PM2 Edge Dressed

M

MadRookie

Joined
Sep 15, 2010
Messages
234
Just finished up.....Spyderco Paramilitary 2 Sprint, Carbon Fibre - S90V blade.

16 degree mirror relief with 18 degree micro bevel at 1k Shapton GS.

Now it is worthy for some pocket time....

Some pics:








:)
 
Wow, that is a beautiful edge! I have a PM2 coming soon, if I can get close to that I'll be very happy!
 
Why polish the edge if you are going to microbevel with a 1k stone?
 
Why not? Because you are using a larger abrasive than primary bevel was sharpened with. The larger abrasive being used on the microbevel does not allow it to be a microbevel because you at not decreasing the size of the primary edge apex. You would be better off just using a coarse stone.

A bevel that small does not produce enough drag, the thickness behind the bevel, the shoulder of the bevel, and the type of grind the blade itself has are the drag in cutting, not the bevel.

If you really want to reduce drag then polished is not the way to go. It promotes stiction when cutting.
 
knifenut1013 said:
Why polish the edge if you are going to microbevel with a 1k stone?
Click to expand...

The micro bevel is so small that you can hardly see it with the naked eye.

The reason for the micro bevel is to just bring the edge back to a good cutting grit as the relief mirror at 30k is too sharp for practical application.

Also when touching up the edge for maintenance, the mirror relief is not affected.

:)
 
Quick cell phone video...


[video=youtube;5U-VblYYFyg]https://www.youtube.com/watch?v=5U-VblYYFyg[/video]


:)
 
knifenut1013 said:
Why not? Because you are using a larger abrasive than primary bevel was sharpened with. The larger abrasive being used on the microbevel does not allow it to be a microbevel because you at not decreasing the size of the primary edge apex. You would be better off just using a coarse stone.

A bevel that small does not produce enough drag, the thickness behind the bevel, the shoulder of the bevel, and the type of grind the blade itself has are the drag in cutting, not the bevel.

If you really want to reduce drag then polished is not the way to go. It promotes stiction when cutting.
Click to expand...

As far as stiction, I'll concede that - vegetables were not a good example. The polished edge on my Emerson CK does just fine.

Can you clarify how the larger abrasive precludes the formation of a microbevel? As I understand the term, it simply describes a more obtuse edge-of-the-edge than the bevel, reason notwithstanding. Thanks.
 
@ knifenut1013

With all due respect, your statement that using a larger abrasive does not allow it to be a micro bevel, is incorrect!

Relief bevel, primary bevel, secondary bevel, cutting bevel, micro bevel....call it what you want, NO bevel is bound/dependent on the abrasive particle size - the abrasive particle size will only determine the final level of polish on a surface, be it big or small.

In my case the shiny mirror bevel is purely for aesthetics, while the actual cutting edge is sharpened to 1k, a good mid choice between a good slicer/push cutter, which works for me as an EDC.

The term "micro bevel" references being "smaller" in relation to another larger bevel - there is also no pre-determined "size", quantifying these measurements.

So in layman terms, YES, one can make a big bevel shiny with fine grits and then make a little bevel with a courser grit, or vice verse.

Also decreasing the size of the primary edge apex is NOT grit size dependent - you can sharpen the EOTE (edge of the edge) to ANY grit you fancy - the level of refinement here only determines the cutting/slicing performance of the actual edge.


:)
 
Welcome Mad Rookie! This guy is the edgepro king. Helped me out out another respected knife forum.
He will bring a lot to the table, try not to piss him off as he knows his shit. Russ
 
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