We have a massive amount of Edge Pro products so we figured it would be good to have a whole section on how to use the machine and what to use on it.
Thu Apr 25, 2013 11:36 am
Not sure if this belongs here, or in the general sharpening topic, but since I use edge pro, I put it here..
I'm having a hard time sharpening my Ryusen Blazen (SG2 powdered steel) knife to the 'desired level' of sharpness.
I use Shapton Glass stone, and tried 1k 2K and 4k. I can't get it to be really sharp (i.e. shave arm..).
I get a usable edge, but I can't manage to get it as sharp as I get a white 2 steel knife for example.
Not sure what I'm doing wrong , I haven't had this knife for long, do these SG2 knives require a particularly long time in each stage ?
Thu Apr 25, 2013 5:58 pm
The Blazen (SG2 I assume) will not take as keen an edge as white steel for starters.
Also ensure you create a burr full blade length.
Lightly finish with your last stone (raising it just a hair's breadth).
Ensure complete burr removal for that scary edge.
I have the Blazen petty (the wife's) and it gets real scary, shaving sharp.
Consider stopping at 2k for a good bite.
And do not go below 15 degrees per side, to prevent carbide fallout.
Thu Apr 25, 2013 10:54 pm
Thanks for the advice, I will try to do as you say. Why is stopping at 2k here better ?
I was trying to sharpen at the factory angle, which seems to be just about 15-16 degrees.
Fri Apr 26, 2013 5:15 am
I find that a well refined 2k edge provides a good balance between push cutting & slice cutting - a good all rounder.
You should easily be able to shave arm hairs at this grit - take your time - use very light strokes on the final stone.
Yep, the factory edge is thereabouts - don't go lower otherwise you might experience excessive chipping.
Fri May 10, 2013 6:58 pm
When you say you can't get it to shave my first thought is you are not grinding the edge properly. Are you getting a burr?
Like Rookie said, you should be able to get the knife screaming sharp with some toothiness on a mid grit stone like a 2K. If you are not getting it that sharp my guess is you are slightly behind the edge with the angle you are using.
Try using a magic marker to paint the edge so you know you are getting the angle right. Also, it really helps to use a magnifier so you can see what you're doing.
Fri May 10, 2013 7:04 pm
.....listen to da man!
Sun May 19, 2013 3:06 pm
Mark - you were spot on, a really careful look with the magnifier revealed the angle was a bit off, the knife put up some resistance, but eventually I beat it into submission... It's now pretty sharp, at least by my standards.. It required however quite a few strokes on each side, is this metal (SG2) considered hard to sharpen ?
Another question : is the Idahone fine ceramic rod good to use with this type of metal ?
Sun May 19, 2013 4:21 pm
SGS-2 requires slightly more effort, but worth it - just do not go below 15 degrees per side, then carbide fallout will occur, resulting in a "chipping" effect.
The Idahone fine ceramic hone will work just fine to straighten the edge - just ensure to maintain the same angle.....light, very light strokes.
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