Tag Archives: Michael Janich

Yojimbo2 as EDC Workhorse ? Don’t be shy !

After using the Kapara all this summer I have decided to go the opposite way with a straight edge and flat handle !
And having a lot of fun with my Yojimbo2, I have decided to beat that dead horse again:
“This knife has been designed for Self Defense, It would not be a great EDC, especially in the kitchen.”

All famous SD tools were issued from agricultural items, from nunchakus to kerambits and since when straight sharp knives are not useful in the kitchen ?
So let’s broad the specter of usage of the good old Yo2.

The handle is flat and broad.
This is a real plus for indexing the knife but also to hold it by pivot area between the thum and the index. A very commode grip when carving pumpkins or just cutting on a board.


There is a hump on the handle’s back which fills the palm of the hand making the grip secured even with very wet hands. You can notice the same shape on the Kapara‘s handle.
In fact despite being flat the handle is almost all in curves and
looking at the Yo2, only the very edge is straight.



The blade is short thick but broad and keen. It is shorter than a Kapara’s blade which got almost the same handle length. But this a very powerful blade, able to withstand forceful pushcuts.
For that matter I have rounded the spine on mine. Personal preferences since my first Sebenza.


You can put all your weight on the spine to cut right through any matters. The wide blade goes through like in butter.
Also the Yojimbo2’s blade got a certain heft. It is thick on the spinde and feels hefty hence the sensation of power when cutting. This is not minor in the pleasure of using your tool. Thank kind of weight behind the spine makes it ooze of power.

The high blade can adopt the thin geometry needed for easy slices into cherry tomatoes, a simple chore which can be tricky and is an excellent test for sharpness. Tomatoe’s skin can be tricky and rough or razor edges are their best nemesis.
I also heard a lot: “The tip could be fragile.”

For the record, the Snody/Janich’s Ronin and first Yojimbo were much more thin on their tip. The Ronin being made of VG10, I had managed to break it.

To eliminate any risk I have chosen a stronger alloy on my Yojimbo2: CPM M4 and so far the needle tip is as pointy as Day One.

For that kind of jar, the easiest way to open it is by making a hole right in the middle of its cap. When I want to use the jar again, I will use more force or if stuck a twist of a leatherman’s flat screwdriver under it lips to balance the pressure.
With the Yo2, I have been able to remove staples in wood planks and even drill into hard wood which mean torsions for the drilling. No certain I would try that with S90V but S30V heat treated in Golden is strong enough for knife shores. The CPM M4 used here is just peace of mind even on thin sharp knives. Gayle Bradley has also chosen that steel for the exact same reason: strength.
But a knife will never replace a screwdriver apart perhaps for the infamous Ed Schempp’s Tuff.

Once broken, I have been able to regrind the tip of the Ronin which has been one of my favorite big little fixed blade.

The blade shape allow the Yojimbo2 to cut on a board but also the Wharncliff shape protect the edge from any contact with plate’s ceramic. Only the pointy tip get in contact ! It will make deep scars in your wooden planks if you are not careful.

Wharncliffs are great for whittling and also rope/string cutting. There is no belly for the cut material to run away.
They will be less handy as skinning knife where belly blades are mandatory.

The blade choked, only the tip remains for delicate work. In that matter it is as good as the Paramillie2.

The absence of real choil is not an issue. The place of the thumb on the “hump” gives a lot of controlled power.
You can also notice than despite a single spot, I have not been able to get a real patina on that CPM M4 blade.

In conclusion the Yo2 is really a great workhorse and should not be restricted to Martial Bladecraft. Also the more you use your knife in everyday life and the more your build your motor skills about deploying and closing the blade. The heft of the blade helps a lot for that. Use your Yojimbos hard and you will be surprised how they can handle any tasks !

Yojimbo2: swapping the blades back and forth.

My project when I had ordered the Jade Yojimbo2 was to swap the blades with my Carbon Fiber / S90V Yojimbo2, to make a vinegar patina and enjoy a unique CPM M4/ Carbon fiber Yojimbo2.
Yeah well…
I have done it but the patina.

Here is the result. But you know what… As great as the CF handle is… this Jade version got something really special. I love the smoothness I have obtained by sanding the natural G10 and the action is smoother than butter.

