Thread: Big trouble with Naniwa Superstones 10000 and 12000

This looks like a pressure problem to me. Go back to 1000 grit and create a chip free bevel. Then progress to the 12k using very light pressure and the results should be fine.

Originally Posted by Gammaray

This looks like a pressure problem to me. Go back to 1000 grit and create a chip free bevel. Then progress to the 12k using very light pressure and the results should be fine.

I can use heavy pressure on the 8k, why should I not be able to use pressure on the 10 or 12k? I know what You mean, but if there is something in the way, it's doing no good to the edge. Using light or no pressure the harm is just a little less.

The second image of the op has been taken after strokes with basicly blade weight only.

Originally Posted by DDTech

I can use heavy pressure on the 8k, why should I not be able to use pressure on the 10 or 12k? I know what You mean, but if there is something in the way, it's doing no good to the edge. Using light or no pressure the harm is just a little less.

You can't use heavy pressure in high grits because the edge will chip randomly as it has become so fine. You may even loosen larger particles from the stone with pressure. Chips & larger stone particles in the swarf could cause the problems you see.

Your 8k pics don't look too bad but the lone chip in pic 2 could be a result of the pressure you claim you can use on the 8k. I have seen one of my hone jobs come back with chips after heavy stropping by the customer so it is easily possible to cause damage on the stones..

Do you have any razors with a known good edge ? You could simply try a few light strokes on the 12k & see if any damage occurs. That could rule out the stone or identify it as a problem.

Originally Posted by onimaru55

... Do you have any razors with a known good edge ? You could simply try a few light strokes on the 12k & see if any damage occurs. That could rule out the stone or identify it as a problem.

Not really, but I tried that with my tests... about to write.

I don't know how relevant it is to the Naniwa Superstones but how is it with the soaking, some stones get behavioral issues from excessive soaking.

Originally Posted by Lemur

I don't know how relevant it is to the Naniwa Superstones but how is it with the soaking, some stones get behavioral issues from excessive soaking.

Naniwas do not need to be soaked. Normally I thoroughly wash them when I start honing and spray them every now and then so that they can absorb what they need. Sometimes I put them under water for something like five or two minutes but they don't "bubble" at all.