Help sharpening an Emerson CQC 7k and a Mora Classic No.2

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Apr 7, 2013
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Hey Folks,

While I am no newbie at sharpening, I am still far from an expert at the craft. I have no problem putting edges on any of my kitchen knives, but I've been struggling with folding knives and certain fixed blades. There are two blades that I am struggling with as of late, a Mora Classic No.2 (Scandi Grind) in Carbon and an Emerson CQC-7 folding knife.

Here is a list of my stones that I use:
  • Gesshin 400
  • Gesshin 2k
  • Gesshin 4k
  • Felt and Leather Strop


Starting with the Mora Classic No. 2
1. How is it possible to put a perfect finish on the bevels of a Scandi grind, which is basically a single bevel on each side. The scratch pattern I get is insane and ugly. The knife gets shaving sharp and at the end of the day that is all that is important, but I would like to continue my development in sharpening. I feel the next step is an even finish along the blade road, how do you guys manage it? Do I need to bust out sand paper and a flat stick or finger stones? Since there is only one bevel on each side, how do I prevent damaging the edge with the sand paper/finger stones after the knife has been sharpened?

Here's a couple of pics, which will show you the uneven scratch patterns I am getting. Keep in mind I'm not talking about the flats, just the blade road on the bevel.
ANmSEG.jpg

fjHO5G.jpg


2. Why is it that I can never really feel where the burr is on my Mora when I am sharpening. When I am sharpening, I have a hard time detecting a burr and I typically feel it on both side of the blade, is this a Scandi thing or am I missing something obvious? I use sharpie to make sure I am hitting the entire bevel and use that as a guide when sharpening. This is only the second time I've sharpened it, but I had an issue just recently with what I think was the edge rolling. I first used the knife up in Michigan for 3 days straight batoning large amounts of wood for our fires by the lake along with general bushcraft-esque duties and the edge held up with no damage. I sharpened it when I got home and yesterday was the first day that I really used it hard and I battened one small 1' long slab of 2x4 into some kindling and I noticed then that the edge rolled. Was this because the 2x4 is hard or could this have been a wire edge?

I sharpened it again to remove the damage to the edge and she's shaving sharp again, even though I could never really feel the burr properly like I can with my kitchen knives. I put just the slightest micro bevel on it as one might ever so gently on a yanagiba. I will test it out tomorrow on 2x4's to see if that helps out.

Emerson CQC-7 Tanto in 154CM
1. A friend of mine at work after seeing a few knives that I had sharpened for our other coworkers handed me his Emerson to sharpen. There was no edge damage to the knife so I started with my Gesshin 2k stone, which cuts plenty fast and I could not raise a burr to save my life. I checked with sharpie and was astounded to see just how large of an angle I had to use to hit the edge. Is my failure to raise a burr a product of the steel they use or am I just failing at basic sharpening. Should I have started with the 400 grit when dealing with 154CM?

Lastly, free hand sharpening on small folding knives/fixed blades is incredibly more difficult to me than a 10" gyuto. I would have thought differently, but I guess it is because the majority of my sharpening happens on chef style knives.

Cheers and thanks in advance for any help,

Pete
 
Am I asking the wrong questions, or am I too long winded with my posts, just curious?

The Emerson has a chisel grind, will be the entire inclusive angle that will have to be held on one side, and as close to dead flat on the other side. Will feel awkward the first time you do one, use a Sharpie till you're confident. Remove no more off the flat side than absolutely necessary to remove the burr.

The Mora will be helped if you can work from the shoulder out to the apex when grinding. It also helps to apply a very slight roll as you go. The bevel will almost always have some amount of convex and that is what is causing the hatching you see, so you can make it perfectly flat, or soften it a bit by blending the scratch pattern. Is very common when doing broad scandi and full convex by hand on hard abrasive surfaces, aggravated by any shift in rake path across the stone - edge to grinding direction. The slightest of roll will blend this in. You can also use some sort of strop, even a sheet of paper with mud from your last finishing stone will probably do fine wrapped around one of your other stones. Using an abrasive on your leather strop will visually smooth it out also.

With a great deal of care, one can blend the hatching on convex and scandi right off the stone. My level best will finish off the stone with a finish uniform enough that any remaining hatching can be blended in by simply stropping on plain paper. Is a lot easier to use some abrasive on a sheet of paper. If used wet, go light. If you let it dry out you can use it on a dry stone with a bit more pressure, but still light overall.

It might have rolled because you made it too acute. A slight convex or microbevel tends to toughen up a scandi - I use a slight convex. If the inclusive is much below 24* it will start to loose durability (but will be a better carver if used carefully).
 
Thank you very much, your answers are very helpful. I will definitely try the stone slurry to get a better finish on the blade road. With the rolled edge, I followed Mora's original angle so it should be close to 25*. I will report back with how she performs with the newly added micro bevel.
 
Just finished touching my 2/0 up a little bit and thought I'd share. I used dmt bench stones coarse (325), fine (600), and extra fine (1200), then king 1k, king 6k, and Chinese 12k. Then stropped with white compound, chromium oxide and then bare leather. Final rub down with some mothers mag and aluminum polish with a soft cotton cloth and microfiber to get all the residue off. Finished product will get you a pretty good mirror in the right light.


It's not perfect but I think what HeavyHanded says will render and even clearer finish. I tried what he said tonight and noticed I got better results.
 
Thank you very much, your answers are very helpful. I will definitely try the stone slurry to get a better finish on the blade road. With the rolled edge, I followed Mora's original angle so it should be close to 25*. I will report back with how she performs with the newly added micro bevel.

Give it a go. All my Moras have come with a slight convex and a very slight hollow grind within that convex. Depending on what spot you choose to start from, the edge can get down to 22* up to approx 25-26* inclusive. Anything much more broad than that and performance will drop off, is why I always recommend (for all edge grinds) to start at the shoulder and work out. Very easy to make an edge more broad, can be a bear to make one more acute, especially scandi, full convex.
 
Just finished touching my 2/0 up a little bit and thought I'd share. I used dmt bench stones coarse (325), fine (600), and extra fine (1200), then king 1k, king 6k, and Chinese 12k. Then stropped with white compound, chromium oxide and then bare leather. Final rub down with some mothers mag and aluminum polish with a soft cotton cloth and microfiber to get all the residue off. Finished product will get you a pretty good mirror in the right light.


It's not perfect but I think what HeavyHanded says will render and even clearer finish. I tried what he said tonight and noticed I got better results.

She looks beautiful, nice work!
 
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