Thread: J-Nat club

Finally got time to take pics of some more stones:
#1 A big botan nagura
#2 my go to Shobudani Asagi prepolisher
#3 Unknown ~3k stone, very nice on kamisoris, too slow for anything else.
#4 Aizu- this one is superb stone 1-3k range, very fast cutter
#5 Aizu, I use the back as lapping plate for the softer natural, the stone is very hard for such low grit
#6 Hideriyama - ~6k range , can be used as intermediate before a prepolisher
#7 Yaginoshima Asagi
#8,9 -Atagoyama Kiita , a true #24 size stone, which is my finest prepolisher, the black lines are not cracks.

those stones are HUGE!

I have two questions in regards to the Tomo Naguras:
1. Some of you guys dug some grooves, I assume to help in producing the slurry, what did you use? One of those small round chain-saw file?
2. Is there a reason why you shouldn't lap all sides of the Tomo Naguras?

Thanks!

The grooves on nagura stones are to reduce the drag. It's hard to lap/produce slurry of you use its flat surface for that.
For me, I use the side of my stones to make those grooves. 1000 grit or finer. Don't use something that's too coarse, there is a rumor that, this way big particles can brake off the grooves of stone and ruin your edge.
For Tsushima nagura stones, there is a possibility to develop cracks, that's why they are sealed with lacquer, and, it's better not to lap them. For the rest, lapping requires time, and removes precious stone, so, do as you want, no reason at all.

I lap my tomos on one side and I clean up one corner and round it. I use that for my slurries. You can also use a round carbide hacksaw blade or if its soft enough a round file.

I use the edge of a DMT to put grooves in my tomo's to reduce the tendency to "stick" to the stone. I do not, however, groove any of my mikawa nagura.

rs,
Tack

Of my Jnats, this is my favorite!: A Nakayama Maruichi Kitta Kan. A very hard and fine stone capable of a mirror or near to mirror finish with the correct slurry. It's 165 x 110 x 25mm. Sometimes you just like a stone....this is my "huckleberry"!!

Best Regards,

Howard

My first Jnat kit

Randomly what would you guys recommend for slurry and lapping. A dmt or atoma?

Originally Posted by basil

Randomly what would you guys recommend for slurry and lapping. A dmt or atoma?

I use Atoma.