Hand Tools Archive

Subject:
Re: Thoughts on the data
Response To:
Thoughts on the data ()

Winston
> The Unicorn Profile has what seem to be three attributes, two closely related- fast and sharp, and, durable. the question in the minds of the bystanders is what does it take to get these benefits? The variables are buffing compound, wheel type, wheel speed, angle the tool is presented, buffing time....others?

FWIW, here's the drill buffing kit I used, in case others want to try it out. At $10, it's worth a try.
https://www.homedepot.com/p/RYOBI-Metal-Buffing-Kit-7-Piece-A10BK72/301848645

I found that initially, I didn't have the wheel centered very well on the arbor, and so the amount of pressure on the chisel varies a lot as it spins. I got it more centered by shifting the wheel around and pulling the drill's trigger, and repeating until it looked better. I think that this may be why my initial attempts didn't seem as sharp as a chisel right off the 12000 grit stone -- the off-center wheel resulted in more pressure, which resulted in more rounding. With this most recent attempt, I was able to apply a more consistent, light pressure. (I may have also held the blade at an angle closer to tangent to the wheel, but I didn't pay much attention to angle for the first few chisels, so I don't know for sure.)

> The shape of Winston's Unicorn Profile is what I expected it to be. At what appears to be 0.001" , the size was not. Winston, are you certain of your scale?

Do you mean that the rounded portion is larger or smaller than what you expected?

I based the scale off of the hair that I measured to be just over .002" with a micrometer. I think it's pretty accurate, but I can check on it again. There is a bit of growing and shrinking of the image as the camera tries to focus, but it's not huge. Maybe a 20% difference in size from largest to smallest.

> These results from Winston are going to be useful for those looking for a quick reliable way to get sharp. Hollow grind, seconds on a fixed or loose diamond plate, buff , done. Cheap, quick, easy to master. It would seem that this procedure just obsoleted expensive stones.

I suspect that you'll still need a fine stone to work the back of a chisel on occasion. And there's still the matter of plane blades...

> The other audience is looking for durability. Is this 0.001"edge durable? Probably yes is it looks like Weaver's.

I'll try to do a durability test at some point.

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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