Tag Archives: Convexing

Benchmade 200 Puukko – Call me Snake.

This is the first Benchmade’s review for a long time. Why ? Not because of the quality of Les De Asis company’s products but because I was not really excited by their production in the last decade after a huge love with their AFCK back in 90’s, and also with Nimravus and all those blades in M2HS which is a tungsten high speed steel, the granddaddy of CPM M4.
I still got a AFCK in M2HSS and browsing that blog, you will find it here.

So here we go, two words has caught my attention on that new Benchmade: Puukko and CPM3V.

“CPM 3V is a high toughness, wear-resistant tool steel made by the Crucible Particle Metallurgy process. It is designed to provide maximum resistance to breakage and chipping in a high wear-resistance steel. It offers impact resistance greater than A2, D2, Cru-Wear, or CPM M4, approaching the levels provided by S7 and other shock resistant grades. CPM 3V is intended to be used at 58/60 HRC in applications where chronic breakage and chipping are encountered in other tool steels, but where the wear properties of a high alloy steel are required.” Source Crucible.

COMPOSITION
C Mn Si Cr Mo V
0.80 0.30 1.00 7.50 1.30 2.75

To quote my friend Max Wedge:
“3V loses 1/3 of the toughness going from 58hrc to 60 hrc (still 1/3 above A2 at 60 hrc, and A2 is indestructible… almost). Both 4V and Cruware start to shine around 60-62 Hrc… so, 3V for choppers, 4V or Cruware for slicers, Cruware having best corrosion resistance ( trait appreciated by soldiers & foresters)”

So this tough short blade made of chopper steel is at a very good bargain !! Let see what it is all about.

The leather sheath is beautiful even (if there is a loop in the stitching… I will upgrade it into a kydex for pocket carry.) and cleverly designed as a dangler. You can remove the loop to transform it into a classical sheath.
There is a place for sparkling rod in the Bushcraft fashion. I don’t care about carry a knife of that size attached to my belt. I prefer to have it inside my pocket or my bag.

The blade is an eye candy for some reason it reminds me the small SOG Seal Pup knife with no false edge but that’s me… Is this a Puukko ?

That handle is made in some kinf of thermorun… but it is rubberized Santoprene is a soft, non-hygroscopic elastomer which exhibits excellent surface appearance, a durable soft-touch feel, excellent colorability and excellent “processability”… made by Exxon.

It is made from underground forgotten dinosaurs and jurassic biomass aka “petroleum” hence the look of scales on it ?  Because that handle looks like some sort of snake or cold blood creature. I love it.

Now is this a scandi ground blade ? Nope. There is a secondary bevel. Is the knife sharp ? Yep, very sharp but could be better. Later/soon on that.

It is a hidden tang construction and you can see the steel in the lanyard hole. This knife is solid as CPM3V is really tough !!
Hidden tang are great when you work in cold weather, protecting your hand from a frozen steel.

That blade is short but handy: it asks to be used hard like… Snake Plissken’s hard actually ! Because 3V is magic in toughness ! 😀

Compared to a Mora or the Urban Hunter (from Pekka Tuominen) the Benchmade 200 stands its ground.

Here are two vision of CPM3V industrial use. Ed Schempp Spyderco Tuff is pure business. So that BM200 should be even tougher as a fixed blade.

Teamed with a Manly Wasp, you got a great combo.


But a puukko (in my book) needs a thinner edge and it is time to scratch that blade to de-shoulder all that. Diamonds do scratches but then scratches will be polished later. Thinner convexed edge is destin to go deep and get twisted; this is a tough steel.

Diamonds, ceramic and leather. Who needs more ?  CPM 3V is really like chewing gum you need abrasive medium to form that convex edge.

A some compound with the leather stropping is mandatory to erase those scratches

See ? Now it is convexed and will be smooth on whittling wood. No worry for that edge stability again 3V is perfect for that use.

Standing next my Serrata which is my only naturally serrated knife.

