Resurfacing Norton JB8?

M

Metal Man 007

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Oct 18, 2020
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I have a newish JB8 I seem to have screwed up. I bought a slightly used stone on ebay that was working nicely. I noticed a small indention where it seems the previous owner sharpened a small chisel so I decided to clean up the stone with some 80 grit silicon carbide sand paper and a block.
Well I didnt get the little dip out of the stone and wore the sand paper out pretty much instantly. I did manage to take away the cutting surface on the stone perfectly. Now my blade glides over the stone like glass and there is no cutting action. Is it trash? The is the coarse side of the JB8. Currently after my little tune up, the fine side cuts more and faster that the coarse side.
 
Quick and easy fix: Go outside and resurface the coarse side of your stone on the concrete.

Go find the flattest piece of sidewalk, driveway, or staircase you can find. Wet it down a bit, then start rubbing the stone in a figure 8 pattern.

Don’t get *too* crazy with the pressure, and check your work often as it shouldn’t take too long to fix. The trench from the chisel will get taken out as well.

If you decide to stick with freehand sharpening, a good idea would be to invest in an 8 x 3 Atoma 140 grit diamond plate for a more controlled flattening process in the future!
 
Sand paper works poorly. Get some loose 80 grit SIC and a little water and a flat piece of glass or a paving stone. Let the grit do the work - don't bear down hard on it. 5 minutes will flatten anything.
 
thanks for the help . I did hear about the SIC grains and though well heck sand paper would just as good. Looks like I was mistaken
 
Glock Guy said:
If you decide to stick with freehand sharpening, a good idea would be to invest in an 8 x 3 Atoma 140 grit diamond plate for a more controlled flattening process in the future!
Click to expand...

My understanding is that the Norton Crystolon coarse, which the OP refers to, is 120 grit. I always thought that flattening had to be done with a lower grit, but the Atoma 140 is higher. Will the Atoma still work?
 
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David Martin, thanks!

I didn't think that could be so, but it's good to know and I will remember it, especially as I have both the coarse Crystolon and Atoma 140.
 
The number differences of diamond are reflected in how diamond is mfg..
I have noticed my 220 mesh diamond 'feels' mores coarse than a 180 grit SiC stone. DM
 
David Martin, thank you again.

I will start paying more attention to this difference, as all my sharpening (freehand; coarse edges) is done with SiC and diamond.
 
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