Some Tech Questions

J

Jamesh Bond

Joined
Jan 14, 2007
Messages
1,760
Hi guys.
Ive searched and even called and emailed EKI but havent been answered.

I was just wondering:

1. Does EKI heat treat, or carburize (spelling?) their titanium liners, specifically where they contact the blade tang? If so, what is the RC hardness?

2. What angle is the tang ground to? Eg 8*, 9*, etc. im referring to the angle of the blade tang ramp where it meets the liner, when looking down at the open knife with the edge facing up. I understand that this angle is an important factor in linerlock construction, and was curious to hear what Emerson, being an engineer, had chosen. I am Referring to the blade's LOCK FACE. I am NOT referring to the side view of the lock, as referenced on the EKI website.

Been curious for awhile, so i figured i would ask here. If these questions cross any kind of proprietary line, please let me know. Simply want to satisfy my own curiosity.

Thanx for your time.
 
Last edited:
There should be some diagrams and the info you need in the "about" section of the website. Emersonknives.com

The office is closed until Monday for the Holidays. If the website doesn't have the info you need then I'll have to ask and get back to you.

Thanks
ER
 
The website doesnt answer the questions im asking. And i called a nice kid at EKI who couldnt answer about a month ago. Then emailed the same day. Hence asking here.

Thx guys. I appreciate your time. Happy holidays!
 
I don't know the answers to the OP's questions, but... IIRC, some time back (maybe even a couple of years ago), didn't Marthinus post a very detailed description of Emerson's liner lock and how it works, including drawings? Somebody did. I shows up from time to time in liner & frame lock threads. Might not have been Marthinus, but I know I've seen and read the thread several times. Might be worth some time spent searching.
 
Thanks dalefuller.

I have read tons of Marthinus's posts on locks, regarding these exact matters, which is precisely why i started wondering about the specs on Emersons. Never saw anything specifically related to EKI.
 
The thread contained some specific info from EKI about his three-point lockup and why it works. It also had some pix of a failed liner lock. IIRC, there was some discussion of the specific angle for the blade tang and why it was necessary. Wish I could remember more, but those are the parts that stood out to me. Steve Rice (STR) used to talk a lot about liner locks and angles, too. Haven't seen him on in a while, though.
 
Correct. Sorry i should have been more clear. He does reference an Emerson and mentions the three points, and the necessity for the angle when viewed from the side. Not my question.

When he references the lock face angle, which i am referring to, he is referring to Bob Terzuola's description of the optimum interface angle to ensure correct lockup with no slip off the ramp. Does not say what Ernest Emerson uses for his.

Again, learning so much about the intricacies of linerlocks, including from STR, is exactly the reason im asking specifically about Emerson knives. Ernie is an engineer, so naturally i am especially curious what his views are.

Thx.
 
I won't be able to get a definitive answer until after the New Year. You can always measure the angle by taking your knife apart or maybe someone here can. As far as carburizing the face of the tang I'm not sure. I could give you my guess but that would be pointless.
 
Thx ER.

I highly appreciate the personal attention you provide here. Cant express it enough. Ive been wondering forever, so time frame is a non issue. Enjoy your holiday season. I look forward to learning more whenever its convenient for you.

PS. The original question was about carburizing the titanium liner face, not tang face. I also edited the post for clarity.

Again,
Thank you all.
 
I understand the blade tang angle thing being a mystery. Tho it would REALLY be cool to hear Ernies philosophy and personal choice.

But....

500+ views and no one, including EKI, can simply answer if the lock leaf is hardened? ? ?

Just one last bump. I wont bother you guys about it anymore.

Thx again.
 
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