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IMO. The loading of dust (slurry if wet) and swarf add lapping component to this interaction, therefore faster deburring. A sharp edge frees of burr/wire if it can make a clean/smooth 5th (ignore the first 4) slice through newsprint without tears/catches. Lapping is applicable for both wet...

Higher education = best investment you ever make. You certainly will take it - and maybe a few detempered knives - with you at the end.

I mentioned angle because S30V doesn't support a usable cutting bevel below 15*. Soft abrasives can abrade hard carbides if the abrasives big enough - ~12 micron for hand-power - or abrasives move fast enough (belt/grinder). When freehand sharpening high hard alloy steels at 1.5K grit or...

Just to clarify. Fine grain supports edge thinness. While edge sharpness & retention are different. For high alloy steels (exceed 0.5% of V,W,Nb combined), I use diamond/cbn (occasionally SiC) to abrade the carbides & steel lattice. E.g I mostly use diamond/cbn to sharpen my EDC s30v...

3rd generation PM steels marketed as clean and fine grain. The 'clean' is true, while 'fine grain' is relatively speaks. M390 grain is ~1-2microns in size, which is quite large comparing to carbon grain of 50-200nm. PM processes prevent carbides seggregation and other lattice maladies...

For Yoshikane SKD11/D2 @64rc knives, I found edges off diamond plates & compounds sharper and last longer than using waterstones.

I am not going to show off my mod 365mm gyuto since you guys are envious of stupidly long knives :lol2:. For home cook, most of the time I use 210mm, next is 240mm, then 180mm petty, 150, 120, 365. Excellent excuses for getting knives.

Good insights :doublethumbsup: Continuing with my non-pro speak... High velocity abrasives (belt, wheel, disc) is more complicated because effective grit & momentum vectors can easily exceed steel properties. Analogy - high pressure water can cut steel. However the final resultant impact...

A short story. A year ago I was on a mission to teach sharpening skills to my cousins (in SE Asia). 'Doh' turned out that I didn't know much, hence I lurked & learned alot from here, other forums, google-fu, etc... All roads lead to knife performance (skipped the 'look' aspect for now). I...

The other way. Edge-leading produces nicer/cleaner edge than edge-trailing.

[Waterstones] Clean: trailing - edge a bit less jagged. leading - same results. Slightly muddy: trailing - less burr, tiny convex, less teared leading - less burr, apex not as thin. However change stroke angle to 30*, to get corrected apex thinness. I conducted quite...

I just posted this msg in my 'Apex Bevel Geometry' thread in another forum. It could be a fun read, so I copied-post here: ******** I spent considerable amount of time on the physics & visualization of sharpening grind interaction -> I gave up (more like deferred) for now, since who the...

Well, mine SiC w&d are quite black in color. I asked because from your pic, the sandpaper looks dark-orange-ish as if it was a garnet sandpaper. Edit: Garnet has low Mohs (hardness), which mostly use for soft material wood/paint/etc...

Which type of sandpaper is that? I use SiC wet&dry sandpapers (120 - 2000 grit) for rounding, polishing and sometime sharpening.

Yummy - kill flies off the passing by garbage truck - paste :lol2: in bún riêu.

For me, flatten is done when the dished part is gone. I figure that angle wobbling & pressure deltas are way more destructive than a surface flatness variances.

Yes, I can zero-grind on an EP by padding the clamp area or double-side tape a 2cm piece of wood to the blade. Also to convex, I tape SiC wet&dry onto a leather strop or mouse-padded blank. Sharpness off EP & freehand are about the same, especially when strop finished. If there be any...

Your half vn is mighty big, case-in-point SON'S NUTS!!! thread. Oh, I enjoy your damsel truck story.

Sơn, đưa cho bà bác nghe tạm http://www.youtube.com/watch?v=sZwz1wn5r7o. Sounds from the past.

Micro wire/burr removal, a predictable success or tries & errors? For fun and partially serious:eyebrow:... Problem: Micro wire and or burrs on an edge after sharpened (5K waterstone) & stropped (compounds and then bare) at 12 degrees per side. Knives: 240mm, steels (good HT favored...