What's happening in the David Mary Custom shop?

BlindMouse2of3 said:
How long does customs normally take you fine gentleman. My riverhawk was alright stateside but no matter how many times I refresh my browser my rainy day still hasn't cleared. I can't recall the last time I was this unhappy waiting on a knife.... And I don't even get to keep it.

Luckily my riverhawk hasn't but me yet...
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Customs had my last one over a week. David put a word in when I let him know of delay. Frustrating when he builds them and ships them fast, then they sit there. Not like an xray wouldn’t show what it is quickly enough…
 
David Mary said:
Ten days from ship date. Any longer than that, and let me know, I'll file a ticket.
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You got to start sitting on tracking numbers for a week the suspense is killing me 🤣

DocJekl said:
How does that song go again? Ooops, I did it again. Tonight. The stuggle with front/top flippers is real.
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I really like the 8" prybar for a fidget toy. Haven't cut myself with it yet. I did sink my crucarta pm2 a 1/4" in a finger shortly after I got it. Took a good bit of a tube of super glue to stop it. Oh and have come close a few times with the native chief M4 once or twice. Just have to remind myself it's not a toy.
 
BlindMouse2of3 said:
You got to start sitting on tracking numbers for a week the suspense is killing me 🤣



I really like the 8" prybar for a fidget toy. Haven't cut myself with it yet. I did sink my crucarta pm2 a 1/4" in a finger shortly after I got it. Took a good bit of a tube of super glue to stop it. Oh and have come close a few times with the native chief M4 once or twice. Just have to remind myself it's not a toy.
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I checked- it was 20 days from David mailing it to me getting it. Long wait but worth it. Crazy what they let across and what lingers.
 
No reason for customs to hold it that long. So ridiculous. As was said before, David ships so fast and then they negate that with making you wait.

It’s really frustrating when it’s something coming from CONUS and you see it sit at 1 particular hub. And then tracking stops for a while.
 
Shop reception is hit or missed but the pics seem to be uploading this time yay. From the time I started uploading them to the time all are uploaded I managed to type all this including having to correct my idiotic iPhone on which I disabled predictive text but it still wants to use the most idiotic spelling replacements for words that make no sense for what I was typing

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Okay here's what I didn't tell you before. For R&D, I ground this MagnaCut WAY TOO THIN and wanted to see what it could handle. I did this upon arriving at the shop:

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It was ground to well under .008" behind the edge, at 61 RC. A brief session of batoning and careless edge alignment chopping led to a pretty big chip.

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The pics I posted a few posts ago are the same knife after a regrind and corrected geometry. It is now .016" behind the edge, and that is the thinnest I will go on something like this meant to chop. For reference, the largest MagnaCut knife in the world was ground to around .020" behind the edge, and was chopping these same logs in half without damage.
 
David Mary said:
Okay here's what I didn't tell you before. For R&D, I ground this MagnaCut WAY TOO THIN and wanted to see what it could handle. I did this upon arriving at the shop:

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It was ground to well under .008" behind the edge, at 61 RC. A brief session of batoning and careless edge alignment chopping led to a pretty big chip.

View attachment 2043302


The pics I posted a few posts ago are the same knife after a regrind and corrected geometry. It is now .016" behind the edge, and that is the thinnest I will go on something like this meant to chop. For reference, the largest MagnaCut knife in the world was ground to around .020" behind the edge, and was chopping these same logs in half without damage.
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Way to throw it around and see what you're working with.

Posting it here helps me understand the nuance and influence of geometry better, as I learn better with a visual-aid type style.

In your example, grind geometry was/is key, and it's impact on the edge (pun intended) for desired use outcomes undeniable.

Thanks for sharing the photos of a damaged knife you made - I think it takes some courage to do that, to show the work and learning that goes into your eventual complete blades.

I'd use this design in most any steel...great looking user, David.
 
I'm starting to see similar stuff popping up
What you are doing and showing is verifying what it's limits really are.....
It's AWESOME, but still a steel, and it has it's limits.
Every steel has it's use, and place.


For additional data points.....

My last SYKCO I dont remember it's name? DT12orsomething it's a large Bowie-like knife. It was a slab at .056" bte

David is saying his big one was .020" bte

The 52100 vs MagnaCut.

(That's kinda a soup of information )
 
Hurrul posted my thoughts very well. I was thinking about that last night at karate class (my daughter's not mine. I'm to broken for that). It started to kind of bug me since I pay good money for a lot of knives with uneven grinds. I have some that by the time you get 20 DPS they are off by 1/8" or better. Can't help but wonder how it'll effect long term. Also makes me wonder how much a knife needs behind the edge in a steel that is more of an abuser steel like 1095, 5160, 8670, ect. Where is the chart that says you need this for this application and this for a safety margin if you are doing stupid things. Or rather if your hands are frozen and you are trying to baton or chop. Your example of "careless edge alignment" translates well into loss of fine motor skills.

As a side note I cleared customs this morning 🥳
 
I didn't show it here, but I just did a handle reshape and regrind this week for a small S30V fixed blade knife for someone. I couldn't believe how ridiculously thick the edge was, not to mention blocky handle with hard corners all over it. This little 3" or so hollow ground knife, and the thickness behind was easily .05". I was in disbelief. Good luck cutting cardboard with that.

Here's before and after.

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Before 2.jpg

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Do you have any more of that red handle material you just used? Seriously thinking I need to send you my firecraft 7 for a makeover.
 
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