So now, I just need some white ceramic to keep it sharp and some stropping. It is ready for testing. The Puukko shape is more for me a “Coutelas de Rahan” shape actually (French people will understand but here is the link: Rahan in Wikipedia.
making this little tough knife very appealing to bring it everywhere.
Everywhere is a good point to start. 😉

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SLIVERAX — ELEGANT DREAMED ENGINEERED KNIFE – ACT III: Using.

20171122_150203-031772969397.jpeg My Sliverax is a dancer. you can open in a lot of different ways. The flipper is the first. The thumb with the hole. The middle finger with the hole. The ring finger while holding it handle first and some kind of gravity opening: just a flick of the wrist and “Schlak!” it is ready. So there is a lot of way to waltz with that folder hence her name: “Dancer”. This is bringing the fun factor to high rate. 20171124_163414-01208185727.jpeg You can see I have mounted my Ed Schempp Bowie clip for now. Now that I feel confident with S30V heat treated by Spyderco, since I have play with the Nilakka (Taichung) and the Wolfspyder (Golden), both radicaly scandi ground knives, I have decided to give the Nilakka a very very thin convex edge. The first step was here. But then I have decided to give sandpaper a try and work on thinning the factory edge not only de-shouldering it.

So it’s very simple: P800 SP on my old leather belt to thin the edge, then white ceramics (a lot) to turn it into mirror. One hour later, I got a incredible performer ! On wood: it goes deep and smoothly. You got a lot of control. Of course it has been used daily in the kitchen and on meat preparation and guess what, the flipper eventually is not a problem for board cutting. On plastic and wood, I have twisted the blade inside and no harm has been noticed to the edge or the mechanism. I have used it hard at full grip and got full confidence in it in hammer or reverse grip. Like on the other compression locks knives it’s so easy to close it and put it back in the pocket, preventing any way to harm yourself or the others. It is especially great when working around animals like horses for example, when you want your edge to be out of play as soon as possible. I have also the chance to compared it to my ZY0562CF which is an excellent flipper with a sure fire every time. But it’s a knife much more heavy and less elegant, more rugged, full of screws… Another philosophy in folder making that I enjoy also, but the Hinderer design is more of a Toyota Landcruiser when the Silverax is a BMW Serie 4. I enjoy both but the Sliverax offers a very light solution for high perf. I also like the fact I can easily check/ have access to the pivot to grease it with a micro drop of nano oil BTW. In the woods , I was able to whittle a lot without any hot spots on the handle. The clip did not bother me in that matter. I have also rounded a little more the spine to feel confortable as my main technic asks for my thumb to push there, giving les stress to the pivot. Also I place my index on the flipper most of the time choking up the blade. Despite the absence of choil, I have not cut myself. Oh and I really enjoy the fact their zero jimping. Most of the time I’m obliged to file them a bit on the corner to have them to my taste. Here no need for jimping and as a tool the Sliverax is perfectly anchord to my hand. The CF/G10 material is working perfectly without chewing my pants. After EDCing the Paramillie in 52100 it’s a pleasure to get the benefits from stainless steel researches and use the knife with zero concern about rust. It’s a luxury I am rediscovering. I can pocket my dirty knife and I don’t mind. I feel like a man making fire for the first time with a gaz lighter instead of some flint… Then back home it’s very easy to rinse under hot water. It can go in my denim front pocket to dry. On of the main characteristic of the Sliverax is the long edge in such a compact design. i cannot remember a knife which has given me that impression, especially in a folder. I love my Native 5 for example but the choil “eats” a lot of blade length. This length available is another luxury. You can of course pushcut but also keep in mind that any saw motion will be very easy thanks to the absence of choil to trap the matter you are cutting. So the Sliverax is great, providing a long edge easily from a light and wasp shaped handle, giving a lot of cutting performance for a SUB 4 inches knife. More to come soon as I always got new things to write once it is published…So this is a first draft but this week end I’ll be in wood … 😉 20171123_151314-01264186372.jpeg