Hand Tools

Subject:
expanding on what jim said
Response To:
Truing Kanna ()

David Weaver
japanese planes because of the hollow, will rely on the condition of the wood just in front of the mouth to work properly.

A double iron wooden plane will show wear in that area fairly quickly, but it will be a long time before it matters because the wood ahead of it and behind it hasn't been removed.

The bearing points on a japanese plane are chosen like that as I believe there wouldn't have been an easy way to true the sole of a plane "superfine" without biasing the process by removing most of the wood. Everything but the toe and the area in front of the mouth is removed so that just those strips can be tuned.

While I may condition a double iron plane once a year or every two years, the literature for japanese planes says that in heavy use, conditioning more than one time in a day was not uncommon.

single iron wooden planes will work OK if the mouth is eroded a little bit as a shaving will be able to lift a little bit, but not unrestricted. The use of the cap iron negates the issue because it works several times better than mouth tightness, and then large parts of the sole need to wear unevenly before truing is necessary.

Just as a follow up comment, I make quite a few planes and so have a long and very flat abrasive lap. It's how I true planes, and it's not historically accurate anywhere. I have trued japanese planes and used them without doing anything else, and they work wonderfully, but my lap is flatter than 99% of table saw tables (there is no area under pressure on it where a 1.2 thousandth feeler will fit under a 24" starrett edge).

I no longer use japanese planes much, but would probably do this in secret for my own use rather than following the traditional method described above. I've modified the wear on a couple to use a double iron more easily and they work great (leading back to the comment above where slight erosion at the mouth becomes a non-issue).

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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