Use a black silicone carbide stone for flattening waterstone

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Forum topic by dinu posted 11-23-2017 04:20 AM 1816 views 0 times favorited 2 replies Add to Favorites Watch
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6 posts in 949 days

11-23-2017 04:20 AM


I have been using sandpaper on glass for sharpening edge tools for some time. Recently I bought a couple of ceramic waterstones from TFJ. I now need a way to flatten the waterstones. Right now I don’t have budget to buy a diamond plate for this. I was wondering whether I can use the two sided (240/400) silicone carbide stones I have lying around for this? If yes, would a 6” x 2” stone be large enough to flatten a 8”x3” waterstone or must I have larger ones?

I would appreciate any thoughts on this very much.


2 replies so far

View Kelly's profile


2639 posts in 3554 days

#1 posted 02-24-2018 08:20 AM

I just bought the bag of grit from Edge Pro. It was cheap, works good and works fast.

I have several pieces of free granite I picked up from granite places, rather than glass.

Yes, you can use stones, but the grit on the stone might work better (or not). Just bag it back when done for the next round.

View Lazyman's profile


4545 posts in 1997 days

#2 posted 02-24-2018 01:55 PM

I saw a tip from Woodsmith Magazine a while back to use drywall sanding screen to flatten water stones. I haven’t tried it yet but that would be a really cheap way to do it.

Edit: I would think that whatever you use should be larger than the stone you are flattening; otherwise, you risk rounding over the edges or possibly just have the end of the stone following the dished surface you are trying to eliminate.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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