So I have swapped it again. It was very easy.
What I can notice about this “sterile” experience is how well adjusted those Golden spawns can be. In both configurations the action was smooth as glass and the blade perfectly centered. It’s a joy to dismount and put back together.
So it’s just me, in the end, seeing the deep carry clip going esthetically much better on Jade natural scales and the heft of the BladeHQ special edition being more appealing to me. Also these transparent slaps help a lot for a non threatening aspect of a very pointy knife. I have already used twice in public place without being noticed…
So back to the start after some nano oiling and putting some fresh blue loctite on strategic screws: pivot and clip. Great knives easy to maintain clean even in the inside.

Spyderco Yojimbo2 C85GM4P2 CPM-M4 The Jade Warrior.

This is a bud of an article about the BladeHQ exclusive Yojimbo2.

At least there is picture.

Story will come later in multiple update.

I have reviewed the Michael Janich’s Yojimbo2 many time here.
And I have been waiting for a tougher alloy for a long time: CPM-M4 is one of my favorite steel.

Why ? Because it’s take a razor sharp edge and keeps it, it’s a tougher than stainless steel super steel and its edge stability is better: no chipping or warping in my uses. Of course it will get stained but that is the part of his multiple charms. This is a steel used in blade competitions and Gayle Bradley is a fan of it.

The Yojimbo2 design asked for a very thin point and a stronger, tougher steel. M4 is a must if you want to use it (like myself) in everyday chores… hard !!
Because such great ergos ask for hard working.

Compared to my previous YO2, the closing sound “TICK” got a much higher pitch than my S90V version. I had noticed that kind of higher pitch on another super tool steel: Maxamet.

Does it mean the steel is harder ? Will see.

So stay tuned!

I have changed the OEM clip for this one.


It’s a shortest deep carry clip.

The Para 3 in Maxamet got the same high pitch TICK.

Dirty blade ready for some chores.
Both knives are excellent EDC. The Yo2 offers really powerful cuts on wood.
A word which comes back a lot with my Yo2 review is “power”. The heft of the saber ground hollow blade and the confortable thick spine is a call for pushcuts and “very light” chopping. You will see what I mean in a few photographies…

Deshouldering and starting to get a thinner edge. The factory edge is excellent though.

“Ghost” and “Jade” together: same materials.

The handle lengths are different just because one is standing on its clip.

Push cuts are easy.

This is the kind of “very light” chopping cuts which are made in blink of an eye.
The Yo2 is a great trimmer. The edge bites deep and the straight edge won’t let go.

It’s very efficient !

M4 steel erases any fear of breaking the thin tip easily but I do respect too much my knife to try any lateral forcing. At least I’m no afraid to use that blade tip hard !

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Rinsing and cleaning the blade in a spring stream. No real patina so far but soon it will come. M4 get darker in a slow way on my experience: no hurry !
But that Jade handle goes so well with natural environments…

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There is a lot of charm in the Yo2: the heavy blade smooth action, the straight edge power and the great ergos ! Nobody seems to notice it while used in a restaurant, the Jade helps a lot to make it less a weapon and more a tool.

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Yojimbo2 vs Paramilitary2 — Face 2 Face !

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I got two requests for writing that little comparaison hence a lot of users are hesittating between those two radical designs.

My Yojimbo2 is a special edition as is my Paramillie 2. Both got carbon fiber handles. Both are made in Golden, Colorado, USA, Earth. Both are second generation.

The Yo2 has been designed by Michael Janich and The P2 by Eric and Sal Glesser. Both got compression locks and inhouse system invented by the Glesser. The Yo2 got an S90V blade and the Para got a 52100 ball bearing blade.

The steel in those exclusive runs are totally opposite. S90V is a powder metalurgy alien steel named CPM420V in the previous Century. It is like some kind chewing gum alloy which refuses to let got any particules even during sharpening when 52100 is more of traditionnal old timer bladesmith steel of choice with carbon and a pinch of chromium. S90V got carbid of vanadium and chromium and more than 2% of carbon. 52100 got 1.2% of carbon. They are on the two opposite sides of the famouse best steels spectrum. S90V will stay sharp more than 3 times longer than 52100 if used on abbrasive material like cardboard. But 52100 will be easy to reach razor sharpness. S90V loses its razor edge very fast before to keep a plateau of working edge for a very very long time.

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Both knives got a convexed edge, it was a bear to obtain it on S90V.
Both got very pointy tips fir a equivalent lenght.
But the Yo2 blade is saber hollow ground when the P2 is full flat ground.

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On wood I have already noticed how great the Yo2 was for making sticks.
It has a very confortable handle for hard use and the keen edge got full power from the choil to the tip. Also the thick back helps a lot for pushing with the thumb.
Try the Yo2 on sticks: it will amazed you. But if you need some belly, the P2 will be obviously better. You won’t take the Yo2 for an hunting knife at all.

The Paramillie got this wonderful performance and control the full flat ground can provide. It is in his element: reliable and steady.
But the Self Defense knife is not the last in performing camp task. Do not underestimate it in that mattet as Michael Janich always advocated to use his knives to get used to their ergos and the way you carry them on your person.  the more you do it, the more you train to to draw them in stress situations.

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But in pure quick drawing, the Paramillie got a serious avantage: you can easily spyderdrop it. It is opened in a breeze just by drawing it by holding the hole. This is fast and actually faster than the Yo2 which required first to be clear from the pocket.
Both knives are equally smooth. The YO2 got a little more momentum because the blade is heavier. But, in my book, the Self Defense knife is beaten by the utility knife.
The Yojimbo got also more presence than the Paramillie2,  it is like one of wolverine claws and not really sheeple friendy.

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So really it just a matter of look and taste if you need to choose between them.
Both a high performance folders, with great locks, great ergos and an attention to detail breed in a second generation design. Both will find a way to be very useful in everyday  chores. They are false brothers but you know…
Now, the world don’t move to the beat of just one drum,
What might be right for you, may not be right for some……

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Spyderco Yojimbo2 – Mission: Italian Salad.

This is my first post sent directly from my smartphone. As I’m looking for easier way to publish on the blog.
It was made at the occasion of preparing a quick lunch with mozzarella, salade and tomatoes with my Yojimbo2. Nothing fancy really but a very sharp and easy to clean knife is mandatory.

In the kitchen, its first use is to open bags. Many times you won’t find a pointy knife in a kitchen drawer so the sharp EDC like the Yojimbo 2 is handy to pierce plastics.

Another great test for the edge is the tomatoe skin. Tomatoes are fragile fruits and their skin can be tricky. If the knife is dull it will squash the tomatoe. You need a sharp toothy edge for best results. Chef goes very fast for that matter. Fast means sharp fresh edge.
The S90V has been refreshed yesterday after whittling with Ghost.

The last part was the mozzarella balls to cut in loaf. It’s sticky on the blade and very flabby.  You need a broad knife to work on it. A Chef knife could have been handy but the Yo2 was able to deliver its task.
Again SD knives can be used for EDC tasks especially kitchen unless they are a Kerambit. 😉

SPYDERCO MILITARY C36PIN PART III: WHITTLING WITH GHOST.

We all know that the steel is only 30 percent of the equation for a great blade. And I’m not talking about the whole knife — ergonomy, lock quality, sheath, clip —  just the blade: the main “Matter Separator” to quote Sal Glesser.
Apart from the Steel they are the Heat Treating, the Grind and the BET “Behind the Edge Thickness”.
And also the quality of the edge coarsed or polished change the way the blade will cut in materials.

Wood is a fibrous material which depend of its grain and freshness when whittled.
Again, a rabbit to skin or a cardboard box to dispatch will behave differently under a sharp edge.
And a Self Defense designed knife will not need to be a Scandinavian Grind for example…

So I have decided to gather the Yojimbo 2 (Black), the Wolf Spyder and Ghost to practising my scales and mastering the rudiments of whittling on a hazel rod which has been drying for a month (since the Lil Nilakka Review actually).  My whole idea was to see and experience how the very different blades grind and shape would behave and eventually adjust Ghost for better whittling.
I have not used my Nilakka as it is a game changer. It’s too hard to reach its performance. (The pictures has disappeared because Photobucket has changed their policies, I will need time to create new links, sorry for the convenience…)
Also I’m a lost cause in whittling compared to what my father was able to do as a kid when he was whittling his own toys but I do have affinities with wood as my grandfather was cabinetmaker and my other grand father was clogmaker.

I had noticed back in the 90’s when I owned a Benchmade AFCK in ATS-34 and on in M2HSS that wood would be almost “patined” differently depending of the grain of the steel. M2’s cuts were leaving a very soft surface compared to ATS-34 which was a more aggressive cutter. I have then found that one of the most expensive wood chisels were made in M2 High Speed Steel.

The Wolfspyder is in her element here. Since I have sharpened her back to razor, the scandi grind cut deep and with ease in the wood. This little knife is purely amazing when it comes to carve  deep or caress the rod. The sturdy design is asking to be used hard and the big chunks of wood were flying. It is a pocket beaver ! (OK no more kinky innuendo, pardon my French…). In pushcutting perpendicularly , the Wolfspyder was the more aggressive.
Again, S30V as heat-treated by Spyderco has proven to be a great “all terrain” steel as its edge was not dulled a bit. I’m surprised about the way it kept a perfect edge after all the cuts in a dirty bark and hard wood. Hairs were still flying of my arm. (I heard so much about it losing that very sharp fine edge beause of its relatively big carbids…). It will not be the was with…

Yojimbo 2 Sprint Run was another surprise. First I need to clarify that I had the edge “unshouldered” to be thinner. S90V is a bear to sharpen it feels like “plastic” and without diamonds it is time consuming.
But here it’s the ergos and geometry which made a difference. I was able to cut big chunks of wood with ease. The blade was going deep and my thumb got plenty of space to push behind the edge.
Michael Janich proved it: its Yo2 straight edge keep the pressure on the material. His design was primary made for cutting clothing and flesh in a attempt to keep an aggressor away but it has always proven to be a great EDC for mondaine task. Now I know that bringing the Yojimbo 2 in the woods won’t be a fashion faux-pas. This incredibly solid folder in the right hands can be a great wood processor.

Now I was surprised to notice how my razor S90V edge dulled. I mean, it was still in great shape and has reached the level of a “working edge” but it was not a reliable razor anymore. Twenty seconds on white ceramics and leather and it was back to Vorpal. S30V did not have that issue and of course not CPM M4 of…

Ghost new convexed edge proved to be able to cut deep with a lot of control and also to remove bark with ease and no pressure as pictured. It was fun to use. CPM M4 got also that tendency to leave the wood’s fresh surface very smooth to touch. I could go on for hours but it needed some twist and home edjustment to ease my thumb sore.

The Wolfspyder’spoint is made to drill. It is thick solid, sharp and you can use all your force with no after thought. It’s not the case of…

…The Yo2 ! Back in the 90’s I had broken my Ronin point drilling in wood. It was a much thinner point and I was really stupid. So I was very careful with the Yo2. It’s clearly not its strong point (pun intended…) but I did not snap it.

C36’s pointy blades, first made of S60V (known as CPM440V) and then of S30V, are known to be relatively fragile but CPM M4 brings much more toughness to the whole design. Perhaps the CPM Cru-wear Sprint Run was even stronger but, anyway, I got zero concern with Ghost which was able to drill the hazel rod easily.

Eventually, the most important home improvement has been to rounded the blade’s spine. Of course the Sebenza is king in that matter, also the Slycz Bowie.

Sandpaper was used for that matter and if the edges has been removed I have not tried to round it completly but at least to make it much softer under the thumb and I don’t strike rods for sparks.

In conclusion, don’t be afraid to adjust and improve your expensive EDC knives to your own uses and tastes. My first attempt has been on my Paramilitary 2 handle. But a knife is a personal tool and it needs to fit you perfectly. Just take your time. Don’t use powertools and risk to heat the blade and ruin the heat treatment (done that in the 80’s…), just go slowly. Also don’t breath G10 and Carbon Fiber dust. Use a mask or do it under the tap. It would attack your lungs badly. Anyway my EDC have really been enhanced by all those little changes and Ghost is no exception to that thumb rule (pun…).
Enjoying your personal tools is always a joy when they are based on great designs in the first place.

False Brothers — Wolfspyder and Yojimbo2

Like Apollo and Soyouz, those knives are different but got connections.
Both are Spyderco folders with no hump, no choils, both equipped with compression locks, nested liners, spoon clips and radical blade designs.

Both are made to be carried as EDC. Not too big but not too small with a blade around 3 inches / 9 cm.
Their looks are reflecting their designer’s minds and crafts. Ray Mears is a teacher in bushcraft and Michael Janich is a teacher in martial blade craft.

Both are best carried tip up and you need to pull on their tails to unsheath them. They leave a similar print in and especially out the pocket.
Also both got a consequent integral guards. Only the Yo2 got its guard double with a nested liner though.

The main difference is the way their respective blades are ground.
A scandi grind against a saber hollow ground: the Yin and the Yang of cutting perfs.
Eventually the Yo2 is much easier to get sharp as you got less material to remove. But the Wolfspyder scandi’s once sharp is a pleasure on wood works for very precise controlled cuts. In that area, the Yo2 is more like a wild hungry edge waiting for a firm hand to stay on the course.
The thick point of the Wolfspyder is made to withstand drilling in hard wood.
The shard of the Yojimbo’s point is designed for deep penetrating thrusts… to the bone.

But in the end of the day, both knives are very pleasant EDC companions. Their ultra solid locks make them safe to use hard with no after thought. I was surprised how they can be adapted to mondaine chores with their own characters. Both got great ergonomics improved by a wide guard. The compression locks are not hurting my hand like on my Paramillies and the absence of jimping and hump is a plus in my book when you need to extend your thumb on the back of the blade for power cuts.

Yojimbo’s C85GP2 and C85CFP2 and a Ronin.

Following my first glimpse on a the Yojimbo Special Run of 2015 , I present you today the classic version of the Yojimbo: G10 handle and S30V steel. There is no difference between the knives but 4 grammes in favor of the CF version (110 vs 115).

Nemo Knives Review Yojimbos

The blade got the exact same length (on the photography, the Yo2 on the right is resting on her clip hence the parallax…). I have also found the detent to be harder on the S90V run but who minds ?

Now the main difference is the steel: S30V vs S90V.

Quoting Jerry Hossom on the knifenetwork.com :
“S90V contains 9% Vanadium. S30V contains 4% Vanadium (originally it was planned for 3% and thus the name). Vanadium carbides are VERY hard and provide a lot of wear resistance. On the flip side of that S30V was designed to be very tough; it resists chipping and breaking. S90V was designed to be very wear resistant, so it’s really a tradeoff. If you’re very careful with your knives, don’t toss them in the sink or hammer them through hard beef bones, S90V will do very well. If you’re rough on a knife, S30V will be a better choice. I’d likely choose S30V for larger knives, because they’re subjected to greater stresses. S90V is certainly fine for smaller knives. ”

So how S90V will behave on EDC chores with the Yojimbo blade particular shape especially its very narrow point. I remember the same kind of exchanges on the forums about the point of the CPM 440V (S60V)C36 military and our request to see a Millie with some strong tool steel hence the desire for CPM M4, CPM3V and CPM Cruwear version.

Back in 2002 I got the chance to own a Ronin made in VG10. The Ronin was a Mike Janich and Mike Snody collaboration on a SD fixed blade and more precisely a neck knife. I used mine for every day chore until the tip get broken and I was obliged to regrind it.

Here is my 15 year old Ronin next to the Yojimbo.

What I love in this design was the way It would cut on hard material without compromise the edge: only the point was touching the plate for example.
Then as S90V is known for its wear resistance, I should be able to keep the point sharp for a longer time…. And time will tell.

Some words from Mike Janich taken from the Spyderco Forums:

“Hey, Guys:

Thank you all for your comments and enthusiasm regarding the Yo2. I am very pleased to have it in production and I’m thrilled at the way it turned out.

I wanted to share a couple of fine points regarding the design. Like everything else I do, I like to explain why. You are free to agree or disagree, like or not like, but at least you’ll have the information to make a decision.

With regard to the not-fully-exposed Spyderco hole, I wrestled with various options on this during the design. I did not want to do the large index-finger choil of the original Yo because it narrows the grip too much in that area and starts to force the hand into a saber grip. The goal was to keep the closed knife as narrow as possible to preserve access to the pocket.

I had a similar challenge when I designed the Be-Wharned. One thing that I learned during that process was that the natural hand position for a thumb opening is typically not with the plane of the handle completely flat. Most people naturally hold the knife palm up, but with the knuckles at about a 45-60-degree angle to vertical. That means that your thumb also indexes the hole (or stud) at an angle, not flat on top of it. With the Be-Wharned, holding the knife at this natural angle and driving the thumb straight along the chamfer of the handle produces the most positive, reliable, and comfortable opening.

With that experience as a guide, I focused on the functional part of the Spyderco hole. When the closed knife is viewed with the edge down, tip to the left, this section is from 12 to 3 o’clock. That’s where the thumb actually bites and drives. That part of the hole is completely unobstructed.

As for the lock release cutout, I purposely made it smaller than that of the Para2. There are two reasons for this: First, some users–especially those who grip the handle tightly with their index fingers during opening–get a slight pinch from Compression Locks as the blade is opened. This is caused by the liner moving into the G-10 scale as the blade clears the detent ball. To mitigate this effect, I asked that the top of the Compression Lock tab be recessed slightly below the top edge of the G-10 scale and purposely made the recess smaller.

Second, speed closing of the knife is not high on my priority list. I close the knife by pinching the lock between my thumb (on the G-10 scale) and the nail of my index finger (on the lock tab). I can do this (and have done it) all day long without soreness or fatigue. For me, it’s perfect the way it is. Most importantly, the knife closes exactly when I want it to and I still enjoy both the extreme strength and the I-don’t-need-to-put-my-fingers-in-the-path-of-the-edge safety of one-handed closing.

I chose the standard hourglass clip for the Yo2 because it has been refined and perfected over the years. It works great, so why reinvent the wheel? Also, savvy Spyderco fans know that the same basic clip design used on the Yo2 is used on the Endura and Delica, but in black (and with the addition of the lanyard hole that matches the holes in those knives). Don’t like the shiny clip on the Yo2? Buy a replacement clip for an Endura for a few bucks and you’ve got an instant subdued clip. How easy is that?

As far as clip position goes, most folks know I prefer tip-up carry. The key to getting a personal defense knife into action quickly is being able to draw it and immediately open it without having to change grip position. The key to that is making sure that the overall size of the closed knife, the position of the Spyderco hole, and the height of carry are all proportionate to the average hand size. If you have a big knife with a deep-pocket clip, it may carry discreetly, but when you draw it, you’re holding it by the butt end with your thumb a long way from the hole. Unless you can magically Viagra your thumb into growing, you have to change your grip to get the knife open.

The clip placement on the Yo2 makes the knife ride high enough so that, with a proper draw, your thumb is automatically on the opening hole when the knife clears the pocket.

If you prefer discretion and a low profile over deployment speed, I purposely added tip-down carry to the Yo2. The clip holes at the pivot-pin end of the handle are as close to the front edge of the handle as physically possible to support deep-pocket carry. Yes, it’s tip down, which is slower. So is deep pocket carry in general. If you need deep-pocket carry and speed, arry tip down and use a Spyder-Drop opening. You’ll find that although a small portion of the Spyder Hole is obscured, there’s still plenty of surface area to grab onto. As you pinch the hole with your thumb and index finger, you’ll also find that your fingertips start to push the handle away from the blade, “cheating” your start on the opening.

As for a lanyard hole, I’m not a fan of fobs, so I opted for the additional strength of a screw post at the butt instead of a lanyard tube. However, if you are a lanyard fan, there is still enough room between the blade edge and the screw post to wrap a thin lanyard around the post with a cow hitch. That keeps the lanyard centered in the handle instead of wrapping around it and makes for a sleeker package. Think of a typical flashlight lanyard where the loop that attaches to the light is thin and strong and the rest of it is 550 cord sized. If you must use 550 cord for the whole lanyard, pull the guts out of it so it wraps flat around the screw post.

I hope this helps you better understand why the Yo2 is the way it is. A lot of thought went into it and it is truly a reflection of more than 35 years of experience, training, and daily carry of personal defense knives.

Stay safe,

Mike

P.S. As far as meat cutting tests go, yes, that was a big part of my personal R&D of the prototypes. Simple answer: It has more blade length than the original Yojimbo. It therefore cuts even deeper.”

 

 

Another one from Michael Janich in August 2012:

“Thanks for the discussion and your continued enthusiasm for the Yo2.

When I designed the blade for the Yo2, I took a lot of inspiration from the Manix2, both because I like the way it cuts and because, as a Golden-made product, its manufacture respresented a known core competency for Spyderco. Combining a partial hollow grind with a thick, strong spine provides a great balance of edge geometry and strength. Moving the point up towards the blade’s centerline moves it toward the thicker part of the blade; however, if the hollow grind runs parallel to the edge all the way to the point, the resulting point thickness is functionally the same as what you get with a wharncliffe.

The wharncliffe blade excels at cutting because it cuts with full power all the way to the tip. An acutely angled tip also provides superior penetration with minimal effort.

