Tag Archives: Video

STEEL K390 BÖHLER’S MICROCLEAN – UNCANNY BLADE MATERIAL.

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I have seen a video where someone is stabbing concrete with its Spyderco Police 4 to show how K390 is strong ! The blade of that famous knife is thin and this thinness is here for a purpose: Sal Glesser has decided to use the Police 4 plateforme according to his own desire but toughness and impact resistance may have weighed in on the decision. For once the Police is not especially aimed at the LEO but those ELU who use their thin knives hard !

“We make quite a few designs for the Law Enforcement market at this time, so the design for Police use is necessarily the case anymore, like it was in 1984. I designed the Police 4 to include what I would like in a knife, more than what a LEO might like. It’s still a kissing cousin, and large for most people. I widened the blade, enlarged the hole and selected a steel that I like to use. The design’s success in the marketplace is unknown at this time. But I get to have one. ” Sal Glesser.

K390 is not stainless. It’s a cold work tool steel which uses Bohler proprietary Microclean technology.  K390 has close to the same edge holding as A11 but is much tougher. Bohler’s third generation particle metallurgy contributes to the toughness of the steel.This steel will be hard to grind, finish and sharpen. Once it is sharp it will stay sharp for a long long long time. It’s CPM M4 on steroids which means K390 has more strength, durability, stability and wear resistance than M4 ! And I do love CPM M4.

Here is a video which confronts CPM M4 and K390:
https://youtu.be/TI53ziibeiQ

From Bohler’s commercial:

“K390 is quite simply the powder metallurgical cold work tool steel with the best properties for cold work applications available from BÖHLER at the moment. K390 MICROCLEAN was developed to meet the demanding wear resistance and compressive strength requirements of cutting, blanking and punching applications, for cold forming applications and for parts which are subjected to abrasive wear in plastics processing. Tool life can be increased by several hundred percent due to the outstanding wear resistance, high compressive strength and good toughness of BÖHLER K390 MICROCLEAN. These material properties enable our customers to make their production processes more efficient and consequently to reduce the price per part produced. Too hard to be machinable? Quite the opposite. The task of the tool steel manufacturer is to produce a steel which is, on the one hand, easy and economic to machine (with a hardness of around 280HB) and simple and unproblematic to heat treat, but which, on the other hand, has a very high hardness (up to 64HRc) and optimum performance in use. The secret lies in the powder metallurgy process. A very fine, homogeneous microstructure guarantees optimal machinability.

K390 owes its superior properties above all to the powder-metallurgical production process. The main advantages of BÖHLER MICROCLEAN steels over conventional steels are: • uniform carbide distribution • small carbide size • uniform chemical composition over the entire cross-section and length • virtually isotropic behaviour due to improved homogeneity and the absence of segregations.”

From Phil Wilson on the Spyderco Forums.:
“I have been using K390 from the start ever since it was introduced by Bohler and I got some small samples to try. A bit of history is that it is the European version of CPM 10V but not the exact chemistry (about 1% less V plus small addition of a few others). That is because the CPM 10V chemistry was protected by patent at the time. If you check the K390 data sheet it claims that the bit less V gives K 390 a little boost in impact toughness. It also can be heat treated at a lower temp. than 10v. So it is pretty much the same as the A11 grade but different in a few small details. It is hard to tell the difference between CPM 10v and BU K390 in the real world in my experience. I like both grades and they are the base line (along with Vanadius 10 and K294) from which I measure wear resistance. The 5 chrome is there to make them all air hardening among other things and does not contribute much to corrosion resistance. It is going to make a killer knife in the new offering and be another classic. Phil”

On my Urban, K390 has proven to be very tough. It is my main travelling folder. And it is a real wolf under sheep’skin. One of the little home test I got is by removing the metal around a bottle of wine’s cork. Most of the time, the knife edge is bent and shows some shining due to miss alignement but not with K390. The steel feels like plastic. On my three knives, the Pingo got the most stout blade and less pointy. This little knife is simply used very hard with zero damage to the edge: digging in wood, cut into staples, scrapping various paints and plastic. So far, even if the steel is not stainless, a mild patina has protected it from real rust.

So what do we got ? A tough blade which keeps its sharpness for a very long time. A forgiving edge which can be used by clumsy hands with no after thoughts.
The side effects are: the need of diamonds and ceramics to keep it razor.
Once convexed to me taste, I use white ceramic and some stropping just to get it mirror.

We definitively needs more knives in K390 !

 

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BFTP Fred Perrin Spyderco’s Native Review.

