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Type: Posts; User: bluntcut

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  1. Replies
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    IMO. The loading of dust (slurry if wet) and...

    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...
  2. Thread: I feel bad

    by bluntcut
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    Higher education = best investment you ever make....

    Higher education = best investment you ever make. You certainly will take it - and maybe a few detempered knives - with you at the end.
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    I mentioned angle because S30V doesn't support a...

    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...
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    Just to clarify. Fine grain supports edge...

    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)...
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    3rd generation PM steels marketed as clean and...

    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...
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    For Yoshikane SKD11/D2 @64rc knives, I found...

    For Yoshikane SKD11/D2 @64rc knives, I found edges off diamond plates & compounds sharper and last longer than using waterstones.
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    I am not going to show off my mod 365mm gyuto...

    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. ...
  8. Good insights :doublethumbsup: Continuing...

    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...
  9. A short story. A year ago I was on a mission to...

    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,...
  10. The other way. Edge-leading produces...

    The other way. Edge-leading produces nicer/cleaner edge than edge-trailing.
  11. [Waterstones] Clean: trailing - edge a bit...

    [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...
  12. Sharpening stroke - edge trailing vs edge leading

    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 &...
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    Well, mine SiC w&d are quite black in color. I...

    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...
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    Which type of sandpaper is that? I use SiC...

    Which type of sandpaper is that? I use SiC wet&dry sandpapers (120 - 2000 grit) for rounding, polishing and sometime sharpening.
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    Yummy - kill flies off the passing by garbage...

    Yummy - kill flies off the passing by garbage truck - paste :lol2: in bn riu.
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    For me, flatten is done when the dished part is...

    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.
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    Yes, I can zero-grind on an EP by padding the...

    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. ...
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    Your half vn is mighty big, case-in-point SON'S...

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

    Sơn, đưa cho b bc nghe tạm http://www.youtube.com/watch?v=sZwz1wn5r7o. Sounds from the past.
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    Micro wire/burr removal

    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...
  21. I am not sure the exact qty of abrasive in...

    I am not sure the exact qty of abrasive in compound or slurry products.

    Form:

    * Compound = abrasives + small amt of lubricant. e.g. 5gr of abrasive + 1gr of gel detergent.

    * Slurry =...
  22. Gitsome... ...

    Gitsome...

    https://www.us-products.com/sitehtml/products/compslur.php
  23. I bought the 100gr verion and have been using...

    I bought the 100gr verion and have been using both diamond & cbn slurry oil base for the last 6 months. The oil is smelly for a couple weeks, leave it outdoor help. Initially I smear the stuff onto...
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    I've thinned (essentially zero-grind) 5 spyderco...

    I've thinned (essentially zero-grind) 5 spyderco zdp-189 knives: cf stretch, delica, dragonfly, 2 ladybugs. Mono vs clad - thinning a ladybug(1.78" blade) was more work than reprofiled (thinning...
  25. My other chopsticks - solid stainless steel...

    My other chopsticks - solid stainless steel nunchucks :biggrin:
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