A Brief Introduction to Coarse Particulate Abrasive Stropping

Рет қаралды 2,814

8 жыл бұрын

Recently, I've been experimenting with the use of coarse (10-30 micron) particulate abrasives for stropping, with the aim of creating convex microbevels that have extremely high push-cutting sharpness while retaining a good amount of slicing aggression.
This is an initial demonstration of the results that can be achieved stropping an edge previously sharpened to ~6,000 grit on 16 micron CBN emulsion on a leather bench strop.
As you will see, the 16 micron CBN on leather creates an apex with excellent push cutting sharpness, slicing aggression, and high sharpness edge retention.
I will be making more videos about sharpening in general and this topic in particular, but for now I just wanted to produce an introduction to my results.

Пікірлер: 15

@Rancherinaz 3 жыл бұрын

Excellent ! You da man !

@JDStone20 8 жыл бұрын

Nice work!

@steeldrake838 8 жыл бұрын

+Yehoshua Jason D. Stone Thanks. It's been fun exploring this stuff.

@thechemtrailkid 5 жыл бұрын

I really like using the Wicked Edge 14/10 micron paste after Spyderco Ceramics. Produces and incredibly keen edge

@billyboy7 4 ай бұрын

Thanks Steel.......have you tried 16 micron Diamond Spray using the same procedure?

@Universal_Craftsman 3 жыл бұрын

That would explain my problem, I often strop my knife after using the sharpening steel, and I recognized that they don't cut as well as if I just use the steel alone, I then steel them again and their capabilities are back, I use the skerper grey compound with 4 Micron, and the knifes came of the King KDS 6000, which compound grit would you recommend, when the steel isn't enough anymore?

@rockets4kids 7 жыл бұрын

Have you since tested how many inches of cardboard you need to cut in order to lose push cutting ability? Also, do you notice any micro-chipping when cutting through lots of cardboard with this edge geometry?

@steeldrake838 7 жыл бұрын

Sorry for the late reply, but no, I haven't tested how many inches of cardboard I need to cut to lose push cutting ability. The data just isn't that relevant for me since I tend to keep my knives touched up on a daily basis. As for micro-chipping, I've only really seen any significant tendency towards it on my Caly 3.5 in ZDP-189 which has a thinned out primary grind and ~7-9 degree per side edge bevel. Mind you, I generally choose my blade steels precisely on the criteria of avoiding micro-rolling and micro-chipping in light use, as its this criteria that determines how long they can be kept touched up between sharpenings.

@coreyreedhill 7 жыл бұрын

Just Fantastic. You have taken the title of Mad Genius of Sharpening on KZfaq. My only issue would be that a lot of your equipment sounds pricey, any chance of doing a short video using budget supplies? thank you

@steeldrake838 6 жыл бұрын

Things mostly only start getting pricey if you want highly polished apex finishes. For coarse apex finishes, a Norton India combination coarse/fine oiltstone and some mineral oil are an inexpensive and effective option.

@coreyreedhill 6 жыл бұрын

gotcha, Norton India, will try to get one this payday. besides the super-cool look of a polished apex are there any other substantial benefits to it? will the edge or "sharpness' last longer or give a cleaner cut? thanks.

@steeldrake838 6 жыл бұрын

The choice of what grit to finish your apex at should mostly be based on the type of cutting work you anticipate doing with the knife. Coarse finishes give you more slicing aggression and edge retention on draw cuts and are well suited to tasks like slicing cardboard, rope and carpet. Polished finishes are better for push cutting and by minimizing the force necessary to make those push cuts they can improve edge retention in push cutting stiff materials (e.g. whittling). You can get an apex equally sharp at any grit, more or less, instead what changes are the size of the microscopic teeth. Also keep in mind polished apex finishes require more stones and more time to produce.

@volcanowb 6 жыл бұрын

What microscope do you use, if you don't mind?

@steeldrake838 6 жыл бұрын

I have a cheap generic USB microscope. As I mentioned in my other reply to you, any 5 megapixel USB microscope with up to 500x magnification should work for you if you are interested in picking one up.

@volcanowb 6 жыл бұрын

Steel Drake Thanks! Really love your work!