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Re: Jnat recommendation for knife finisher

Mon Feb 17, 2014 4:04 pm

I only got to play with 1 in 19C27 so far (waiting on the Goko's :) ) and that was here for a major repair. I didn't mean to indicate that it doesn't do well with a J Nat, just that the stones perform differently on different steels/HT/etc. I have found AS LOVES J nat stones for a finisher and R2 is another powder steel, so very fine grain structure as well like AS and carbon steels. I know AEB-L and G3 are very fine grained steels, not sure about the grain size on 19C27; I though I read somewhere a while ago that the grain was a bit coarser with larger carbides in it, but that could have been another steel they were referring to. Of course, the heat treating temps, cycles, quench cycle, etc play a BIG role in how the steel performs, grain/carbide size, etc. I think 154-CM has much larger grain size than the CPM154 powder steel, IIRC I think it was D2 that has some big carbides in it as well?

I was trying to stress the fact that some stones tend to "like" different knives/steels. Many of the finer grained steels seem to do better with higher finishes, where steels with bigger grains/carbides may do better with coarser steels? Something about carbide fall out or something like that? This is going back several years, so I may not be fully correct; it was something to do with sharpening D2 IIRC.

Re: Jnat recommendation for knife finisher

Mon Feb 17, 2014 6:16 pm

Thanks Tim. I'm starting to become a bit of a natural enthusiast, so happy to have a better reason to get several in the same grit range.

Re: Jnat recommendation for knife finisher

Mon Feb 17, 2014 6:46 pm

LOL, feed the addiction!! This is why the J Nats are a dark hole to jump down, each stone, even 2 identical looking ones, act differently!

Re: Jnat recommendation for knife finisher

Mon Feb 17, 2014 9:29 pm

Maybe I should slowly back away from the edge of the hole . Lol!

Re: Jnat recommendation for knife finisher

Mon Feb 17, 2014 11:42 pm

Hmmm. This post made me get out the Ozuka Asagi and play with it again, this time with the DMT 1200 slurry stone. Wow. Sick edge off that sucker now :) Tried it on my Yamashin Funayuki in White #1 :) Normally don't need an edge that polished, but fun to play with :) It's a hard, scratchy feeling stone, but really refines the edge well. Slurry stone made a big difference, the other Nagura's don't work as well because the stone is so hard.

Re: Jnat recommendation for knife finisher

Tue Feb 18, 2014 1:22 am

Talk to Ken Scwhartz. He'll set you up with good stones at reasonable prices. But be warned, he'll talk a lot. He knows his stuff and his passionate about it.

Re: Jnat recommendation for knife finisher

Tue Feb 18, 2014 2:56 am

Umberto wrote:Talk to Ken Scwhartz. He'll set you up with good stones at reasonable prices. But be warned, he'll talk a lot. He knows his stuff and his passionate about it.


So I've heard :) I was saving Ken for last lol!

Chris

Re: Jnat recommendation for knife finisher

Wed Feb 19, 2014 12:02 am

taz575 wrote:Yeah, I rarely use mine. Most of my nats are between level 3 and 4 hardness wise and 8-10K or so grit wise.



Hey Tim are you thinking of getting rid of any of those J Nat finishers :D

Re: Jnat recommendation for knife finisher

Wed Feb 19, 2014 4:02 am

1 of the Takashima's may be up for sale, but I haven't fully decided yet.

Re: Jnat recommendation for knife finisher

Wed Feb 19, 2014 7:38 am

Chris, contact me anytime. My PM box fills up here all the time so contact me at 209 612 2790 or ksskss@earthlink.net .

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Ken
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