Sharpening D-2

Ben Dover said:
Now that I have my belt sander, I am strongly considering thinning it to a 10 degree per side backbevel, and using a 15 degree microbevel. ;)
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I am testing on some 5/8" manilla with a 10/15 edge on D2 and CPM D2 with no issues at all. I haven't tried them on tougher stuff yet, but I don't think you will have any problems unless you are cutting metals or really tough stuff. If it does microchip you can always go more obtuse with the microbevel.

Mike
 
Ben Dover said:
Is it worth the work?
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Yes, assuming you are not cutting metals/bone, I would flat to the primary and reduce the edge to 0.005". This will take awhile, I did it on a Mel Sorg D2 blade which was already very thin and it was many session of me grinding until I was bored, but I don't think I was using proper belts at the time - 80 AO or so. I ran that blade at about ~5 or so at the very edge and it would slice ropes and such almost forever. It did microchip very readily but that just enhanced the slicing aggression giving a micro-serrated effect. I would leave it with the 80 grit finish. It looked interesting under magnification, the micro-serrations themselves were micro-serrated. It was an insane slicing machine.

-Cliff
 
matt321 said:
Keith,
What method do you use to rebevil such that you can distinguish 12-13 degrees versus 10-15 degrees?
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When I say "12-13" I mean the secondary bevel done on an Edge Pro set between the 10 and 15 degree marks. The micro-bevel is at 15 done with a Sharpmaker.
 
Thanks Keith. I suspected you must have been using an EdgePro to be that specific about the angle. You must like the Sharpmaker better for the micro-bevel, or you would just do it with the EdgePro?
 
D2 usually has fairly large carbides and these can be ripped out easily with too much pressure. Too much pressure is easy because D2 is wear resistant and sharpens slowly.
I recommend diamond hones because they cut with little pressure.
I also recommend a very high degree of polish on the finished edge (I use a paper wheel for this) so that the carbides are supported rather than sitting out on the 'points' of the micro-serrations.
Greg
 
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