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Thanks to JD (Dinkmaker) I was able to read some of the very first knives review written on the Internet in the mid 90’s. More than twenty years ago, no digital camera but my video equipment and so freeze frames in low res.

The Native review has been the first one we had written with Fred Perrin. I had asked him which knife he would have liked to review and he had produced a black FRN Native he just have get from a blade show in the US. So we had started the chat and I had typed. We had good time laughing and bitching about so called knives gurus. Back then the Internet was starting to boost a lot of egos from many knifemakers able to steal ideas from other and promote them fast thanks to the web. It was also the time of the first forums and the first internet knives retailers. It was before amazon too.
So here is the very very  first review we ever had put on line on the old geocities site (2292). My idea was to depart from general reviews and capture Fred’s ways to express himself. I asked a lot of questions and asked him for stories and jokes. It was already my main editor angle: stories not description.
You can notice we were also talking about going in airports with short folders in our pockets and even we were featuring self defense as a possible use. It was a pre millenium and pre 911 time… Well it was another time long before any social network.

intero
But hey we were using animated GIF for some effects like nowadays kids ! 😉
Nemo 17/03/2018.

 

NativeFred

BLAST FROM THE PAST: SPYDERCO’S NATIVE
By Fred PERRIN
Master At Arm and Knifemaker directed by NEMO

These last 10 years I have used and tested (some would say abused) a lot of their models, for the simple purpose of writing reviews in many french magazines.

But for my personal use, I have carried and used :

  • Ladybug
  • Police
  • Mariner
  • Criket
  • Delica
  • Dragonfly.

Each time I have enjoy them a lot ! For example, I carry the ladybug for years. It’s my travel knife (you know airport controls…). It’s a perfect utilitarian you can have on your key ring. It’s also a good little weapon! Opened, I grasp it between the two first fingers, à la Wolferine’s claws but this is another story. Another example, my wife carries a Cricket since the 1994 Paris Knife show. (This little knife is also a really good folding weapon.)

Back to the Native. I have bought it at the NY Knife show for $40.00 which makes it one of the first price in the Spyderco collection.

But why did I bought the Native ? I am a knifemaker after all… When I need a knife mostly I build it ;-). First his name appeals me. « Native », for an European, this word is synonym of Indian, Sitting Bull and Geronimo… and I consider myself and my Gang as real Indians.

I immediatly begin to like this light knife because of it’s middle size, easy to carry and discreet (4 inches closed and 7 inches opened).

BLADE

The blade is a spear point with a really wide back edge offering a tredememous thrusting ability. The Hole is made “inside” the blade (at the opposite to the rescue for example), making a beautiful profile. The thumb is resting on the grooves on the back of the blade. No risks slipping at all . Out of the box, the Native is really hair popping sharp. My personnal test ? Remember the NY knife show with the cigarette paper ? I take the cigarette paper fold it for it to stand alone and i cut it in two ! I have used the Native in the kitchen, and for light chores. Resharpning is really easy and it gets really sharp again.

HANDLE

The handle is Zytel. I personnaly really the Web style engraved in the handle. and the access to the blade hole is really easy. I like the improvment made by Spyderco on their clip lately. The metal clip on the back of the handle is removable for lefties and easy to be adapted to be clipped on a coat pocket for winter days.

Now when the blade is deployed: The blade and the handle create to curves for the two first fingers. Dexter Ewing in his review got the right words to describe it. Anyway, it works great for thrusts and pulls ! Also the blade (if the lock would failed) won’t cut your fingers because the blade is blocked by the index finger.

I like to have the butt of the handle fits the inside of the palm. the handle is rounded at the end and fits confortable for pushing the blade. The lock placed in the middle of the handle is on the right place to close it with one hand.

SELF DEFENSE

I could really use the Native as my main defense tool. It’s a matter of trust in your tool and it comes from my own personal POV on using blade to defend yourself. Because as you know the only folding knife I consider as real fighting folder is the butterfly knife or balisong., consider this as a personal compliment for the Native. I have use the Native against a compact cardboard pack. (three inches cubic) Where I can thrust and slash to test my knives.

The lock is strong and the feel is great (hammer or Icepick) One of my favorite test… I throw the knife! Yes it was not design for that. But … this is my test. But it’s a less than a meter range throw. What I do is:

Speed draw, gravity opening and throw ! (Please don’t try it at home.) This is hard test especially for the lock of the blade. The Native passes it with full success. Good balance and sturdy construction.

CONCLUSION

Soooo.

For its relative low price the Native offers the excellence of a true little fighter and a great utility blade. I really like it . I also like his name !

Very good knife.

Period.

Fred Perrin

Fredeyes