HRC Database

Discuss Spyderco's products and history.
Wowbagger
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Re: HRC Database

#301

Post by Wowbagger »

sal wrote:
Thu Jan 15, 2026 8:49 pm
Strange thread.

sal
Well what else is there to do ?
You've already given us the world's hardest knives !
60 is Play Dough . Right ?

Well actually :
I modded / shortened another knife a week ago now . . . basic old Case CV . . . I had cut almost all of the blade thickness clear through using an abrasive wheel just leaving the least thickness at the ends of the slot right at the edge and another little thin bit at the spine . . . almost nothing . At this point I like to break off the cut off .

I was pleased to find It was springy , I flexed it over a few degrees and it came right back ; when I did break if off it went "ting".
Decently heat treated !

Has been holding up with a very acute edge for a week of cutting through various kinds of masking tape like tape on closed cell foam tubes around machine parts I have been unboxing on again off again at work . Edge still scrape arm hair shave sharp and bites the back of my thumb nail with enthusiasm .

There . That's my contribution to the knife hardness thread . On the scale it equals : Quite Good . :smiling-cheeks

Like this one but not this funny stainless steel stuff (old image stolen from one of my ancient posts in another forum) .
The one I modded was black scales , CV alloy and nice dark blue patina . I put ovals of black , rough rubber , gun grip tape up at the pivot end of the handle , jimmped the spine of the handle near the pivot with slots all the way across ; Spay blade removed on latest knife (I found spay doesn't have enough negative edge angle for my intended use ) and just gets in the way of grip if left in the handle as a second blade.
Yessss I know : "Congratulations ! You have reinvented the box knife ." But they please me .

PS: imagine if you will the same deal done on a brand new Para 3 Cobalt Blue G-10 SPY 27 .
Brilliant knife (box knife) . . . she takes care of the hard jobs ! ! !
Love that handle and negative blade angle ! ! !
and I didn't have to texture or jimp anything .
Try it !
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Steelearner
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Location: France

Re: HRC Database

#302

Post by Steelearner »

It's a link to a database with a good explanation of the process and what it means, including conclusions not to be drawn from a value.
https://www.reddit.com/r/spyderco/s/KNwbqzvjOh
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JNewell
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Location: Land of the Bean and the Cod

Re: HRC Database

#303

Post by JNewell »

Info on the GB 1 folder, originally from Sal via BF. I'm not aware that Sal ever made any further comments on the GB 1 folder hardness targets or yields, but I could have missed something. The BF link no longer works but Sal's original post should turn up if searched.
JNewell wrote:
Tue Jan 05, 2010 10:51 am
Here's what Sal posted on that:
Sal Glesser wrote:Our plan was about 62/63. Gayle Tested one and he said it was closer to 65. CPM-M4 can take the higer hardness if that's so. We'll be doing a sample testing next week.

sal
Red Leader
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Joined: Thu Oct 17, 2024 9:35 am

Re: HRC Database

#304

Post by Red Leader »

Steelearner wrote:
Sun Jan 18, 2026 3:49 am
It's a link to a database with a good explanation of the process and what it means, including conclusions not to be drawn from a value.
https://www.reddit.com/r/spyderco/s/KNwbqzvjOh
Thanks for posting this. This was the user that was posting all the fascinating results. And from your link, it looks like he is culminating all his and @Skylark427 's finding into a spreadsheet, which includes a lot of Spydercos and other brand. Thank you guys for doing this.

Speaking of which...looking at the Protech results, sure look like they are doing it right as well!
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Paul Ardbeg
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Re: HRC Database

#305

Post by Paul Ardbeg »

As already posted here, there is a user on Reddit sharing test results. He just released the results for Magnamax Mule.

I'm sure someone with more knowledge about hardness testing is on the forum and might want to comment 😉

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Red Leader
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Re: HRC Database

#306

Post by Red Leader »

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