Thread: Lapping Naniwa 12k

I ordered a Naniwa 12k from SRD. I already have a Norton lapping stone and have a DMT 325 on it's way. Would either or both of these be a good toolfor lapping the Naniwa or should I use another method?

DMT 325 - Yes
Norton lapping stone - no

Originally Posted by Danricgro

I ordered a Naniwa 12k from SRD. I already have a Norton lapping stone and have a DMT 325 on it's way. Would either or both of these be a good toolfor lapping the Naniwa or should I use another method?

A DMT D8C 325 is fine for lapping any waterstone IME. I wouldn't use the norton at all unless that was all I had. I always lap under the tap with a trickle of water running down to facilitate swarf removal.

Don't use the Norton Lapping Plate.

The DMT will work fine. Make sure the Naniwa is plenty wet as well as the DMT and lap under running water as the 12K will want to stick to the Naniwa if you don't. I use the DMT 325 all the time with the Naniwa Super Stones and it works very well.

Have fun,

Lynn

Lynn, I know that Naniwa has two lappers that look fairly similar to the Norton. Are they significantly different from the Norton? I assume one is for the finer end of the Naniwa line and the other for the more coarse ones. Is your advice because the Norton is too coarse?

Edit: THIS is a recent thread about the Naniwa lappers that got me wondering about this.

Another +1 for the DMT 325 here. Thats a really great versatile stone!

I use that one stone to lap everything from 1k Shapton and Naniwa's up to high end finishers like Charnley Forest and Nakayama Maruichi. It works great on all of them.

Good Deal. i just ordered the DMT D8C 325. Thanks for the advice.

Originally Posted by gssixgun

The DMT325 is good down to a Naniwa 400 IME I would not go to low with it, because the lower grit can rip diamonds loose from the metal

I'm really not trying to be petty here, but just so people understand...
What happens is that the larger grit of the lower grit hones can extend beyond the diamonds to undercut the metal holding the diamonds in place, so the lower grip rips the metal from the diamonds, not the other way around.

I don't have the technical explanation, but the Norton plate is not as grainey as the stuff on the Naniwa plates and it gunks up on a Naniwa. The Naniwa plates work find for the Naniwa's and the Norton plates work fine on the Norton. The GDLP is the best for all around, but expensive. The DMT is the next best all around solution, but because it doesn't have the grooving the GDLP has you have to keep it under running water on the higher grit Naniwa's so they stick to each other less. I have never been a sandpaper fan, so not much for me to comment on there.

Have fun,

Lynn

Wow, you guys are fast! I am glad I asked, probably would have tried out the Norton plate on the Naniwa. Just out of curiosity, why would the Norton plate not be a good idea with the Nawina 12k?