Knife porn thread

Just bought a loupe and have no idea what I'm looking at or looking for; my edge just seems pretty (surprisingly) uniform under both 30x and 60x?

Well that’s good news! Maybe check edge whilst trying to deflect it to see if there’s a wire edge extruding from cutting surface?
Difficult to take pics down lens but here’s a new knife out the box at 30x and 50x. You can hopefully see main bevel sharpened at ~800 grit, not polished and then a secondary microbevel added at very end of cutting surface (at ~30 deg or so) at ~2000 grit. This isn’t present on other side and is to add a bit more strength to cutting edge.

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This is interesting.

I'm using an 800 and 3000 grit waterstone. After 3 or so years use the 800 grit stone is definitely taking on a concave profile. Is there a way of reintroducing some straightness or is it new stone time?
My instinctive feeling is that a decent flat surface (worktop) and some coarse grade (80 grit?) production paper without water, but (the paper) rinsed regularly, might be the way forward.
Any better ideas?

Yes exactly that. The crisscross line are there to see when you reached a flat surface over the whole area.

80grit sounds way to low maybe 180 as a see how it goes start

Thank you both.
ETA:those criss-cross lines look like they are pencilled on - rather than being gouged.
Is that right?

yes, just pencil

Naniwa also sell a flattening stone for this purpose.

Hi there.
It's been 3 months since I got myself a very well-known Benchmade 940 O.
I was a bit hesitant to buy because of all the issues I've been reading on Benchmade QC and misalignment seemed hard to understand for such an expensive folding blade.

But so far, I can tell that this is one of the best knife I've owned in my life and everything else now seems a bit weird.
I still edc an Ontario Rat 2 d2 from time to time and it's a nice tool at a bargain price, but the feeling I have with my osborne is truly unmatched.
So much that I decided to grow a mustache and build my next bike around this paint-scheme (purple ano and dark green).

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One of these? https://heinnie.com/benchmade-osbourne-940

Cheap AliExpress diamond stone would probably do a good job.

Depending how dished it is, it can take an age to get flat again.
I'd recommend giving it/them a quick flatten before or after every use.
It's only a couple of minutes as opposed to a half hour session if you let it get to bad.
I use the niniwa flattening stone as mentioned above (the big one) but coarse sand paper does the trick also. Good luck

Exact same one, yes. I bought it thanks to a voucher/coupon I had.

If anyone wants to geek out on YouTube, The Origins of Precision does a pretty good job of explaining how modern nerds went about making things flat. Really, really flat. The same principle behind that flattening stone applies.

Illegal in the UK, no? Single hand opening, locking blade?

I can also recommend Simon Winchester's book Exactly. As a young engineer it was an enlightening read. As a middle-aged engineer I should read it again.

Do you have a link for this?

Huh?

In the UK, you are not allowed to carry certain blades in public without good reason. These include anything over 10cm, locking or able to be opened with one hand. Perfectly legal to own one and use it at home or on private property, just not wise to EDC.

*cutting edge over 7.6cm
**open automatically by manual pressure applied to a button, spring or other device

Surely any knife with a thumb stud, locking or not can be opened one handed, my understanding is that bit of OWA 2019 legislation is designed to prohibit automatic openers and gravity knives.

Nevertheless:

Illegal in the UK, no?

*Illegal in the UK? No.

Anyway, the reasoning behind the 2019 amendments to what consititues a ‘flick knife’ were:

The previous definition of a “flick knife” referred to the mechanism that activates the blade being in, or attached to, the handle of the knife. This did not capture more recent designs of knives which are now available which mimic the speed and way in which a flick knife can be opened through a mechanism not in the handle itself.

I can’t imagine where an automatic opener could have a mechanism anywhere other than the handle (or attached to it.) No doubt there was a specific loophole they were closing - can anyone figure out what kind of thing it was trying to curtail?

Wi fi or Bluetooth activated knife? 😀

“Hey siri make this handle stabby stabby”

Two more Swiss jobbies.

‘Versitool’ branded Wenger blade. Looks like a mega thin watch case knife.

SAK Rogue, like a Rambler but with flathead on the multi.

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Iirc there are styles of thumb stud that allow you to simulate the action and speed of a flick knife