in this video I want to teach you how to
use a scraper and sharpen scraper. this
is a very very effective tool, but it is
tricky to sharpen. the edge dosn't last a long
time and have to get it right.
this is brand new scraper it's pretty typical
spring temperate steel, it's got about
average thickness and more thicker
some are thinner more flexible, but the
first step in getting a good edge is to
file it flat and nice and square with
the edges. and you can make a little jig
like this for yourself a little slot on
the block of wood put a file in it and
you can join this very effective.
I tend to want to go with the file and
just hold it in my side vice. I like he has a
fairly fine file.
course a fine file with even nicer surface that will take
less effort to Stone. and I just relax
file across the surface
it's very nice with this big wooden surface of
the bench to help me to keep this going
flat to the rod. And I would file until i get a nice
sharp edge, which I do have. I don't get in
your idea that you have to have a flat
straight surface. this is a very effective
scraper with lots of different curved
surfaces. little trickier to sharpen
because of the curves, but this scraper
easily can have a small camber to it
or whatever for certain kinds of
scraping work. the next step is now is to
hone these edges to bring them up to a
sharper and sharper and sharper square
corner that's going to be the edge that
we're going to be using to do the work
we want to do. normally I would file two
of the long edge of the scraper and sharpen them at the
same time. But you can also sharpen the
edges in the end and sometimes actually
do use that
as a tool for getting into corners and
scraping glue in that kind of a Thing.
So i'll start at a 500 grit Stone. I just
hold it vertically and trying to work my
way a long, light pressure, if you find this
is hard to do you can imagine all kinds
of blocks you can make the guide your
work against the stone keep yourself
nice and squared.
and just like the back of the blade I'll
do the sides of this at a finer Stone.
So I move to a 1000 grit and repeat the process. I want to go until
I feel really really sharp edge here
that is capable doing some cutting
it takes awhile to prepare the edge.
Ok let's go to the last Stone, 4000 grit Stone.
and I do the sides and the longer you use
a scraper and sharpen it, the better this
polish gets on the two sides and the
edge and will last
or will create a better edge and last longer
just like on a plane blade.
That feels pretty good. now this curved scraper
the honing is exactly the same, only
you've got to go over the arc that
you're going to be using and usually
you're using a small part of this so
I'll sharpen the area that I need, not
the whole thing.
let's see how well we did here, in terms
of how it works. it should really soon
make a shaving at this point, or it's not
really an effective edge yet. And there is a bit of
sharpness right there. You can see a lot of dust
but it is making shavings.
ok let's go to the next step which is
rolling the burr and creating a more
effective cutting-edge. but this very
square edge with no burr, is what I would use
to scrape bad of varnish or shellac
finish, it is very effective, very clean
and something worth knowing about. so the
first step if there's a little Burr on here
already or replacing the the burr
renewing the Burr, is to go and use a
burnisher to lay down to Burr. so you can
use a round burnisher, you can use the
triangular burnisher, there are actually oval burnishers too.
to but these will do most of the work we
need to do. a round burnisher is useful
for a curved scraper, where you want to go
around curved edge it easier to maintain
the pressure to roll up the Burr. I tend
to like triangular burnisher and that's
what I use to sharpen my scraper. so the
first step is to take some oil, this is
Camilla oil works fine, put a little bit of
oil (on your Wood) on your steel, just to
lubricate the process. so it's a little
bit more gentle on the Burr. And you want to
work hard in the edge
or it its a burr here lay it down
so the idea is if you have a light Burr you
have made you can roll it down roll it
back up
roll it down roll it back up, a series of times but
it's never again be as sharp as the
first time. Laying the burr down and
preparing it now to roll the burr up. this is
the tricky part about the burr. As you want
to be gentle but you want to be firm. and
I like to roll it up along the edge roll
again along the edge and a third time
along the edge. I'm trying to keep the angle
fairly perpendicular but I am rolling as
I go and I've got another
edge to do here. along the edge, along the
edge, along the edge. and this is what the
Burr looks like. if you roll it up too much
then you go to work the scraper much
more low, much lower to the work, that is
much more difficult. so I have got a
fairly nice fine burr here, that's all I am
looking for. because I want to be able to
renew this several times without having
to go and file it and hold it and that
kind of Thing. Lets clean this of. you want get all the oil
off, it doesn't contaminate your work
And lat look what kind of edge we actually got here
Thats about as an edge as you can asked for.
Making nice shaving, not a lot of dust and as the
edge degrade it will start making more dust.
The beauty of scrapers you can scrape on
almost any direction, you can scrape out
this bird-eyes like in this piece of maple
little pieces of tear-out, or whatever.
And you work in whatever direction you want and
I like the idea that you can feel the
way the tools cutting keep quite direct
or bend over or less aggressively and
you can work your way in
let me show you some ways that i might
use a scraper. let's say you've got a
spot like right here where some tear-out
is happening, when you're trying to
plan it. Well rather than just raped that
little spot you want to scrape out a much
larger area
you don't just have a hole there. this is the
way I would work. Work around for the out side,
and eventually get in to the middle
There you go. Not a dish but just more a Level with that Little spot of tear-out taking out.
another thing about scrapers, as you
can scrape in any direction. Unlike a
plane that has his best direction, a
scraper works equally well
going against the grain as with the
grain, as you can see. Now already the
edge is degrading little bit but not to to
much
An other thing I like about a scraper is you
can control it to cut very accurately in a
very precise position if you want to or
you can use this broad cutting to level the surface
more on a larger area
sometimes I pull a scraper, more
likely I pushes scraper and the
flexing of it gives you the control to
give you the stability, its really a plain
gives you the stability to be able to work
but the problem is the edge dosn't last very long
So with this edge is no longer cutting
effectively, i can go and burnish it down again
roll it back up again and if the burr
small you can do this two or three times
and then eventually have to file the
edge and renew it completely, so I'm
rolling the burr down that i have on here
flaten it right up and as I said before there is
certain amount of friction
work hard in to the steel, I can roll it back up again
and it doesn't take a lot of pressure
I like a small burr that would be very
effective. Let me clean this off and we can see
how it works
here we are with a nice frech edge
notice how it is making much less dust
than it was before
mostly nice clean shavings. so try to the whole
blade don't just use the Center, trying to
use all parts of the blade and you have
two edges, you have a back edge too. or you might have a
top of the bottom edge as well, so you have
four cutting edges. A scraper is not necessarily an
easy tool to learn how to sharpen, but its really
worth learning how to do it, because of
the tool that will smooth any wood small
areas where your plane having tear-out, a
scraper is the tool to come to your rescue
and level it up. experiment with
different Burrs, different pressures
different angle, but you'll find it's
very very flexible and the way you
handle it and the way of work. That is one of
those tools as a furniture makers that i
very much appreciate because it's so
simple but yet so effective.
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