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Flattening waterstones

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Forum topic by JSilverman posted 1052 days ago 3580 views 0 times favorited 25 replies Add to Favorites Watch
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JSilverman

87 posts in 1213 days


1052 days ago

How do you flatten your waterstones? I have a Norton flattening stone and dislike it (it needs to be flattened itself too much). And sandpaper on granite or glass is a pain.

Anyone try and like (or dislike) the new DMT Diaflat lapping plate?


25 replies so far

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TominTexas

42 posts in 1435 days


#1 posted 1051 days ago

I also have Norton waterstones and the Norton flattening stone – I agree, the flattening stone is about worthless – it quickly goes out of flat and can add to the aggravation of keeping the other stones flat. The only negative about the Dia Flat that I’ve read is its coarseness – others have reported that it leaves a flat surface but the coarse diamond grit scores the surface of fine waterstones leaving a less desireable surface for refining your edges – don’t know this from experience – it’s just what I’ve read.

The Dia Flat is pricey at nearly $200 so I don’t see one in my future. I’ll be curious to see the responses from others.

Regards
Tom

-- East Side of Big D

View Alster's profile

Alster

87 posts in 1813 days


#2 posted 1051 days ago

I read a book by a reputable, even well-known woodworker (just can’t remember who) who said that he flattens his waterstones against one another. Just a few quick passes after each tool is all it takes, and he made no mention of cross-contamination (which I think is probably a bit overblown, anyway). I’ve tried this, and it seems to work fine.

For what it’s worth, in the olden days they didn’t have dia-flats or flattening stones. They either rubbed one stone against another, or more likely, they used a stone that wasn’t perfectly flat. And they ended up with very sharp tools capable of turning out some spectacular work.

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ChuckM

496 posts in 2266 days


#3 posted 1051 days ago

Strictly by the wet/dry sandpaper on a thick glass plate method. Cheap but effective with my 100, 4000/8000 water stones. I do it often so each flattening time is short, as there`s little cave to remove. Use a straight edge to check the stones after each flattening.

-- The time I enjoy wasting is not time wasted

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ksSlim

956 posts in 1489 days


#4 posted 1051 days ago

Out of frustration with a purchased “flattening stone”, I tried the door stop (concrete block). Worked well.
Available at home centers everywhere, probably best to check with a straight edge for extreme flatness.
My neighbor uses the concrete on his driveway. He says the “oldtimers” used whatever was flat and “coarse enough”.

-- Sawdust and shavings are therapeutic

View SouthpawCA's profile

SouthpawCA

254 posts in 1832 days


#5 posted 1051 days ago

wet/dry sandpaper 600 grit on glass from the local auto supply store

-- Don

View woodjewelry's profile

woodjewelry

49 posts in 1507 days


#6 posted 1050 days ago

Me too, sandpaper on a glass plate, or rubbing against another stone.

-- Mark, Lithuania, http://www.woodworkers-online.com

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Rileysdad

110 posts in 1878 days


#7 posted 1050 days ago

Cut a 16” piece of 120 grit from a role and clamp one end to your jointer’s infeed table. No need to stick it down. Place stone near the clamped end a push. Reverse and repeat. A few passes should do it.

-- Measure twice, cut once, buy extra stock.

View Loren's profile

Loren

7235 posts in 2247 days


#8 posted 1050 days ago

I use a floor sanding screen on a cast iron or glass surface. MDF works too.

Long after the screen is too dull for sanding floors it works for waterstones. The
dust falls down in the square holes so flattening is quick indeed.

-- http://lawoodworking.com

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ksSlim

956 posts in 1489 days


#9 posted 1050 days ago

> Loren Doh, a Homer moment! Why didn’t I think of that? Great suggestion.

-- Sawdust and shavings are therapeutic

View Mark's profile

Mark

1787 posts in 1873 days


#10 posted 1050 days ago

i haven’t done it but when a buddy of mine (phenomenal woodworker/retired carpenter) bought me my 8000 grit he told me to sand it down with emery paper.

-- My purpose in life: Making sawdust

View Millo's profile

Millo

543 posts in 1649 days


#11 posted 1050 days ago

I just recently prepared my first chisels. Wow, tons of work on those backs, or it could very well be I am doing something wrong. Anyhow, I flatened the stones on sandpaper over a granite block.

I am considering the extra-coarse 8x3 DMT Dia-Sharp to cut the backs of these new Narex chisels a bit quicker (huge ripples on those backs), and to flatten my waterstones…. seems like it would be faster. Any ideas on how would these work?

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Millo

543 posts in 1649 days


#12 posted 1050 days ago

Don’t mean to hijack the topic, but: a question regarding waterstones that are kept in water (not the fine grits)—how often do you change the water in the container?

View Goodsh's profile

Goodsh

47 posts in 519 days


#13 posted 385 days ago

I just tried the sand screen and it worked great. Fast and cheaper than sandpaper. Nice idea!

View Pete Pedisich's profile

Pete Pedisich

126 posts in 1246 days


#14 posted 385 days ago

Millo, I use that one and it works great

View JADobson's profile

JADobson

280 posts in 710 days


#15 posted 385 days ago

Pete, thanks for resurecting this thread, I learnt a few things. I, like Goodsh, would be interested to know how often the water should be changed.

-- James

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