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sharpening stone grit comparisons

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Forum topic by HokieMojo posted 12-11-2009 05:53 PM 4413 views 0 times favorited 4 replies Add to Favorites Watch
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HokieMojo

2103 posts in 3188 days


12-11-2009 05:53 PM

Topic tags/keywords: sharpening water stones diamond stones king stones

I’ve been trying to do some research on the web, but I am getting conflicting results about how the grits of various sharpening products relate to one another.

I currently have one sharpening stone and it is a “Smith’s abrasive 750 grit diamond stone”. It seems fine. It gets me to a better than factory edge, but I don’t think it sharpens enough. I use one of those simple rolling jigs that cost about $10.
smith stone
honing guide

Sometimes I go from that to the scary sharp method, but I have some personal reasons for why it doesn’t work well for me (don’t have thick enough plate glass, sandpaper is always getting damaged before use, no spray adhesive, etc).

I’d like to try some of these king stones that are on sale at woodcraft (see the bottom of the page for the combination stones):
http://www.woodcraft.com/Tab/003.aspx

After all this rambling, here are my two questions.
How would these grits correlate to my 750 grit diamond stone?
Could I use my diamond stone to flatten these waterstones?

Any help would be appreciated.
Thanks!


4 replies so far

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KayBee

1083 posts in 2707 days


#1 posted 12-11-2009 06:16 PM

It looks like your diamond stone is rougher than all of the water stones. Check out the scratch pattern on the back of your chisels to be sure. Finer scratches=finer grit Diamond stones are perfect for keeping waterstones trued. I have the same honing guide and it works great except for my smallest chisel.

-- Karen - a little bit of stupid goes a long way

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HokieMojo

2103 posts in 3188 days


#2 posted 12-11-2009 07:14 PM

How are you determining that the diamond stone is rougher than these? is the 750 grit for the diamond stone on the same scale that the waterstones are using? I thought that waterstones use a japanese scale and the diamond stones use a U.S. based scale.

Thanks

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KayBee

1083 posts in 2707 days


#3 posted 12-11-2009 07:55 PM

My experience with diamond said it’s rougher for listed grit. Every manufacturer/country has a little bit different it seems. But found this that says it’s about 1000 waterstone equivalent. Just have to check it to be sure.

http://www.sharpeningsupplies.com/Sharpening-Stone-Grit-Chart-W21C60.aspx

Hope this helps, figuring out sharpening is so fun! LOL

-- Karen - a little bit of stupid goes a long way

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HokieMojo

2103 posts in 3188 days


#4 posted 12-11-2009 09:07 PM

that looks like a great link. thanks so much!

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