Spyderco Forums

On a separate note - has anyone else noticed that BD1N responds extremely well to a butcher’s steel? I sharpened my z-cut a couple of days back and got it to hair popping sharp using my usual gear and strops. The next day it got some heavy use so I thought I’d give it a quick touch up on my butcher...

Helped teach a freehand knife sharpening class over the weekend. Been teaching freehand knife sharpening for 7 years now. I enjoy taking a rather complicated subject and simplifying it into something entry level that could be understood and that gives excellent results. https://i.imgur.com/Lr6Gugg.j...

On a separate note - has anyone else noticed that BD1N responds extremely well to a butcher’s steel? I sharpened my z-cut a couple of days back and got it to hair popping sharp using my usual gear and strops. The next day it got some heavy use so I thought I’d give it a quick touch up on my butcher...

There are many different ways to get the same hardness but not all are equal because the hardness is only measuring the sum of the constituents in the microstructure not the individual components that contribute the most to strength or toughness or the lack thereof. A great example is work that was ...

Well these are all very interesting ideas that everybody is sharing.

Are there any knives out of the latest reveal that you guys want to see videos or pictures of at the Show?

https://i.imgur.com/YiB7e6M.jpeg Spyderco CPM 20cv Manix 2 lightweight factory edge 1000x magnification. Factory edge has carbides exposed from matrix at the apex. We can see the edge is bristling with carbides from ~2 to 5 micron. On paper the carbide volume should be near ~20% volume which is mor...

apollo wrote: ↑

Tue Jan 02, 2024 5:02 pm

I hope to see a bunch of spydies i have seen at last years Amsterdam meet. There are plenty of models i am awaiting i really really want from that day.

What was your favorite?

When you guys are talking about new designs, is there anything specifically about a design you guys are looking or hoping for?

Something practical? Something eccentric?

Shot Show is coming up, What are you guys excited to see?

Finished grinding and sharpening more CATRA blades for Dr Larrin, also some metallography. Looking forward to seeing his article about it. There you go again being a bad influence. You should know by now that most of us are weak and lack the discipline to resist fancy new toys. How about telling us...

Finished grinding and sharpening more CATRA blades for Dr Larrin, also some metallography. Looking forward to seeing his article about it. https://i.imgur.com/I5f9zf8.jpeg https://i.imgur.com/iKwriNQ.png https://i.imgur.com/VIN2n3s.jpeg https://i.imgur.com/L4gXOg6.jpeg https://i.imgur.com/zoaWnMn.jp...

the high toughness of AlOx, can also be a downfall because it will not break down and self-sharpen with use. AlOx simply goes to dull which further decreasing cutting performance. Dude! This post is particularly timely. Last night I was flattening/restoring some stones, and was pondering my Sharpma...

https://i.imgur.com/LD6pjka.jpeg Spyderco cBN Benchstone This is the coarser "400 mesh" side Yet, there is a large amount of 60um cBN grains which would be closer to ~250 Mesh or ~200-300grit depending on what grit scale is used (FEPA, JIS etc) It should be noted that all sharpening stone...

Right on, Merry Christmas and a Happy New Year 2024.

Scandi Grind wrote: ↑

Thu Dec 28, 2023 7:46 pm

Thanks for all that, Shawn!

Thank you,

Keep your knives sharp, but your stones sharper.

:D

https://i.imgur.com/trfRHwY.jpeg Spyderco Brown Ceramic under magnification at 600x Large alumina abrasive grains can be observed as the clearish white "rocks" Alumina/Aluminum oxide (AlOx) is naturally a clear, white color. Yet, elemental impurities in the AlOx crystal structure give us ...

https://i.imgur.com/czJGdKj.jpeg BD1N Z-Cut factory edge at 600x magnification. As discussed above, not many of the larger carbides survive intact all the way down to the apex. The edge measures 17° DPS which is a narrow cross section. Interestingly, the edge appears wavy, areas where the edge has ...

vivi wrote: ↑

Thu Dec 28, 2023 12:39 am

what equipment are you using for your images? I no longer have regular access to the lab that had the vhx-6000 microscope I used so I'm looking for something for my home.

A reflected light metallurgical microscope with trinocular camera port.

https://i.imgur.com/kEmdoJQ.jpeg Spyderco Z-Cut factory edge on BD1N at 150x magnification. Large carbides can be observed on the bevel and especially near the shoulder of the sharpening bevel. However, at higher magnification the larger carbides are not seen at the apex. Carbides seem to gradient ...

Bemo wrote: ↑

Wed Dec 27, 2023 9:37 pm

Wow that's a great picture Shawn.

Thank you.