Spyderco CF Stretch ZDP-189 and two edge geometry performance on pipe

[marthinus]

Reprofiled edge performance starts around 3:20

I received the knife with a good edge, but it did seem to bind in the pipes I sometimes cut.

Relief edge was applied at around 10degrees per side and I left a micro bevel of the previous edge. The knife's performance has increased significantly. At least, it feels that way.

Thanks for watching.

[video=youtube;UY1JTj6qK70]http://www.youtube.com/watch?v=UY1JTj6qK70[/video]

 

[basetta70]

Hello, thanks for sharing the video.
Which sharpening hardware have you used? also Stropped?
Have you noticed any micro chipping?
Thanks

 

[marthinus]

I sharpened on a 600Grit Lansky diamond paddle, then used a Spyderco UF benchstone to polish the relief edge. The micro bevel remains a 600grit finish and only stropped to remove the burr if there is one.

No chipping issue at all.

I have a DMT D6FC 6-Inch Dia-Sharp Double-Sided Fine/Coarse Bench Stone on the way to do any future reprofiling/relief edges. I am currently away from home so I had to make due with what I have with me.

 

[KennyB]

What kind of pipe was that? Don't have speakers on the computer...

It definitely seems like the cuts were made quicker, so unless you were using a lot more force or something definitely seems like it helped a lot.

 

[marthinus]

KennyB

It is a type of high pressure hose pipe used for water cooling.

Here is a side view:

After the relief edge was applied on the knife I experienced it required considerable less force to pierce and cut through the pipe. Hand fatigue was also a lot less while cutting compared to the first cuts. Dont worry about the sound. I dont say much and all you hear throughout the video is the machinery running in the background.