Honing pressure clear example

[Seraphim]

So ,I was playing with my kids outside the other day, and they were using that big sidewalk chalk to draw on the driveway.

I was playing along as well.

It occurred to me that the driveway was like a 5 grit hone, and so I did a little honing pressure experiment.


"Honing" the chalk with heavy pressure gave me fast material removal, and also a very rough surface:

The very same location on the pavement, but with very light pressure gave a much more refined finish:

So, for a given hone grit, you can vary your result based on the amount of pressure you use. When setting a bevel, etc. don't be afraid to use some pressure, as you are looking for bulk material removal at that point. But after the bevel is set, then work on going for lighter strokes on each particular hone to finish it off before moving on to the next one.

 

[Leatherneck]

would you say that the swarf the chalk left on the sidewalk was the same as a "loaded" hone, and if so, lessened the grit of the sidewalk, contributing to the smoother finish?

This is a very interesting analogy. Thank-you.

Kevin

 

[Seraphim]

would you say that the swarf the chalk left on the sidewalk was the same as a "loaded" hone, and if so, lessened the grit of the sidewalk, contributing to the smoother finish?

This is a very interesting analogy. Thank-you.

Kevin

No. I could go back to heavy pressure in that very same line, and again get the deep striations. That chalk is so soft, it really is a non-factor in "loading up" the driveway hone.


Perhaps I should have lapped the driveway first???

 

[uberlegit]

Perhaps I should have lapped the driveway first???

I think the real question here is:
Did the chalk give you a passable shave?
Will post WTB Sidewalk Chalk pending your answer.

 

[Bacchus]

The only thing I would be worried about with using pressure while honing, especially full hollows, would be that the edge would bend giving an uneven bevel

 

[leighton]

The only thing I would be worried about with using pressure while honing, especially full hollows, would be that the edge would bend giving an uneven bevel

Thats too much pressure. As they say, "too much of a good thing."

 

[LessLemming]

very nice observation

 

[isshou]

From an objective point of view, I think the best way to show the amount of pressure done while honing could be done placing the hone stones on top of an electronic scale (a kitchen one would do it), reseting the scale to zero, and start honing, this way the electronic scale would show exactly the amount of pressure done in each step of the honing pyramid.

The advantage of this method would be, that any one with an electronic scale would be able to reproduce and learn the right amount of pressure t exercise while honing.


Just my two cents !.

 

[adonnellyr]

From an objective point of view, I think the best way to show the amount of pressure done while honing could be done placing the hone stones on top of an electronic scale (a kitchen one would do it), reseting the scale to zero, and start honing, this way the electronic scale would show exactly the amount of pressure done in each step of the honing pyramid.

The advantage of this method would be, that any one with an electronic scale would be able to reproduce and learn the right amount of pressure t exercise while honing.


Just my two cents !.

That's an interesting idea..