Lapping Naniwa 12k

**Danricgro** · 09-24-2010, 05:26 PM

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?

**Slartibartfast** · 09-24-2010, 05:27 PM

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?

**JimmyHAD** · 09-24-2010, 05:28 PM

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.

**Lynn** · 09-24-2010, 05:28 PM

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

**Utopian** · 09-24-2010, 05:32 PM

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.

**Danricgro** · 09-24-2010, 05:35 PM

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?

**Utopian** · 09-24-2010, 05:45 PM

Until Lynn chimes in, I'm going to speculate that it is too coarse for that Naniwa. It might be okay for some of the lower grits but not the higher grit ones like the 12k.

**Deckard** · 09-24-2010, 10:06 PM

Hi'
I lap mine on 400 grit wet & dry on a piece of flat Glass, comes up pretty good. I for sure would not use the norton, it's rubbish and will not itself stay flat for toffee (English colloquialism). I'm sure the DMT will be a good bet.

**grimlad** · 09-24-2010, 10:58 PM

I use the DMT 325 on my N12K and it works fine. But like Lynn said, you have to use running water, because they will really start to stick together (just did mine last weekend).

**RKP** · 09-25-2010, 12:14 AM

I just picked up a DMT 325 for my Naniwa super stones.

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