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Sharpening Stone Identification

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Forum topic by steveinaz posted 08-20-2017 05:43 PM 393 views 0 times favorited 4 replies Add to Favorites Watch
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steveinaz

39 posts in 985 days


08-20-2017 05:43 PM

I just picked up these two stones at a tag sale. I figured I could bring them home, flatten them and add to my arsenal. One is more course than the other. They are very hard. I used a diamond stone and made very little progress over the course of an hour. I don’t know if it is worth it to put more effort into them as I am not sure of their value. I have a couple water stones and diamond stones. The backs might be easier to flatten, but I’m not sure if that side is usable. All comments appreciated.

-- Steve in AZ


4 replies so far

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Aj2

1151 posts in 1609 days


#1 posted 08-20-2017 08:52 PM

I don’t know what they are but I do know that some of those types of oil stones will turn a 220 Dmt into a worthless piece of plastic.
If you really need them flat find a flat cinder block to get you most of the way.
Gook luck and nice find.

-- Aj

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steveinaz

39 posts in 985 days


#2 posted 08-24-2017 07:28 PM

AJ2
I spent a dollar on a cinder block and tried to flatten the stones. This seems very much like a losing battle. I wonder how many years it took the previous owner to dish the stone. Thanks for your reply.

Steve

-- Steve in AZ

View gargey's profile

gargey

851 posts in 587 days


#3 posted 08-24-2017 07:40 PM

I’d think a DMT Dia-Flat would work. But those are $150+

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Loren

9549 posts in 3459 days


#4 posted 08-24-2017 07:41 PM

Those stones are probably silicon carbide. That’s
the same stuff gray grinding wheels are made of.
It’s very tough and hard-wearing. They can
allegedly be flattened with silicon carbide powder
lubricated on a piece of plate glass. I doubt
however it is worth the investment. The stones
are typically not very expensive.

You can get coarse Japan water stones made
of silicon carbide in a soft clay binder. I’ve
never used one but I presume they cut pretty
fast.

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