Best Steel (and Angle) for Cardboard Cutting

Well, make them, get after it. Nothing is free.

It's $250 per hour for SEM imaging including sample preparation.

Time and money is all it needs, make it so.
:D


chiral.grolim said:
Yes, I thought that was what you meant by "more surface area to wear down" - the area of the edge length x width. I don't think most people think about the width of the apex really, even though that is what gives a blade its sharp edge.

I'd like to see some "after" SEMs comparing a coarse edge to a plain edge prepared like you typed and then put through a wear test until the first blade gets too dull to go on - what is the wear profile of each, how thick is the apex of the plain edge and the condition of the "teeth" of the coarse edge? Those images must exist somewhere...
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chiral.grolim said:
:thumbsup::thumbsup:

Far more important than the precise mechanism is the experience, imho. If a technique works well for you, knowing the "why" is only important so far as needing to explain it and improve it, but knowing that it works is sufficient for the task at hand ;) But we still want to know why.
Click to expand...

Couldn't have said that much better myself :)
 
I picked up a bunch of cardboard boxes couple of days ago for this test I was going to carry out. Went for a ride earlier, when I came back I noticed it was Christmas day :), so I started the test. I edited the movie, 47min long, I am just uploading it on YouTube.
I hope you all enjoy the test.
Farid Mehr
 
movie of the testing uploaded ok last night, here is the link. This will show how good M35 HSS is, I could have cut hundred times more cardboard without sharpening it, it is a 'steel designed to cut other steels'


 
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Stanely (et-al) Box Cutter/Utility knife with ceramic blades would be my first choice.
Same knife with Tungsten Carbide blades would be my second choice.

Cardboard can be as hard on a blade as drywall.
 
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