Thread: Japanese Nagura stone

Originally Posted by gary haywood

don't mean to be rude but don't quite under stand what your asking better explanation may help on both your posts

I imagine 325 gives good surface on your hones surface and laps fairly quik whilst the 1000 will smooth surface even better i'm just presuming but like i say 325dmtc works extremly well for me.

I was asking why are the surface scratches on a hone given such attention.

I have seen techniques that include progressive lapping and such to get to an apparently magical 1000 grit. If fineness is so important why is that fine enough?

Also do people treat coarser stones differently- finer lapping for finer stones?

Finally why would one consider sandpaper superior to using a flat stone?

Originally Posted by kevint

Finally why would one consider sandpaper superior to using a flat stone?

i can answer to this question . i said sandpaper because it is cheaper and available to most people. if you have norton go head use Norton. i never go until 1k grit i have gone 600 sandpaper that is it. i may need to try 1k maybe i will like the result.hope this clear 's my part.

I would use wet and dry sand paper i would use p600 on say 4k 8k 121 k ,coticules or my 325 as for a 1k i'd use 325 or 220 wet and dry. but to be onest 325 dmt is fine on every thing i did have norton flatterning stone it was good but the hone surface wheather it be 1k or 8k 4k etc was'nt as nice as the 325 dmt left i think most people on srp use dmtc it does'nt need lapping and its quik and easy it cleans your hones up in seconds synthetic that is. I just felt when honing i could feel the differance and i got realy good edges .

sand paper is cheaper but in the long run a dmtc would pay for its self./

Only don't use dmt 1200 and higher for lapping purposes. diamonds will get loose very fast.hope this helps.

Originally Posted by gary haywood

I will have to try norton 1k does it leave a smoother surface than dmtc?

I have not used a DMT 8C, which I understand to be a 325 grit, but I have used a EZ Lap 400 grit diamond hone.
I find the 1000 grit texture to be to my liking, it is nothing more than a personal preference. Some people like a 325 grit texture to start! Try both and see which you prefer.

Originally Posted by kevint

Finally why would one consider sandpaper superior to using a flat stone?

Sandpaper has more abrasive grains per square inch so it is faster plus you don't have to lap it!

Originally Posted by gary haywood

So could i hone my naniwas with 1k norton?

Why not? Just make sure the Norton 1000 is flat when you start.

Originally Posted by kevint

Why is a smooth beyond 325 grit surface needed, as well, for what grit stone? (keeping separate synthetic from high grade natural)

Smooth beyond 325 is not needed IMHO. It i just a personal preference. As you know the primary purpose of lapping is to flatten a hone. The other major benefit is to removed any embedded swarf ( junk) left over from previous honing sessions. Along the way you find that it is nice to start from the same texture each time. Which texture and on which hone is a personal decision.

Just my $.02,