DMT Aligner - X Course & XX Course stones

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Nov 5, 2009
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So my 2 new DMT Aligner stones arrived today. I have tried them out on one of my knives and thought I'd share my view for those that haven't tried these yet.

I now have 7 hones and a rod - the Aligner cost $46 with 4 hones (Coarse, Fine, E Fine & a bonus EE Fine) and a rod, which I think is pretty good value. I see that now the one I bought comes with a serrated sharpener instead of the EE Fine stone.
So I now have: XX Coarse, X Coarse, Coarse, Fine, E Fine, EE Fine & a convex stone for recurve blades as well as the diamond conical rod for serration sharpening.


My opinion of the X Coarse & XX Coarse for sharpening:
Don't do it! These are NOT sharpening stones!

My opinion of the X Coarse & XX Coarse for reprofiling the bevel:
These are the way to go! Seriously - you can grind off the metal with these stones sooooooo fast - bevel reground in a couple of minutes! Also for a serious ding or chip repair - these are the stones you would look to for fixing your blade.

There is no way that these stones are needed to sharpen a blade - they grind off the metal many times faster than the coarse stone and you don't need that to sharpen a blade. But to reprofile the bevel where you need to remove a decent bit of steel - what takes 10 minutes with the coarse stone would take only a couple of minutes with the X Coarse stone! I don't know that I really need the XX Coarse - but when you are paying $35 in shipping you tend to order what you think you might need rather than put another order in later if you decide you do want it.

The X Coarse stone should be enough to reprofile most knives and it can get that bevel down to the angle you want pretty fast. I think that the metal removal between the Coarse & X Coarse is quite a big jump - much more than the 325 mesh vs 220 would suggest, but maybe my coarse stone is more broken in than I realise because the 120 mesh of the XX Coarse stone doesn't seem all THAT much more coarse than the 220 mesh of the X Coarse stone.
 
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Gadget, I've always felt like Norton's diamond stone in 220 grit (x-coarse) was coarse enough to rebevel anything . Thanks, I agree . DM
 
Coarse*

I use XC to get chips out, and then I finish with EF. But 99% of the time I just do touch-ups with my EF. I would not use XXC or XC as part of my regular sharpening/maintenance process.
 
Coarse*

I use XC to get chips out, and then I finish with EF. But 99% of the time I just do touch-ups with my EF. I would not use XXC or XC as part of my regular sharpening/maintenance process.

Oops - spelling part of my brain must have overheated (it is a very hot day today).

Hopefully most people that buy diamond stones realise that they only need enough roughness to grind a very small amount of material to get the knife sharp for the regular sharpening. Actually for an edge in good condition I usually just strop it until it is 'shaving sharp' and just save my aligner for when it is really needed.
 
The way I see it, any given knife should only have to see an XX or XC DMT once in life, barring some major carnage of the edge doing something you probably shouldn't have. Any time I have to do minor edge repair (rolled/lightly chipped) its always on the EF or at the worst the F. All the less scratches to have to polish back out!
 
Your opinion will change once they break-in, I finally got my coarse DMT the other day and in its first use I realized what a new stone is like again. It felt just as coarse as my XC yet left a finer scratch pattern, the surface of a fresh stone IMO feels awful compared to one that's broke-in.

XC is a low as I go unless the edge needs a reprofile or has damage. The XXC is a beast of a stone too, it sounds like your draging a shovel down the side walk. When you do use the XXC make sure you spend the time on the XC to get out the scratches, they run deep.
 
I would have given you credit but I forget the originator :)
 
I have used the DMT Dual-Sided Diafold w- Diamond Course/Fine for over a year now, and it has been better than any other sharpening tool I have tried.
---My only problem is that the 4 by 1 inch Diafold took forever to convex my Busse NMSFNO (.22 - .25 thick)
*I have a sweet NMFBM (.22 - .25 thick) arriving tomorrow, and I know I am going to convex it into a chopping demon as well, so I need a larger sharpening stone to get the job done.
***Which stone / system is the most effective and practical for such tasks???

-Hunter
 
^ sandpaper/emery cloth on a soft backing.
 
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