sharpening system

J

Jared Stenoien

Joined
Dec 4, 2005
Messages
1,025
I'm looking for a system to reprofile S90v at Rc ~60 to about 7 degrees inclusive at the tip of the convex grind, this is a small knife that will only be used for very delicate tasks, i made it mainly to replace an exacto knife. unfortunately my convex bevels leave something to be desired as of evenness.
 
I think the Edge Pro Proffesional model will serve well, It can go as low as 6º and works great for reprofiling.
 
I have not personally used the edge pro system, but I believe it uses stones, I have tried several systems that are out there and have not ben at all happy with any of them. The only thing I have found that works fast and does a good job on steels such as S90 is DMT diamonds. I have full assortment of their stones, yes they are espensive but worth every penny. I like the Duo Bench stones (2 grits on the same stone). If I could only have one stone it would be the 8 inch 600/325 however the 1200G is a great addition, followed up with a ridged leather strop you can get a very sharp edge quickly. Learn to sharpen with bench stones and you can be much more versital. You will be suprized how easy it is with diamonds. Stay away POLYCRYSTALLINE Diamond systems, you will not be happy with them.
http://www.dmtsharp.com/
http://www.knifecenter.com/knifecenter/dmt/index.html
http://www1.mscdirect.com/CGI/NNPDF...936824&PMITEM=05126594&PMCTLG=00&PMT4TP=*LTIP
Leon Pugh
 
That depends. There are several types of polycrystalline diamonds with different fracture characteristics, and some are tougher than monocrystalline. As for diamond plates, what is most important is how they are bonded. Cheap plates of either type will shed their diamonds in no time (Norton, Eze-Lap, 3M, and DMT all offer good diamond products... the others are chancy). There are also a couple of good diamond waterstones (ceramic rather than metal plates)... King makes one of the best rated ones.
 
For an edge that acute, I would also recommend the Edge Pro if you're willing to spend the money. It's worth it, I've never regretted purchasing mine. You can get diamond stones for it, which I would recommend for setting the bevel, then the waterstones it comes with should work very well for polishing the edge.
 
The markings on the Edge Pro are per side. You can however, elevate the knife above the blade table, for example on a block of wood, which would allow you to go to almost 0 deg. per side. You can do that with the Apex model as well.

If you're doing just one knife that's convex ground though, I'm not sure you'd be better off by maintaining it on a piece of leather charged with a compound, and if it gets too dull, laying a piece of fine grit sandpaper on top of it to touch it back up.

cbw
 
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