Hand Tools Archive

Subject:
Profile pictures *PIC*

Winston
Here's my attempt to get profile images of the chisel. I needed a narrow chisel to fit sideways in the microscope, so I used a 1/4-inch wide Narex Richter. This time I decided to simplify the sharpening procedure: I used a 1000-grit diamond plate, and then buffed with the soft cotton wheel and white rouge (I'm liking the soft wheel better than the stiff sisal one). This could be done in 30 seconds.

The diamond plate leaves some pretty deep scratches (the scratches are not nearly as consistent as the Shapton Pro 1000) and a hefty burr. Compared to previous chisels where I used the 4000-grit stone, this one required more buffing to remove the burr. I briefly touched the back of the chisel to the side of the wheel to remove any possible remaining burr. This is what the bevel side looked like.

This is the sharpest I've ever gotten a chisel. It was capable of cutting hairs without touching skin, which is something I've never been able to do before.

I followed Bill's suggestion of taking profile pictures of the blade. I tried illuminating it from the side, but you can't really see much detail of the edge.

So for the rest of the pictures, I used the microscope's backlight. Here it is with the 4x objective:

And with the 10x:

Another one with the 10x, but with a tiny flashlight that I hand held. It's a much smaller light source. The edge looks a bit more rounded in this picture, but I don't know which picture provides a more accurate idea of the actual shape.

I also tried using the 40x objective, but I couldn't really get it to focus well. Additionally, the rounded appearance of the edge might be in part from blurring. I'm including the picture here, but I wouldn't draw any conclusions from it.

*****

There's one other way I tried to get a sense of the shape of the edge. I placed the blade under the scope, then I held the light directly horizontal from the edge, and then slowly raised the light so that the reflection would change. You can see the reflection slowly move from the very edge, until it hits the main bevel and lights up the whole thing. It sort of looks like a sunrise seen from space. I can't include a movie in this post, so here's a link.

https://imgur.com/a/qBcM9UK

The steepest angle that can be seen with this setup is 45 degrees, since the blade was resting flat on the stage and if the light is lower than directly horizontal, the path from the light to the blade is blocked by the stage.

I don't know if the shape of this blade is ideal -- it performed extremely well cutting hair, but I haven't tested it for durability. That said, I don't have any reason to think it would be substantially different from other blades I've prepared in a similar way.

Messages In This Thread

Sharpening and buffing progression pictures *PIC*
Separate on the IH sorby chisels..
If the UK guys are correct...
Comparative Profile Pictures
Re: Comparative Profile Pictures
Re: Comparative Profile Pictures
I have never looked closely at...
Profile pictures *PIC*
Thoughts on the data
Scale of Image
Re: Thoughts on the data
Angle near the edge *PIC*
Re: Angle near the edge
Re: Angle near the edge
This is a difficult thing to do precisely
Re: Angle near the edge
Capturing the Unicorn Profile
Re: Capturing the Unicorn Profile
Outstanding work, Winston! *NM*
Re: Capturing the Unicorn Profile
but, do I need to?
Calcined alumina *PIC*
sounds like gunpowder...
Scratches from various compounds *PIC*
Scratches from more compounds; buff vs stick *PIC*
Other Compounds
Re: Other Compounds *PIC*
Correction
Re: Other Compounds - reinventing the wheel...
will do...
Well! good work
Red stuff
File in useless knowledge
partly my fault for voluminous posts..
hardness of iron oxide
Google monster says
Re: hardness of iron oxide
Wooden planes
Re: Wooden planes—Steve Voigt link *LINK*
Re: Wooden planes
Re: Wooden planes
Re: Wooden planes
Re: Wooden planes
Thanks, Jon!!
Re: Wooden planes
great experiments
Re: great experiments *PIC*
Re: Scratches from more compounds; buff vs stick
wait till you try...
The white stuff is...
Re: The white stuff is...
various compounds - difficult to judge
Re: various compounds - difficult to judge
looking forward to...
Further Observations
Some other things to try
Re: Some other things to try
Re: Some other things to try
Re: Some other things to try
I am anxious to try your suggestion *NM*
Interesting..
Re: Interesting..
not sure I agree
Re: not sure I agree
Re: not sure I agree
Re: not sure I agree
Re: not sure I agree
Factory ground *PIC*
Marples catalog...
Re: Factory ground
Re: Factory ground 1816 *PIC*
Re: Factory ground 1816
Re: Factory ground 1816 *PIC*
blogger grind
Re: blogger grind *PIC*
you're still failing...
after you do your survey, you'll find
Re: Factory ground 1816
Re: not sure I agree
I remember reading this...
great work
Thank you for experimenting
these results will require some study
David & Winston
Buffing wheel vs hard felt
Re: Buffing wheel vs hard felt
Re: Buffing wheel vs hard felt
Re: David & Winston
Thinking about establishing the Unicorn profile
Amen, Reverend
Re: Amen, Reverend
Tormek
if the tormek had a higher speed leather wheel...
Clarification, please
Re: Clarification, please
Re: Clarification, please
Re: Clarification, please
Re: Clarification, please
Preparing a beading blade
Re: Preparing a beading blade
for testing plane blade durability..
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
Suzuki Tool 4000
judging scratches
eek...expensive..
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
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