Hand Tools

Subject:
Coupla thoughts

Wiley Horne
David, Winston and all,

THOUGHT 1:
Added advantage of the hollow....It’s not unusual to discover that a Japanese plane has a bump in the center of the dai, behind the mouth. Not sure of all the reasons how this happens, but one reason can be that the blade is fit too tight, (which is something I’m prone to).

How does the bump happen? Well, the plane is likely to be bedded at 40 degrees or so, and the dai is not tall like a western woodie’s body. So there's not much wood under the blade, and the mouth has cut the strength away from it. When the blade is tapped into place—or hammered!—the wood under the blade may bulge, producing a bump in the middle of the sole, right behind the mouth.

If the sole is checked with the blade removed, you don’t see this bump (if it’s there). The sole has to be checked with the blade installed and at cutting depth. Matsui Measure makes a straight edge with a notch in it for this purpose:

https://www.ebay.com/itm/Japanese-Single-Bevel-Straight-Edge-40cm-woodblock-plane-Matsui-Measure-Kanna/193523629312?hash=item2d0ee83d00:g:QqYAAOSwqDVe6uEc

This straight edge can be used to check the sole with the blade at depth—you just place the notch over the blade. Incidentally, they’re hard to find—Hida Tool is stock out. I got mine from SoYamashita at Japan-tool.

My point: check for this bump, with the blade at cutting depth. If it’s there, redo the hollow with the blade installed, so as to cut the bump away. And then consider whether the blade is too tight.

THOUGHT 2

On lapping stuff. I love to lap things. But sometimes scraping or filing is essential. Recently, I bought my first Bailey #3 off ebay, prompted by something Sir Wm. said. A Pre-WW1 model. It too had a bump in the sole, this one in front of the mouth. Which creates erratic performance that’s hard to figure out. Eventually, I found the problem, using that Matsui Measure straight edge. You can’t lap out a convexity, or I can’t anyway. It just stays there pretty much. So I filed this one away, not having a metal scraper.

In general, a double-iron plane is more resistant to sole imperfections than a single iron plane, which has to be about perfect to work right, with the front of the mouth sitting down hard on the work. But this double-iron No. 3 also wouldn't work right until the bump in the sole was removed.

That’s all! Wiley

Messages In This Thread

Light vs Heavy planes
Re: Light vs Heavy planes
Re: Light vs Heavy planes
Re: Light vs Heavy planes
Re: Light vs Heavy planes
not the direction I went *PIC*
5 1/4
Re: reframing the issue
Re: reframing the issue
Friction, and more
The experiment and conclusion are both confusing
Re: Heavy and light
The best case for heavy planes...
another factor
If you're trimming furniture...
At some point..
Inertia and figured wood
Re: Jim, what is Osae-gani? *NM*
Osae-gani
Re: Osae-gani
Note on fitting
Re:wedge fitting
funny...
Re: funny...
Re:wedge fitting
biases for the maker...
Re: Light vs Heavy planes
Re: Light vs Heavy planes
Not a positive contribution to the discussion
Re: Light vs Heavy planes
finding out who to listen to...
Re: Same
Old history
Shops using mostly hand tools..
Re: Shops using mostly hand tools..
Don felder's guitar...
Misprint?
cultural thing...
Re: Misprint?
Re: finding out who to listen to...
I agree...
Re: finding out who to listen to...
Turnover, newbies and FAQ
comment on teaching
If you get my drift...
Re: Light vs Heavy planes
new vs. old planes...
I like tools from Brooklyn
Re: I like tools from Brooklyn *NM*
Infills in the UK
I'm glad you commented.
Note on a modern infill
konrad's planes...
Re: I'm glad you commented.
what I've found...
Re: what I've found...
interesting that...
Re: Calling BS
I haven't seen it....
Re: I haven't seen it....
Re: I haven't seen it....
Re: I haven't seen it....
Re: I haven't seen it....
Truing Kanna
expanding on what jim said
Re: expanding on what jim said
Re: expanding on what jim said
Coupla thoughts
different methods of lapping and the bump
Re: Calling BS
Re: Facts, not assertions
Re: Facts, not assertions
I think we're agreeing...
Re: I think we're agreeing...
Re: Me too
Wood isn't indefinitely stable, either
Re: Calling BS
Re: Calling BS
Re: Calling BS
by the early 19th century
Re: by the early 19th century
It's not offered as ball court...
I miss Todd Hughes' contributions too *NM*
Re: It's not offered as ball court...
I'm guessing on parts here...
Re: Can't argue
Weight Comparison
more infill weights
Re: more infill weights
now there is a pearl of wisdom
Re: more infill weights
initial fitting...
one more follow-up comment.
Re: one more follow-up comment.
rosewood
Re: rosewood
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