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Post by lamtab on Aug 28, 2020 12:08:15 GMT
Hey guys I recently got this beautiful piece www.samurai-katana-shop.nl/en/skyjiro-/303-bonji-tameshigiri-katana-243-shaku-.htmlwhich is very pretty and a great cutter, but I do have a couple of problems. After a couple cutting sessions the fuchi started rattling. You can hear the sound and feel some movement when you hold it. Second problem is that the edge rolled a bit, as seen in the image below What should I do?
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Post by jyamada on Aug 28, 2020 17:42:11 GMT
Shim the fuchi. If there's a lot of movement, I use thin wood veneer w/adhesive backing. If very little movement, use painters tape and/or paper.
Use a small piece of fine sandpaper (400+) to smooth out the roll, then blend it into surrounding edge. Be careful not to mess up the symmetry and original edge profiling with a steep bevel. Then polish the area with ultra fine stone, strop, or sandpaper. And again, be careful not to mess up the symmetry and original edge profiling. There will be a micro blended bevel in the area, but that shouldn't affect cutting if the touchup and blending is done right.
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Post by lamtab on Aug 28, 2020 18:23:34 GMT
I will try to fix it this way. Any idea about the appropriate angle?
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Post by jyamada on Aug 28, 2020 19:02:39 GMT
I will try to fix it this way. Any idea about the appropriate angle? I usually go slightly steeper than the original edge angle. This reduces the amount of material that needs to be removed, but will produce a micro bevel. The shoulder of the bevel can be blended/rounded with high/fine grit polishing to reduce resistance for cutting. Following the original edge angle will require more material removal with less/no bevel. It helps to practice on a cheap knife before trying it on a blade you care about. It's not hard to do, and if you cut a lot, it's good to learn how to maintain edges and fix minor dings.
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Post by lamtab on Aug 29, 2020 12:04:07 GMT
I am going to get wetstones and sandpaper to work on my blade.
Can you propose wetstones and sandpaper grit for sharpening?
I will get the grit you mentioned to fix the blade but also a set of stones and paper for future use.
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pgandy
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Senior Forumite
Posts: 10,296
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Post by pgandy on Aug 29, 2020 13:03:48 GMT
For best results use oil with the sandpaper. Any light oil will do. I use WD-40 and actually water will do.
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Post by jyamada on Aug 29, 2020 18:40:15 GMT
I am going to get wetstones and sandpaper to work on my blade. Can you propose wetstones and sandpaper grit for sharpening? I will get the grit you mentioned to fix the blade but also a set of stones and paper for future use. To fix chips/rolls, I don't go lower than 320 paper. Usually 400, 1000 or 1200, than strop w/leather and green polishing compound. For routine edge maintenance, leather strop w/compound on a 1x30 belt sander. There are also a lot of vid tutorials on youtube using a 1x30 sander for sword sharpening. I sometimes use waterstones in 600, 1000, 1200, 4000 grits if a larger area needs to be cleaned up. Again, important to practice on a cheap knife or sword before doing this on anything you care about.
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Post by lamtab on Aug 30, 2020 12:56:04 GMT
Thanks for your help. I will practice on a cheap sword and then try to fix it
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