Sharpening Angle on Busse Knives?

I sharpen INFI at 18dps no micro bevel which works fine on hard wood like camelthorn(hard as bone). Normal hard wood I will go to 15dps. I do not use sr101 anymore but if you do it needs to be at 20dps with 25dps micro bevel on hard wood.
 
Anton41Beukes said:
I sharpen INFI at 18dps no micro bevel which works fine on hard wood like camelthorn(hard as bone). Normal hard wood I will go to 15dps. I do not use sr101 anymore but if you do it needs to be at 20dps with 25dps micro bevel on hard wood
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sr101 really that brittle? 12c27 can cut hardwood at 7-8dps
 
Laurarium said:
sr101 really that brittle? 12c27 can cut hardwood at 7-8dps
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12c27n /.6% carbon, very tough.

Cut hardwood? Cutting hardwood, splitting wood, chopping wood. Blade length, geometry, weight forward, edge thickness. Variables.... all my sr101 blades was heavy and large/long. Mid carbon suits large choppers
 
Laurarium said:
Excuse me, made a mistake. It should be 12c27 can cut hardwood around 10-12dps with no significant damage, just slow wear. why can’t that work? 12c27 is a fantastic steel, it has great edge stability.
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Even at 10-12 dps, I'd love to see this. Let me know where you saw or read this. Thanks
 
I would say that you are fine at 15 dps for any busse steel.

I took this knife accidentally down to 8.8 dps. Not intentionally. I miscalculated my triangle. I chopped about 8 cottonwood 4-6 inch branches that I had to reduce in size and it held up fine on that wood.

yMXMCYW.jpg




Then I decided that I would hack into bunch of thick copper tubing and did so to see if I could induce fracture. All it did was create a rough burr on the edge, probably due to the thin edge. I was able to steel it off
02bLoaS.jpg



Cliff also took his old SHBM down to 8dps and processed tons of wood with it, with little damage. He did have some rippling because the steel was so thin. but no fracturing. The original knives were running 2pts harder though. That does make a difference in resistance to deformation.
 
Cobalt said:
I would say that you are fine at 15 dps for any busse steel.

I took this knife accidentally down to 8.8 dps. Not intentionally. I miscalculated my triangle. I chopped about 8 cottonwood 4-6 inch branches that I had to reduce in size and it held up fine on that wood.

yMXMCYW.jpg




Then I decided that I would hack into bunch of thick copper tubing and did so to see if I could induce fracture. All it did was create a rough burr on the edge, probably due to the thin edge. I was able to steel it off
02bLoaS.jpg



Cliff also took his old SHBM down to 8dps and processed tons of wood with it, with little damage. He did have some rippling because the steel was so thin. but no fracturing. The original knives were running 2pts harder though. That does make a difference in resistance to deformation.
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Sounds about perfect
 
sure. You know, Mora knives are sharpened at around,10-12 dps, just take a companion in 12c27 and cut hardwood to see if there is any significant damage beyond slow wear. First saw this from Cliff Stamp YouTube video, then I tested with Mora with 10-12 dps factory edge, they can handle it no problem! and note that falling axes are only 7-8dps, I don't think sr101 will have any issue at 15dps
 
Cobalt said:
Even at 10-12 dps, I'd love to see this. Let me know where you saw or read this. Thanks
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sure. You know, Mora knives are sharpened at around,10-12 dps, just take a companion in 12c27 and cut hardwood to see if there is any significant damage beyond slow wear. First saw this from Cliff Stamp YouTube video, then I tested with Mora with 10-12 dps factory edge, they can handle it no problem! and note that falling axes are only 7-8dps, I don't think sr101 will have any issue at 15dps
 
Laurarium said:
sure. You know, Mora knives are sharpened at around,10-12 dps, just take a companion in 12c27 and cut hardwood to see if there is any significant damage beyond slow wear. First saw this from Cliff Stamp YouTube video, then I tested with Mora with 10-12 dps factory edge, they can handle it no problem! and note that falling axes are only 7-8dps, I don't think sr101 will have any issue at 15dps
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just checked Mora knives are 11.5dps
 
Laurarium said:
sure. You know, Mora knives are sharpened at around,10-12 dps, just take a companion in 12c27 and cut hardwood to see if there is any significant damage beyond slow wear. First saw this from Cliff Stamp YouTube video, then I tested with Mora with 10-12 dps factory edge, they can handle it no problem! and note that falling axes are only 7-8dps, I don't think sr101 will have any issue at 15dps
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Depends on the wood. 15 dps won't work on African hard woods(camelthorn/like bone). I followed Cliff Stamp for a long time. I use to test lower angles on hard woods like camelthorn.

At 15dps sr101 becomes a serrated blade, I tested many samples. 18dps with a steep microbevel did ok. 20 with a 25 micro if you want minimum to no damage.

I like mid carbon steels and agreed with Cliff it made more sense in large knives which took a beating because of toughness and ease of sharpening.

If you really use a knife week after week you realize that you will damage the Apex from time to time NO MATTER THE STEEL, so ease of sharpening is really worthit. I like toughness and corrosion resistance.
 
Anton41Beukes said:
Depends on the wood. 15 dps won't work on African hard woods(camelthorn/like bone). I followed Cliff Stamp for a long time. I use to test lower angles on hard woods like camelthorn.

At 15dps sr101 becomes a serrated blade, I tested many samples. 18dps with a steep microbevel did ok. 20 with a 25 micro if you want minimum to no damage.

I like mid carbon steels and agreed with Cliff it made more sense in large knives which took a beating because of toughness and ease of sharpening.

If you really use a knife week after week you realize that you will damage the Apex from time to time NO MATTER THE STEEL, so ease of sharpening is really worthit. I like toughness and corrosion resistance.
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that's for sure a damn tough wood if it can chip sr101, which can chop wire like wood. How about infi vs African wood?
 
Laurarium said:
sure. You know, Mora knives are sharpened at around,10-12 dps, just take a companion in 12c27 and cut hardwood to see if there is any significant damage beyond slow wear. First saw this from Cliff Stamp YouTube video, then I tested with Mora with 10-12 dps factory edge, they can handle it no problem! and note that falling axes are only 7-8dps, I don't think sr101 will have any issue at 15dps
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I am glad you picked Mora, because they do have excellent steel.


So, I have a ton of Moras because they are efficient tough and cheap. I also have the companion. The edge on the companion is 13.5dps. Still very thin. But there is a serious issue you are not taking into account. No matter how hard you try, you cannot develop the impact force with a mora than you can with a large heavy knife There is no comparison in terms of force exerted on the edge in a mora vs a heavy chopper or even a medium sized large blade. Batoning does put stress on the edge, but again, you are going through small wood with a small knife. Large wood batoning is much tougher with large knots etc.

As for axes, no felling axe has an angle of 7-8dps. On gransfors bruks own website, their sharpest angle is for carving and that is 25dps. For chopping they go more obtuse than that
Slipning-Yxans-skotsel-6.jpg

1: For cutting hardwood or frozen wood
2: For cutting softwood
3: For carving. Angle 25º – 30º
4: Wrong grind

Tis tells you how hard chopping is on an edge. No comparison, you need a lot more edge toughness on a big blade, than you do on a small blade. INFI is literally overkill on a small blade.

so when I used the knife about at 8.8 dps, the blade grind being flat is much thinner than any mora. Less metal behind the edges shoulder than a mora. The stock was so thin it did ripple slightly. But never tore or chipped.

 
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