slav
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Katsujin No Ken
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Post by slav on Dec 23, 2008 2:12:02 GMT
Sam, photos are fine.
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Post by Tom K. (ianflaer) on Dec 23, 2008 5:06:05 GMT
on the secondary bevel: usually they are easy to see but not always. basically your blade should slope evenly from the center ridge or shinogi (on a katana) or the edge of the fuller or bohi to the cutting edge without any sudden angles or lines. if there's a corner or ridge anywhere between where your blade starts sloping to the adge and the edge itself then you have a secondary bevel. think of a cheap kitchen knife, they almost alway have a secondary bevel. sometimes you have to hold the blade up to a light and look for a reflection to find a secondary bevel. if you can see a shiny line all by itself near the cutting edge, there it is. hope this makes sense.
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Deleted
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Post by Deleted on Dec 23, 2008 5:30:36 GMT
I wish you guys could see and try a slack belt on a grinder, bring a katana up to a 1500 grit beltconvexed to the edge, whew that is sharp. Sharpening a convex edge this way is very simple and easy to get the hang of and can be done on a cheap grinder like a HF 1X30.
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Post by ShooterMike on Dec 23, 2008 16:23:53 GMT
Sam, I've been really tempted to buy a good slack belt grinder and a wide assortment of belts. But I know the learning curve will be steep for me. And I will ruin a number of blades before I get it down. Any suggestions?
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Deleted
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Post by Deleted on Dec 23, 2008 17:16:56 GMT
Sam, I've been really tempted to buy a good slack belt grinder and a wide assortment of belts. But I know the learning curve will be steep for me. And I will ruin a number of blades before I get it down. Any suggestions? If you're serious...buy the grinder, and pick up a bunch of mild steel in 1"-2" widths, by 3/16"-1/4". Practice MAKING the bevels to begin with, then bring them down to an edge...then when it comes time to sharpen your own blades...you'll have the motions down pat =). Cris
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Post by ShooterMike on Dec 23, 2008 17:40:54 GMT
I've kinda been shopping around. But I can't find any place to buy the finer grit belts. Suggestions on where to shop? Online if possible.
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SlayerofDarkness
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"Always give everyone the benefit of the doubt."
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Post by SlayerofDarkness on Dec 28, 2008 2:04:10 GMT
Hey guys! I got the Windlass Vernuiel for Christmas, and, man does it cut! So I'm back in the game, and no one can stop me! Muahahahahahahahahahaha... hahahaha.... hahah... ha... whoa.
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Deleted
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Post by Deleted on Dec 31, 2008 0:07:57 GMT
I seen a question about this earlier. I did a quick MS Paint on it for reference for those interested.
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Deleted
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Post by Deleted on Dec 31, 2008 1:57:46 GMT
Odingaard. hollowground has a concave.
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Deleted
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Post by Deleted on Dec 31, 2008 2:22:58 GMT
Odingaard. hollowground has a concave. What I think Bishop means by this is that there isn't the leaf type diamond extension right before the 30* edge. The two curves come down to almost perpindicular to the cross section of the blade...with a small space between, which then goes into the triangular edge bevels. This is my understanding of it anyhow =). Cris
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Post by mythosequidae on Dec 31, 2008 2:31:43 GMT
I've kinda been shopping around. But I can't find any place to buy the finer grit belts. Suggestions on where to shop? Online if possible. Very difficult to locate. Apparently 3M has some sort of policy that does not allow vendors to cover their full product line. I learned this on a knife forum. This fellow can help you. You can also take advantage of the CAD-USD exchange rate. Look in the sharpening section. There are tons of other goodies to entertain you as well.......... www.chippingaway.com/WoodCarving/
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Deleted
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Post by Deleted on Dec 31, 2008 3:09:46 GMT
Bleh...I was working with MS Paint, my computer drawing skills suck, and I overexaggrated to get the point across. I could only really show that there was a concave before the edge and it came out diamond lookin'. Sorry for any confusion, but I know what you mean about how it looks in the above rendition. I'll do it this way: This is an example of a hollow-ground ricasso on my DT5140 -
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Deleted
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Post by Deleted on Dec 31, 2008 4:36:15 GMT
not the subject matter but the image, that's what hollowground is, both sides of the blade are ground like this. In knives it provides a superb edge but re profiling them is a pain in the buttocks. It's just your MSpaint mockup picture isn't correct :\ Unless I'm looking at it wrong? EDIT here's a better example
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Deleted
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Post by Deleted on Dec 31, 2008 5:12:22 GMT
That's closer Bishop...but often there is still another secondary bevel at the edge. The problem with Odin's image was the flared out diamond section before the bevel. Here's a diagram showing more what I mean: Number 3 and 4 are the hollow grinds...with the middle (number 4) being the type I see most commonly, and what I was trying to describe. Number 3 is more of a razor edge...and is very difficult to pull off correctly. Cris
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Deleted
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Post by Deleted on Dec 31, 2008 5:46:36 GMT
Well secondary bevel or not that's exactly what a hollowground bevel is.
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Deleted
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Post by Deleted on Dec 31, 2008 5:51:27 GMT
Well secondary bevel or not that's exactly what a hollowground bevel is. Are we touchy lately little bro? Seems like the last couple days you've been a bit on edge. Anyhow you're right...that is exactly what a hollow ground bevel is. I was simply trying to clarify what Odin was showing (a hollow grind with a 30* bevel). 's all good =). Cris
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Deleted
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Post by Deleted on Dec 31, 2008 6:20:16 GMT
I had tried to MS Paint the 30 deg bevel as depicted in image #4 FYI and to clarify. Thanks for posting a better picture, you accomplished what I had set out to do to begin with and with better art!
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Deleted
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Post by Deleted on Dec 31, 2008 6:22:55 GMT
Sorry, didn't mean to sound standoffish that time
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Deleted
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Post by Deleted on Dec 31, 2008 7:56:22 GMT
I had tried to MS Paint the 30 deg bevel as depicted in image #4 FYI and to clarify. Thanks for posting a better picture, you accomplished what I had set out to do to begin with and with better art! No problem...yours was actually great lol, and a bit more in depth...but for the hollow grind one =). Cris
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