RMD cut test video

K

kimberfan

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Feb 8, 2011
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386
http://www.youtube.com/watch?v=KgxD7tIieNY

video of a cut test on my RMD after coming off my extra fine arkansas stone

could be better if i stropped it, and the paper didnt want to go along with it, its very thin notepad paper (the yellow kind with green lines)

tell me whats ya think? and sorry its so long it just took a while to get good cuts on the paper :p
 
It looks like you need to knock off the bur your blade. It will shave with it on there but you can hear it and see it in your paper cuts. I usually do this by making some passes at a higher angle than the I have shapened the blade at. I use a Wicked Edge. Lets say I shapened the blade at a 22 degree angle. I will than put the angle out 24-25 degrees and go at it a bit with 1500 grit wet/dry sand paper over the stones. Before I had the Wicked edge I would sharpen on DMT stones then knock off the bur on a ceramic rod. You can feel the bur if you place the edge of the blade on your fingernail and drag it backwards (spine moving away). You can also tell where the bur or a rolled edge is by cutting paper slow starting with the bottom of the edge and ending with the tip. You will notice smoother and rougher sections of the cut. You should also be able to feel them as you cut. When you have the edge even and de-burred you will feel, hear and see a smooth and even cut.

I have also had success wit stropping the edge on a 1500 grit wet/dry sand paper square taped over a mouse pad on a flat surface. Look around. I learned most of that suff from posts on BF. The rest from trial and error.

I am a pure amature and I can get my SR101 hair whittling sharp. that stuff is amazing!

Nice knife! Thanks for the video.
 
jdigi101 said:
It looks like you need to knock off the bur your blade. It will shave with it on there but you can hear it and see it in your paper cuts. I usually do this by making some passes at a higher angle than the I have shapened the blade at. I use a Wicked Edge. Lets say I shapened the blade at a 22 degree angle. I will than put the angle out 24-25 degrees and go at it a bit with 1500 grit wet/dry sand paper over the stones. Before I had the Wicked edge I would sharpen on DMT stones then knock off the bur on a ceramic rod. You can feel the bur if you place the edge of the blade on your fingernail and drag it backwards (spine moving away). You can also tell where the bur or a rolled edge is by cutting paper slow starting with the bottom of the edge and ending with the tip. You will notice smoother and rougher sections of the cut. You should also be able to feel them as you cut. When you have the edge even and de-burred you will feel, hear and see a smooth and even cut.

I have also had success wit stropping the edge on a 1500 grit wet/dry sand paper square taped over a mouse pad on a flat surface. Look around. I learned most of that suff from posts on BF. The rest from trial and error.

I am a pure amature and I can get my SR101 hair whittling sharp. that stuff is amazing!

Nice knife! Thanks for the video.
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i do all by free hand, i cant feel any bur at all, i'll get some good printer paper and make another video today
 
Give it a good strop on a leather belt if you are still having trouble with the burr. SR 101 is really tough to sharpen by hand.
 
btw for some reason i cant get a clean mirror finish with my RMD on this stone but i can on all my pocket knives, i wonder why?
 
kimberfan said:
btw for some reason i cant get a clean mirror finish with my RMD on this stone but i can on all my pocket knives, i wonder why?
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Natural stones like your Arkansas stone should not polish a edge, that's actually a bad sign. Though it will make the surface smoother and brighter it should always leave a dull finish. When a stone polishes it means the steel is too hard for the abrasive (note this totally goes out the window with synthetic abrasives) and instead of cutting the metal it rubs against it making a brighter more polished appearance.

Also, a mirror polish from the stone you have is not really expected, its likely still several thousand grit shy of where that point truly begins.
 
knifenut1013 said:
Natural stones like your Arkansas stone should not polish a edge, that's actually a bad sign. Though it will make the surface smoother and brighter it should always leave a dull finish. When a stone polishes it means the steel is too hard for the abrasive (note this totally goes out the window with synthetic abrasives) and instead of cutting the metal it rubs against it making a brighter more polished appearance.

Also, a mirror polish from the stone you have is not really expected, its likely still several thousand grit shy of where that point truly begins.
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well its not a true mirror finish but i can read in it if that makes sence? it looks like no scratches or anything and is fairly polished, its this way on my kershaw blur in 13c27 and gerber in ats-34, the stone is a extra fine translucent btw
 
It's complex but the stone you have is at the very limits of its usefulness on the steels you are sharpening. (the steel is almost as "hard" as the stone)

It's the reason for the different appearance and likely differing levels of sharpness your seeing.
 
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