Make a Knife Groove Tool! - Katana Bo-Hi Polisher
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- Опубликовано: 28 июл 2024
- Japanese swords often have a groove known as a bo-hi carved into them. In this video, swordsmith Walter Sorrells shows the making of a tool used to polish these grooves. The tool can also be used for making grooves in Western style swords and modern knives.
Bo-hi Scraper Video: • Tools of Japanese Swor...
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Facebook: / waltersorrellsblades
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That tip to put the tap handle into the drill press to keep it lined up is pure gold!
Watched the old video! Definite improvement on today's cuts! Thanks for the wealth of knowledge you've given and continue to give this community!
Groovy man
Great tool idea to jump off from. Maybe forge out some spring clips for the side pieces instead of rubber bands? Sliding dovetail for the bottom sanding form instead of screws, so smooth and even all of the way instead of spaces left under the sand paper at the screws? Love the various sizes idea, could be useful to adapt as needed for woodworking and refinishing antique furniture too. Thanks for sharing this with us.
Love the emphasis on japanese style blades lately, love it!
Nicely done.
I've always liked homemade tools.
Thank you for another video walter.
I think I would adhere a layer of sheet rubber or gasket material to the top surface of the off-hand rest. Just to make sure your hand doesn't slip off.
Haven't seen your work for awhile, and this morning here you are! This is a cool idea that looks like something I can use in woodworking! As usual, I enjoyed your humor and your presentation. Funny, I don't have 3 hands either! Doesn't do much good for me to complain about it! But it is reality, and working alone it often comes up. Enjoyed.
Thanks for showing how and sharing that
Fascinating!
Thanks for sharing.
I was just puzzling over how to do this the other night. Thanks, Mr. Sorrells
Looking forward to next one. Great vid
I’m very late to the game. My sons want to build knives. I’m more into jewelry and small sculptures. In jewelry, you make a lot of your own tools because commercial tools are very expensive and those one-off wonders can cost! So making your own tools, customized tools makes real sense. I’ve discovered that I enjoy making the tools as much as making the jewelry, lol. It engages my aging brain and should be beneficial for my sons. One is 39, the other 42. One is disabled and can’t do heavy manual labor anymore. The other is a talented graphic designer whose boss wrecked the company during COVID-19. His job evaporated. But they’re into making blades and I have a tiny shop that we can work from. I inherited my grandfather’s anvil and small forge. I can help update the tool selection to better quality tools. I need them for my sculpture work. I’m disabled and retired and bored to pieces. I look forward to watching all of us better our skills!
Just an idea...
Instead of semi-round clampy-thingies you can try with pipes of the same material and bungee cord that goes trough them.
I had the exact same idea. Just drill out the poly rods and run some elastic cord through them and tie it off. Then it doesn't matter if the clamping rods rotate as you move the sandpaper.
European blades only very rarely had forged in fullers. The blade profiles and fillers were often scraped in. This can be seen in period artwork
I think I could make one of these. I don’t have any of those fancy machines, but I have a saw, a file, a hand drill, some sandpaper, a rubber band ...
Great idea and a good looking tool. I would try rubber O rings instead of rubber bands. I have used them and neoprene O rings with a lot of success in similar circumstances. Thank you for your always interesting presentations.
Been wondering how to approach putting a fuller in my Bowie. Sweet.
The description of hand sanding reminded me of polishing brass at recruit training lol
Without Brasso too, lol!
Interesting; haven't seen one of these tools before.
Great tool
Make the sandpaper keeper dowels stick out of the end of a small clamp like this ( >= ). That way you can clamp it on the tool from the front without fiddling so much.
Great idea... Hmm that clamping rods should have a bit longer and groves on both sides and two rubber bands clamping it to the aluminum block. So you just need to pull the used sandpaper bit for bit trough.
I'm curious how well it has worked for you in the past year? Was making it worth it?
Great video and tool idea, thank you!
P.S. Just curious, why didn't you mill out the groove on your mill?
Besides files and small contact wheels on a belt sander, any tips for creating serrations? Ive messed around with veff type serrations as i find theyre easier to add.
Can you show us how to make a fuller scraper?
I have a spring loaded tap guide that centers onto a tap wrench like you used the tap at 6:30. Keeps it perfectly centered and gives it the pressure needed to drive the tap forward.
Literally worth it's weight in gold when tapping mokuti or titanium bolsters for hidden hardware with 2-56's.
If i wanted to make a knife that would come in contact with metal alot what metal would i use so the metal wouldn’t dull when i cut metal with it?
Would different grits of lapping compound and a steel rod sand a fuller easier than sandpaper? Im assuming it must not work or you’d be doing it already but seems plausible.
Hey, can you tell me what make is the lathe?
Do you cut your bo hi before or after heat treat?
You ever make oroshigane?
You kinda inspired me to make some from your tamahagane video, and i honestly can't fucking stop making this stuff. I wanna know if you've experienced with it and what you're thoughts are
Walter why not use o rings in place of the rubber bands??
Why not use diamond abrasive? Chop saw up round files in various grits. That's how I shape hard to reach curves.
Wouldn’t it be easier to control if the handle was perpendicular to the direction of the fuller? Imagine a d-shaped bracket holding the handle similar to spades have.
Your "three hand" tapping technique can be easily avoided. Just put the tap into the chuck, but don't tighten it too much, this will allow it to spin when it bottoms out. The tap body is hard enough that it isn't damaged, and smooth enough that the chuck jaws are not damaged. Put the mill in a low r.p.m. and you can power tap. Much easier than growing an extra arm.
That tap was about as crooked as possible without breaking 😂
I am dying to hear Walter sing the song “Mr. Bojangles “
😅👌
I would have broken that tape before I got 3 threads in it with a drill
Same here...
“The bo hi is originally cut out with a scraping tool, or scraped out with a cutting tool.”
Well, which is it? 😜
1
FYI, if you are drilling and tapping aluminum CRISCO is your friend. White in the can.
0:30 "In Japanese it's known as a he or a hoe he". Man I can't stop laughing lol
Making Grove in the tool with mill to making Grove in the knife "really"
Congrats you just gave a chinese company a new design to steal. But really nice design none the less