Thread: What to get for Flattening - Granite + Sandpaper or DMTd8c

Originally Posted by Phrank

For lapping I picked this up, a Naniwa Flattening Stone, they are fairly inexpensive:

Naniwa Flattening Stone

Mind you, I'm not by any means someone who spends lots of time honing. I've lapped my Norton 4/8 twice, and my Nani 12k twice, using the pencil grid. I really only refresh my blades using the Nani 12k, but this Flattening stone worked fine.

Just another option....

Like have the Norton version of this. The consensus seems to be the ,,,DMT. Any reason why these style stones are out of fashion?

I have the Norton flattening plate, they are slow, messy and leave grit all over the stone.

The DMT or any diamond plate is a much better solution.

Well I just put the DMT on my Christmas list now hopefully I'll get one.

I just recently got a Norton 4/8 and what I found interesting is that in the pamphlet that came with it Norton recommends lapping the 4k/8k stone at 400-600 grit and the 220/1k stone at 220 grit. I'm not sure what the advertised grit of the lapping plate is but I think I recall seeing 220 somewhere. Strange they would recommend two different grits for lapping but package the set they sell with a one size fits all flattening stone.

In any case I used a broken in DMT D8C which I figured was close enough to 400 grit. Worked like a charm and it's amazing how much these smooth out from the factory with a good lapping.

Originally Posted by WizardWG4

I just recently got a Norton 4/8 and what I found interesting is that in the pamphlet that came with it Norton recommends lapping the 4k/8k stone at 400-600 grit and the 220/1k stone at 220 grit. I'm not sure what the advertised grit of the lapping plate is but I think I recall seeing 220 somewhere. Strange they would recommend two different grits for lapping but package the set they sell with a one size fits all flattening stone.

In any case I used a broken in DMT D8C which I figured was close enough to 400 grit. Worked like a charm and it's amazing how much these smooth out from the factory with a good lapping.

Yeah the DMT is about middle of the road to the recommendations with the d8c being 325. The Lapping plate is I think 160, while the d8f is 600. so you can pick your poison. I think the reason that everyone gets the d8c, as I have been looking for the past 2 days, is simply because it is a middle of the road grit that works fast but smooth. But if we want smoother the d8f I would assume would be the way to go.

What's everyone else's thoughts on using the d8f on the 4k/8k?

Originally Posted by rlmnshvstr8

What's everyone else's thoughts on using the d8f on the 4k/8k?

Waterstones in general are soft enough that going any higher then about 400 really doesn't give any advantage to the edge.. You have to remember that they actually work by releasing/exposing new grit..

Now Oilstones are a different story the higher they are lapped and burnished the finer finish they give..

Many will argue this all day with different opinions, about all kinds of different rocks

It does actually work to give a better finish even on water stones, but the effect doesn't last long for the reason Glen mentioned. For knife sharpening it would be worthless, but for razor honing it can last long enough to be of use on stones like the Shapton Pro line as long as only very light, even pressure is used and only for so many strokes. Once even one bit of abrasive/binder breaks loose though, the whole surface will rapidly revert to the stone's natural texture.