sharpening? Did you hone the backside?

Takes more than a shiny surface to be sharp.
 
Ok I took a picture of the edge to let you guys see if I did anything wrongly. Hope it helps! Thanks! :D

053A35F8-DC97-4E49-B636-F406E1EAFB97-3433-00000344D0700CA5.jpg
 
I felt the back side of the blade and couldn't feel any burr, but I think I feel it on the front edge. Do I strop the edge?
 
whew, ok good thought you might of not realized it was a chisel grind, like someone said before try a few light strokes with the finest stone you have on the non sharpened side and see if that helps, if you have a strop, use the strop instead of a stone and do the same process i said above and see if that helps
 
Ok. Thank you! I'll try that.
BTW I asked a friend earlier he said I may have rounded the edge. What does that mean?
 
Im not sure what he means by rounding the edge unless he means you may of convexed it , I dunno man, I'm a novice sharpener myself if my sharpmaker can't handle it, I send them off , to be resharpened by a friend of mine who is an expert at sharpening, knifenut1013 knows his stuff too may wanna ask him, maybe somebody with more expierence than me can chime in I used to use the lanksy system but i did the same thing you just did to your emerson with a spyderco i had, I tossed the lanksy and got a spyderco sharpmaker with the diamond rods, and ultra fine stones and haven't used the lansky since. if you cant get it done , I can point you to a guy who will redo your edge for 1$ per inch plus return shipping and hes awesome. his turn around time is great too.
 
Rounding an edge is only going to happen with a strop so unless you stropped it neigh unto death...I wouldn't think so.

Rounding occurs when stropping on a compressible material like leather and as you drag the blade over it, usually with too much pressure, the stropping surface pops back up against the very edge of the edge and thus abrades the edge at a very obtuse angle.

So if that thing is a chisel grind and you did not work the flat side, you did not screw up the blade. You may have goofed up your edge but it will most certainly be retrievable.
 
Looks pretty good except the tip area looks to not be completely ground. Its blurry but you seem to have some light contrast from two different grind patterns.

Once you lightly grind the burr off the back you will need to go back to the front main bevel and de-burr as it will flip the burr to the front side. Using light pressure go back and forth until the burr is removed or small as possible.

If by the end of this your edge is not extremely sharp, mowing hair off the arm and making slivers of paper, then something else is wrong. If that happens to be the case then using a coarse hone to grind down the edge to assure a even single bevel plane would be my recommendation.
 
Thanks for the help everyone! I've done the said de-burring on the main and reverse bevel. The knife cuts cardboard well enough but it can't cut paper for nuts! It's cuts a little along the paper then the paper catches on the blade and tears.
 
Might be the way you try to slice paper. Remember that the chisel V grind favors the left side. My CQC-10 is extremely sharp, but doesn't cut paper as effortlessly as my Speedform II for example. Push-cutting though, it's hard to beat.
 
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