Thread: Jnat finishing

Originally Posted by onimaru55

A well worn DMT will leave a Jnat like glass. An Atoma 1200 not quite that smooth. Have used both for years. Never seen a chipped or dented edge.

One thing to watch out for, wait for it, is pressure. Both with Nagura & diamond plates. Many of the problems people may experience can be alleviated with lighter pressure.

At the other extreme Nagura can release sandy or gritty particles also, which will damage an edge. Here a quality Nagura may be in order but again pressure can fracture large pieces off & cause problems.

This whole debate can be likened to the fishing fraternity where some believe high tide will result in more catches & some believe low tide is best.
The skill of the individual in a particular scenario plays a bigger role.

+100%

Add in the fact that the stones themselves complicate the results because they are variable and you get our wonderful SRP saying of YMMV

Too many variables to call it other then on an individual basis..

To close, My very well worn DMT 325 which I have proved at the meets to leave a near glass finish on hones works absolute wonders when I use it on my Nakayama then work the slurry until near dry and finish with super light laps to take only the fin to a mirror like finish leaving a beautiful haze on the rest of the bevel

I would just keep messing with it until you find what works best for you and your techniques..

+++1 too

If you work the slurry long enough with an "extra fine" DMT - what ever that is... You get a very fine and smooth slurry - and I also have never seen any scratches on my JNats nor do I get even nanochips in the finished edge.

John

I always use slurry on my asagi (mined ca. 1880 according to Alex) & get my best edges doing this, working the slurry until almost dry. I never dilute (found no benefit) & find the edges on water not as nice. For slurry, I use my well worn DMT 325 & find this gives the best, most consistent results. I do have a matched tomo as well but rarely use it.

+1 on watching pressure. I did an experiment using pressure followed by no pressure on both the tomo & DMT. In both cases when pressure was applied, the edge was no good. When no pressure was used, the edges were excellent. In fact, I liked the edge off the DMT slurry the best.