O1 edge retain test

J

JeffreyFogleboch

Joined
May 13, 2009
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193
Test Kwaiken made by me

O1 tool steel (RC-59-60) with cryogenic treatment.

Thickness behind edge- .007"

Edge bevel: 40 degree inclusive

Initial sharpness:hair whittling, easily push cutting newsprint



20 cuts(120") push cuts newsprint easily

40 cuts(240") push cuts newsprint

60cuts (360") still push cutting newspaper (a little rough)

80 cuts (480") roughly cutting newsprint

100 cuts (600") will slice newsprint grabbing arm hairs

120 cuts (720") easily slicing newsprint. Barely shaving arm hair

140 cuts (840") easily slicing newsprint. Not shaving and barely grabbing any hair

160 cuts (960") slicing newsprint fairly easily

180cuts (1080")slices newsprint with one extremely small but detectable roll in the edge.

OUT OF CARDBOARD!!!



Stropped on leather+green chromium oxide. Easily push cuts paper with one spot still being slightly rolled. Hair popping sharpness was restored.



Conclusion: O1 held up wayyyyyy better than I expected. The very thin flat grind makes this thing one hell of a slicer. This test was done with 1/8" cardboard cutting with the "grain" for the first 160 cuts. The last 20 were cross cuts. Please feel free to comment and tell me what you think. I hope you enjoyed
 
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Sorry I copy and pasted this from my notes and I have no idea why all of these emojis are in place of letters...all fixed 😎
 
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Interesting writeup.
Pics of the Kwaiken? Did you do the Heat and Cryo yourself?
What blade stock thickness did you use?
I've got a small "Tuff Pik" in O1 from Mr. Thumbs. For a simple low-tech steel, O1 takes a heck of an edge.
 
I'll get pics up when I'm around my computer. The heat treat was done by peters heat treat and the thickness is 1/8". The length of each cut was 6"
 
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