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Sharpening with Paper Wheels 14190

Zombie Apprentice Posts: 12,654
Re: Sharpening with Paper Wheels
« Reply #50 on: December 11, 2017, 09:27:47 PM »

Thank you K,   :salute:
Always interesting stuff and stunning pictures   :tu:

Everything’s adjustable
Hero Member Posts: 826
Re: Sharpening with Paper Wheels
« Reply #51 on: January 12, 2018, 04:30:51 PM »
Another PM2 in S110V.
The new edge was done on a Paper Wheel with 15 micron diamond compound, and then refined with 6.0 micron, 3.0 micron, and 1.0 micron diamond compound, all on dedicated Paper Wheels.
The apex is keen enough to whittle several curls in a row on one of my chest hairs while holding the hair at the root end only.
You can click each pic 2 X for a bit more detail.












Waiting since 2011 for DaveK to send back my personal Leatherman maintenance tools....
Hero Member Posts: 826
Re: Sharpening with Paper Wheels
« Reply #52 on: March 12, 2018, 02:45:10 PM »
The owner of this Maxamet PM2 had given his knife a forced patina treatment, and besides coming out a bit uneven the acid had also completely eaten away the factory apex as well as the very tip of the blade.
To say that the knife was completely blunt would have been an understatement.
The request was to give the knife a new toothy edge with a lot of bite while making it as sharp as possible.
(You can click each pic 2 X for a bit more detail)

Before sharpening:











After sharpening
Flattened the acid damaged "apex" some more on a 3000 grit diamond plate so i could start with fresh steel, then made a new edge on a Rubber Wheel coated with +/- 230 grit diamond powder & wax, then deburred on a Paper Wheel with 1.0 micron diamond paste & oil.
The new edge is ever so slightly convex, the new apex fits almost exactly in the 30 degree inclusive slot of my Tormek WM200 Angle Master, plus it can whittle one of my chest hairs at about 5.5 centimeters from the point of holding. (i don't own a BESS tester)
The somewhat "fuzzy" shoulders of the new edge show how deep the acid has eaten away into the sides of the blade in some area's.










Waiting since 2011 for DaveK to send back my personal Leatherman maintenance tools....
Zombie Apprentice Posts: 12,654
Re: Sharpening with Paper Wheels
« Reply #53 on: March 12, 2018, 03:56:14 PM »

Thank you K,   :salute:
Always interesting stuff and stunning pictures   :tu:

At risk of repeating myself here  :imws:

Everything’s adjustable
Hero Member Posts: 826
Re: Sharpening with Paper Wheels
« Reply #54 on: September 14, 2018, 12:58:33 PM »
Right hand Takamura R2 Gyuto 210 mm from a local Chef, who got it as a birthday present from his wife.
The knife has already been used for two months in the commercial kitchen and it was time for it's first resharpening, which i did yesterday on a Paper Wheel with 15 micron diamond compound and then deburred on a second Paper Wheel with 0.25 micron diamond compound.
The idea was to make an edge that would do both slicing & pushcutting well, and also to remove as little steel as possible from the fine and thin R2/SG2 blade @ 63-64 HRC.
The new edge measures +/- 20 degrees inclusive and can whittle a chest hair from root-to-tip at about 4 centimeters from the point of holding, and after a few test cuts into a old piece of beechwood cutting board.

I took these pics with an old Ipad and actually wanted to erase them again as being not good enough until i enlarged the last picture twice.
At first i thought i saw small dirt spots on the new bevel, but those tiny white specks were actually the sliced off peaks of the micro-dot structure on the inside of the flimsy plastic blade protector sleeve.














Waiting since 2011 for DaveK to send back my personal Leatherman maintenance tools....
Zombie Apprentice Posts: 12,654
Re: Sharpening with Paper Wheels
« Reply #55 on: September 14, 2018, 01:20:29 PM »

Thank you K,   :salute:
Always interesting stuff and stunning pictures   :tu:

At risk of repeating myself here  :imws:

 :imws:

 :salute: :cheers:

Everything’s adjustable
Hero Member Posts: 826
Re: Sharpening with Paper Wheels
« Reply #56 on: September 14, 2018, 05:23:36 PM »
The owner of the Takamura R2 just sent me the link to this clip, in which he uses a grape to test the new edge:

https://m.youtube.com/watch?v=ID9KZW0d9ss&feature=youtu.be

Waiting since 2011 for DaveK to send back my personal Leatherman maintenance tools....
Zombie Apprentice Posts: 12,654
Re: Sharpening with Paper Wheels
« Reply #57 on: September 14, 2018, 08:25:01 PM »

 :sa: :sa: :sa:

Everything’s adjustable
Absolutely No Life Club Posts: 7,249
Re: Sharpening with Paper Wheels
« Reply #58 on: September 14, 2018, 10:42:39 PM »
That last slice through the grape.... ridiculous!

 :salute:

- Terry

Burn the land and boil the sea, you can't take the sky from me...
Hero Member Posts: 826
Re: Sharpening with Paper Wheels
« Reply #59 on: February 03, 2019, 03:43:11 PM »
Update on the Takamura R2 210 Gyuto:

According to the Chef this edge done on Paper Wheels lasted him 2 months in his commercial kitchen, which was just as long as the factory edge had lasted him.
During that time he sometimes touched up the edge by stropping it on an MDF strop with 1.0 micron diamond compound until that no longer worked satisfactory (in the last week or so), after which he used a fine ceramic rod on it.
Differences with the factory edge were that the Paper Wheel edge had a slightly smaller edge angle (+/- 20 degrees inclusive instead of +/- 22,5 degrees inclusive), was finer polished, and had a higher sharpness.

We're still in the process of finetuning the edge to his specific requirements, and next time he brings in the knife it will probably get a little less refined edge to see if it's useful life can be prolonged a bit more.
In his kitchen the real edge killers are the mandatory plastic cutting boards which are very abrasive on knife edges, together with the almost unavoidable tiny sand particles which sometimes remain in the huge quantities of vegetables that need to be processed.

Waiting since 2011 for DaveK to send back my personal Leatherman maintenance tools....
Zombie Apprentice Posts: 12,654
Re: Sharpening with Paper Wheels
« Reply #60 on: February 03, 2019, 08:08:59 PM »

 :salute:   :popcorn:

Everything’s adjustable

 

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