Quantcast
Hiromoto bolsters - how are they attached? How is the blade hardened?
+ Reply to Thread
Results 1 to 9 of 9

Thread: Hiromoto bolsters - how are they attached? How is the blade hardened?

  1. #1

    Join Date
    Jul 2012
    Location
    Ghent, NY
    Posts
    940

    Hiromoto bolsters - how are they attached? How is the blade hardened?

    I got a 270 Hiromoto Gyuto delivered yesterday and took the handle slabs off today. They shrank and you could feel the sharp edge of the tang. I intended to do a Yo rehandle on this, but if the blade and tang are not hardened I might can band saw the bolsters off and convert it to Wa. Any idea how they are attached - looks like solder, but very clean with no big puddle.

  2. #2
    Senior Member ThEoRy's Avatar
    Join Date
    Feb 2011
    Location
    Central Jersey
    Posts
    2,763
    I've heard of people grinding bolsters off.
    Starting this harvest I'm a starving startling artist/
    Lyrical arsonist it's arduous spitting this smartest arsenic/

  3. #3
    Senior Member

    SpikeC's Avatar
    Join Date
    Feb 2011
    Location
    PDX
    Posts
    3,773
    Why not reshape the bolster into wa shape?
    Spike C
    "The Buddha resides as comfortably in the circuits of a digital computer or the gears of a cycle transmission as he does at the top of a mountain."
    Pirsig

  4. #4

    Join Date
    Jul 2012
    Location
    Ghent, NY
    Posts
    940
    I see brown on the tang behind the bolster now so it's seen heat. I emailed Adam Marr and he concurred they are welded on. I may be doing that Yo rehandle after all.

  5. #5
    Dave Martell's Avatar
    Join Date
    Feb 2011
    Location
    Fleetwood, PA
    Posts
    9,285
    The bolsters are definitely welded on and the tang will be partially hardened at (around) the first pin hole at least where the ass end is usually soft and pliable.

  6. #6

    Join Date
    Jul 2012
    Location
    Ghent, NY
    Posts
    940
    Thanks Dave - I was looking at the first one on page 41 of your gallery and that seems like the best of both worlds. The one you bobbed the tang on with the ironwood handle - that was a smooth move.

  7. #7
    Dave Martell's Avatar
    Join Date
    Feb 2011
    Location
    Fleetwood, PA
    Posts
    9,285
    Quote Originally Posted by Mike9 View Post
    Thanks Dave - I was looking at the first one on page 41 of your gallery and that seems like the best of both worlds. The one you bobbed the tang on with the ironwood handle - that was a smooth move.

    That's sure easier than grinding the whole blade after grinding the bolster off plus you could still go wa and leave the bolster, maybe incorporating it into the handle shape.

  8. #8

    Join Date
    Feb 2011
    Location
    Salt Lake City, UT
    Posts
    2,327
    You could do a radar esk handle like the kikuichi in the twin cities meeting thread.

  9. #9

    Join Date
    Jul 2012
    Location
    Ghent, NY
    Posts
    940
    I went partway in that direction. I cut the top of the tang down then cleaned up around the bolster. I got this tremendous block of ironwood burl with sapwood running through it. Unfortunately it was on a corner. I had to make a jig to bandsaw the block in half diagonally. Then I rabbeted both sides to go around the tang then traced and cut around the back and bottom of the tang and epoxied the whole thing together. After it set I started stock removal and shaping the handle before polishing it and the bolster. Then I rounded the spine and choil, thinned behind the edge, polished that and sharpened to 6k followed by stropping. Then I got the idea to shave some carnuba wax and mix that with some sweet almond oil and apply that to the handle, warm it with a blow dryer and buff. Spectacular shine now.

    It was a difficult glue up and while shaping the top of the handle revealed the glue joint as a dark line. oh well I have an idea for next time, but it's still a great looking and feeling handle. This knife by the way could well become a favorite - the geometry is excellent, the blade is thin and the AS takes a wicked sharp edge. It looks odd on the bar next to my long handles, but the balance point is an inch ahead of the bolster now - (much better than stock)

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts