Angle on SHBMs for sharpening

Maestro Hays

Maestro Hays

Joined
Apr 10, 2006
Messages
184
What is the sharpening angle on a normal (not 1/300) SHBM? It has a symmetrical edge. Im guessing 23 degrees or so, but I wanted to ask the experts before I touch this knife to a stone. :)
 
No sharpening angle....they're all different. The edges are hand ground so there's no uniformity. Also, most of the hollow rivet SHBM's were asymmetrical edges. As were some of the slotted screw SHBM's. No asymmetrical 1/300's to my knowledge...unless someone sent one back for an edge job.
 
You're lucky you've got a symmetrical :D though the asymmetrical has grown on me.
 
Well as it turns out its asymmetrical. (How many satins were made anyway?)

I looked it up on Bad Mojo... if the blade is facing down, the RIGHT side is convex and the LEFT side is flat, but they still dont give the angles for sharpening. Im sure Busse would know.

Anybody from Busse wanna chime in?
 
Asym does not need stone, just crock stick the flat side toward the edge then buff or strop.

That is the magic of the asym edge.

Once you learn how, it is the easiest to maintain of all knives.
 
Croc stick? You mean a honing stick? Fine or extra fine?

Where might I find more info on sharpening techniques? Im just used to the old stone deal.

Thank you kindly!
 
Maestro Hays said:
Croc stick? You mean a honing stick? Fine or extra fine?

Where might I find more info on sharpening techniques? Im just used to the old stone deal.

Thank you kindly!
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From the BusseCombat.com website:

Sharpening
INFI's high level of chip resistance also makes it the easiest steel to resharpen by hand that we have ever encountered. I personally fall into the category of "hand sharpening challenged". I've heard tales of those who can sharpen ball peen hammers to a razor's edge on an Arkansas stone in less than 5 seconds flat. My experiences have always been to the contrary. The spine of the knife is usually sharper than the edge when I'm finished applying my magic stone sharpening technique. One of the great features of INFI is that simply stropping away from the edge (the way a barber strops a straight edged razor) on a ceramic stick is basically all that is required to resharpen INFI. Since you're not chipping steel off the edge there is no need to grind any steel away. This feature of INFI will, likewise, allow you to keep the same overall profile of the knife for a much greater period of time.
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From BadMojo:

The term Asymmetrical edge does not mean that the knives are chisel ground. All the knives are flat ground, with complete symmetry right to the edge bevel and this is where the Asymmetrical work is done. Hence the name Asymmetrical EDGE. With the blade edge down the left side is flat ground and the right side is convex ground. This edge is both stronger and easier to sharpen than many other grinds.


Method 1
How do you sharpen the Asymmetrical Edge? To maintain the asymmetrical edge, the flat and convex sides should be sharpened in different ways. To sharpen the flat side you need to use a ceramic rod and draw the knife towards you, edge away from you. To sharpen the convex side you can you a leather strop. Sharpening the knife in this way will realign the edge without removing as much metal.


Method 2
This is Cliff Stamp's current sharpening method as follows:

Touch up with strop, first on canvas then leather plus Lee Valley CrO compound if this fails to produce a high quality edge. Turn to a few passes on 800 grit ceramic rod. If this fails to leave an aggressive edge, remove a little more metal so try a few passes on a 600 grit 12" DMT diamond rod. Touch up with strop and if necessary, a few passes on 800 grit ceramic rod.

Afterwhile even this stops working as there will be a visible secondary bevel on the edge. Then back up one step further, Use a SiC wet/dry sandpaper on the convex bevel, Then use a SiC waterstone on the flat bevel. Then use a finer grit of the same & touch up with strop and if necessary a few passes on 800 grit ceramic rod.


Method 3
This last method is to use a buffer / slack belt sander, this method is much quicker if you have the skills.


Method 4
Contact & send the knife back to Busse Combat Knife Co. for sharpening.
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