Hand Tools Archive

Subject:
Another test *PIC*

Winston
I decided to test the buffing again, primarily to see what would happen with less buffing.

Instead of testing a Buck Brothers chisel against a Veritas, I compared two Buck Brothers chisels. For the unbuffed chisel, I sharpened at 30 degrees, up to the Shapton 12000. For the buffed chisel, I sharpened on stones to 4000 grit (bevel side only), then I buffed it on the wheel for about 4 seconds, using a lighter touch than I did the previous time, then I deburred by touching the back of the blade to the side of the buffing wheel for about a second, which had no compound on it. (Incidentally, my buffing wheel is really wavy on the side, so the chisel was bouncing quite a bit while doing this. Not a great feeling when holding a really sharp tool!)

The buffed blade this time had a smaller microbevel at the edge. It was also subjectively much sharper than last time -- I was able to easily shave hair with it, and easily push cut across the grain in printer paper. The unbuffed blade was very slightly less sharp in these subjective tests. This is a reversal from my previous tests.

Here are microscope pictures of the bevel side after sharpening.

The buffed blade (with the light in two different positions):


The unbuffed blade:

Then I made about 20 paring end-grain cuts into pine with each chisel. With the buffed blade, it cut cleanly at first, but degraded a little bit toward the end. With the unbuffed blade, it degraded even more. At the end, I was able to shave hair with the buffed blade with a little more effort than when freshly sharpened. With the unbuffed blade, I wasn't able to shave anymore.

Here are pictures of the bevel after doing the cuts:

The buffed blade:

The unbuffed blade:

This time, the 4k stone and then buffing wheel was an improvement in all ways over the 12K Shapton: with the buffed blade, sharpening was faster, the initial edge was sharper, and the edge held better than the unbuffed blade. But the edge durability for the buffed blade wasn't as good as it was the first time around.

My takeaway from this is that, the first time around, I did too much buffing, resulting in a duller, but very, very durable edge; but this time, I didn't buff it quite enough: the edge was sharper and more durable than an unbuffed blade, but it didn't hold the edge as long as I had hoped (although perhaps my expectations for durability were set too high from that first test.)

I think that the buffed blade in test this held its edge approximately as well as the unbuffed PM-V11 chisel in my first test. I don't want to make a strong claim about this, but that's what it seems like to me.

In the future, I'll try to buff the blade a little more and see if I can get an edge that is both very sharp and very durable.

Messages In This Thread

Weaver chisel grind *PIC*
Some quick tests (lots of pictures) *PIC*
Some chisel pictures *PIC*
Re: Some chisel pictures
Re: Some chisel pictures *PIC*
astonished by picture quality *NM*
excellent pictures!
Another test *PIC*
Re: Another test
question
Re: question *PIC*
Re: question
could be a database issue...
Second try for picture *PIC*
yellow pine *NM*
Those pictures..
Nice piece of work
Re: Nice piece of work
Light source?
Re: Light source?
stitches.....
I've made a video.....
video...not for the meek...
It's a very funny video
comments on the two pictures.....
bevel width
It's the scale that escapes me
Re: It's the scale that escapes me
Looking forward to it, thanks! *NM*
More on the Weaver Bevel
Re: More on the Weaver Bevel
the premise is different in this case
I don't agree with limitation of your premise
You nailed it
This is hilarious
Jim - here's your guy
Well that escalated quickly.
Moving the needle
Re: Moving the needle *LINK*
Thanks for the memories *PIC*
Absolutely *LINK*
Positioning *LINK*
Where to find unhndled Narex chisels? *NM*
Taylor Tool Works
narex and their hardening....
how I achieved the Weaver Bever
Weaver Bevel
Further defining the Weaver Bevel
perception of penetration?
solving a problem, not creating one...
Re: solving a problem, not creating one...
BTW
rolling over edges....
On secrets, incantations and open source
Weaver grind—how is convexity added?
Marc Adams
Could've been felt...
Re: Weaver grind—how is convexity added?
The world is upside down :)
I took a nine day Sellers course
Re: I took a nine day Sellers course
it makes sense
How about making a video?
Period costume?
Re: How about making a video?
Trying things out
Re: Trying things out
Re: Trying things out
failed to figure things out...
Re: How about making a video?
Re: How about making a video?
variations on the already done...
thoughts *PIC*
Re: Weaver grind—how is convexity added?
Re: Weaver chisel grind
making peculiar names
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