From a utility standpoint, the Yo2’s tip is analogous to an X-Acto knife and is excellent for detail work. The heel of the blade, closer to the handle, is extremely strong and more than capable of tackling most cutting chores for which knives are appropriate tools. In general, if you focus on using the part of the blade that is most appropriate to the task at hand, you can perform a wide range of cutting chores without a problem.

Having designed several wharncliffe blades now, I have also been privy to the warranty repair claims concerning these blades. In all honesty, broken tips are rare. The ones that do come in typically come with a story that begins “I dropped my knife on concrete/a hard tile floor….” or “I know I shouldn’t pry with a knife, but…”

Like a box cutter, a wharncliffe cuts with both power and finesse because of its straight edge. If your style of utility knife use actually focuses on cutting, it will serve you well. If your utility knife use focuses on prying, digging, or using your knife as a jack handle, buy a knife that is better suited to that type of use–and don’t expect it to cut very well…

I hope this helps.

Stay safe,

Mike
Michael Janich
Spyderco Special Projects Coordinator
Founder and Lead Instructor, Martial Blade Concepts”

 

Yojimbo 2 C85CFP2 – S90V & Carbon Fiber

“Number 17” has entered in my life yesterday as I was angry about an order blocked in the airport for 12 days. I had ordered a Yojimbo 2 (G10, S30V) and since the 5th of May it has disappeared from the tracking.
So yesterday I indulged myself with a very rare exclusive run for Knifeworks three years ago: a Yo2 with S90V and Carbon Fibers handle.
Better, I had ordered a deep carry clip and it’s now mounted.

My idea is to use the Yojimbo, not as a SD tool but as EDC tool. So this safe queen is going to see some mileage and S90V will be welcome for it’s very high abrasion resistance. This is my point, I hope the Yo2 will keep its own (point) sharp and solid.

Some intense sharpening was mandatory. The edge was uneven from one side to the other (3mm against 2mm)… Now it’s much better after some intense passes on the Fallkniven little diamond/black stone tool and the Spyderco ceramic grey/white.

And well, it works just fine.

Quoting Michael Janich about his own design on the Spyderco Forum:

“…With regard to the utilitarian function of the Yo2–absolutely. I grew up in pretty humble surroundings. Although we didn’t have much, my Dad was very smart and skilled with his hands. I learned that the best way to have stuff was to make it, so I used to spend hours making toys out of cardboard, scrap wood, string, and anything else I could scrounge. One of my most prized possessions back then was an X-Acto knife set my Dad bought me with all the different blade shapes. Initially, I thought the different blades were cool and spent time swapping blades to cut different materials and shapes. After a while, though, I realized that the standard straight cutting edge was the most versatile. If I needed precision, the tip did the job. At the same time, if I needed cutting power, the straight cutting edge transferred power all the way to the point.

The blade for the original Yojimbo was based very much on these experiences and the shape of a common utility knife/box cutter. It was designed before 9/11, but released after. Promoting it as a “box cutter on steroids” was not appropriate at that time, but functionally, that’s exactly what it was. The Yo2 does the same thing, but even better…”

And more from another thread:

” … Helping my Dad with DIY projects around the house, I noticed that most utility knives, electrician’s knives, and similar “trade-oriented” cutting tools were Wharncliffe or sheepfoot blades. Again, in practice, it made sense and they worked. I chose my first pocketknives–Case slipjoints with straight edges–based on that experience.

When I started studying combative knife skills as a teenager, I read all the classic WW2 books on the topic, many of which recommended Bowie-style blades with significant “belly” to the edge so they could be used to snap cut. My taste in knives changed as a result of that and I began carrying blades with more belly and well-centered points. My first commercial knife design–the Masters of Defense Tempest–even reflected that style. However, when I had a chance to design what ultimately became the Ronin, I went “back to the drawing board” and did a lot of live-blade cutting with everything in my collection. I found that the knife that cut best was actually my Spyderco C25 Centofante, which was a Wharncliffe. When I began to analyze and really understand the dynamics of cutting, I realized why.

Cutting is cutting, whether it’s utilitarian or defensive. For cutting power and dexterity in a small blade, the Wharncliffe really shines…”

There is nice video made by Michael Janich explaining his design here on Youtube.

And by the way, the collector is just using a Yojimbo2 (S30V/G10) as an EDC.
It got the scars to tell its story.

To be continued… here :
Yojimbos-c85gp2-and-c85…