Welcome, Guest
Username: Password: Remember me

TOPIC: 50 grit not working?

50 grit not working? 7 months 2 weeks ago #15294

  • still dull
  • still dull's Avatar
  • OFFLINE
  • Fresh Boarder
  • Posts: 4
  • Karma: 0
Seems odd but while working on my third knife using the 50 grit it just stopped working. Slick as snot. The 80 throws all kinds of healthy metal dust into the air.I have used all my other stones a lot more and they are all working great.I cleaned it with a toothbrush and a little soapy water to no avail. Any suggestions?

Thanks
The administrator has disabled public write access.

50 grit not working? 7 months 2 weeks ago #15296

  • blacksheep25
  • blacksheep25's Avatar
  • OFFLINE
  • Senior Boarder
  • Posts: 53
  • Thank you received: 33
  • Karma: 5
do you have pics of the 50 next to your 80 stones? what blade steel did you or are trying to sharpen?
The administrator has disabled public write access.

50 grit not working? 7 months 2 weeks ago #15297

  • still dull
  • still dull's Avatar
  • OFFLINE
  • Fresh Boarder
  • Posts: 4
  • Karma: 0
Hey Blacksheep,
Can't really get anything to show up in pictures.It just seems like it glazed over for lack of a better term.The knife is an older cheapie I think.
Thanks
Attachments:
The administrator has disabled public write access.

50 grit not working? 7 months 2 weeks ago #15300

  • tcmeyer
  • tcmeyer's Avatar
  • OFFLINE
  • Gold Boarder
  • Posts: 239
  • Thank you received: 192
  • Karma: 21
A few years ago, I wrecked one of my diamond plates that I used for freehand sharpening. It's a 3" X 8" plate with 400 grit on one side and 1200 on the other. The grit looked really uneven when it was new and it seemed that as I sharpened on it, the bits of grit that stood proud of the substrate would break off. I assumed that this was just part of breaking in the stones, but eventually the stones became less effective. I concluded that I was applying too much pressure.

The diamond grit is usually attached to the substrate with some sort of plating process - often nickel plating. It's important to remember that the grit is not part of the substrate, but attached to it. Too much pressure (or a poor plating job) can knock the grit loose. Unlike a homogeneous stone, once the grit is gone, it's gone.

When I first saw Clay stoning a blade in the promo video, a light bulb flashed in my mind. I realized that driving an edge into a diamond plate could knock grit off the substrate more easily than an edge drawn backward across the same plate at the same pressure. I now avoid drawing my diamond blocks down into an edge, except at very light pressure.

That said, I suspect the diamond bits in your case weren't solidly attached and broke free. Perhaps a case of contamination somewhere in the plating process?
The administrator has disabled public write access.

50 grit not working? 7 months 2 weeks ago #15301

  • still dull
  • still dull's Avatar
  • OFFLINE
  • Fresh Boarder
  • Posts: 4
  • Karma: 0
Thanks TC,
I wondered about drawing the stones into the edge but saw videos and read a lot about people using scrubbing motions that I started using a scrubbing motion so that may be it.It makes sense to me that drawing into the blade could take off grit more easily.I really liked the 50 on the few I did and I didn't find it too bad to get the sratches out so I will miss having the 50 grit.I was thinking of dipping in to my kids inheritance and trying the atoma 140.

Thanks again TC
The administrator has disabled public write access.

50 grit not working? 7 months 2 weeks ago #15302

  • LeoBarr
  • LeoBarr's Avatar
  • OFFLINE
  • Platinum Boarder
  • Posts: 687
  • Thank you received: 237
  • Karma: 33
Makes perfect sense what you are saying plus from using bench stones I always use the pressure on the blade when it is going up the stone away from me with the edge facing me and little pressure on the return stroke so avoiding much pressure on scrubbing strokes makes sense.
The stones seem to work best when speed outdoes pressure - think belt sanders for instance.
The administrator has disabled public write access.
Time to create page: 0.126 seconds