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Hi I just got a naniwa 12k stone a week or 2 ago. I also bought a Norton flattening stone. I lapped the naniwa and refreshed my blade (7 swipes) then put it away. Then the next time I went to use it because I wanted to freshen the blade again cause I started head shaving as well I noticed the naniwa was bowed? When I place it on the flattening stone the center is lower than the ends. Is this normal?
Doesn't sound quite right to me. Have you soaked or left it out in the hot sun for a long time?
No I left it on the counter to dry then put it back in its box and stored on top of the cabinet in my kitchen so the kids can't reach it
I would check and make sure the Norton stone is flat. I think that stone is pretty much worthless. Mine wasn't flat. I ended up buying a DMT and never regretted it. Sand paper on a flat surface would probably work better than the Norton.
Yes, the Norton lapping hone has to be lapped flat--ridiculous but true.
Click HERE for an old thread about this issue. Basically you have to handle your hone the same way regarding wetting each time for the sake of consistency. A hone that is higher in the middle is not a bad thing and personally, I would not bother to lap it away. It will wear down with use.
If you cant get on with your norton. Put some pencil grid lines on your 12k and lap on some wet'n'dry, do this a few times to double check.
Again lapping plates do not always start off flat.
If your still having beef contact the vendor.
Mines is lower in the middle
How badly is it warped? If its a little you can lap it a bit. Lap it on wet and dry paper, the Norton stone is junk. Your first post said its higher in the middle. Like Utopian said you can just use it like that it will wear in. It would bother me so I would lap it. Don't soak these stones they will warp. Good luck.
Yeah, kind of an interesting contradiction that you have to lap your lapping stone before it's any good. Now that mine has been lapped flat and broken in it's pretty good, but I wouldn't use one the way they are out of the box. You also have to keep it flat as you use it, hard naturals will make it dish out pretty quickly. Live & learn. :shrug:
Naniwa's warp. I used to own Naniwa's that need to be lapped every time before use because the center would be higher then the ends. I lapped on a DMT dia flat which is guaranteed to .0005".
It drove me crazy but I guess some do some don't. I'll look for the thread if you search naniwa warping you might find it.
I
The Norton lapping hone was never designed to lap any natural hones at all. It only is meant to be used on synthetic hones.Quote:
Originally Posted by Marshal
Interesting. I will try to do this from now on. So if I lapped the naniwa under continuous running water should I use it soaked?Quote:
Originally Posted by Utopian
It warped the opposite of yours in that thread. The side I lapped the ends warped up. It was noticeable. I could feel it when honing my blade the blade would hit towards the end of the stroke. And when placing it on a flat surface the ends were almost 1/16 off. I lapped it but took a while. I will try the suggestions from that post
Quote:
Originally Posted by Hacker7
Sorry meant lower in the middle. But not from normal use. When placed on a flat surface the nods of the stone would be a little off the flat surface. I did lap it yesterday because I needed to use it. But will try out the suggestions in Utopians post
Either first make sure that your lapping hone is flat or else use w/d sandpaper on a flat surface.
I will do that before I lapp again. Thanks for all the suggestions!
I don't alway hone but when I do I don't use the norton lapping stone[emoji1] . In all seriousness I almost got the norton lapping stone but thanks to the good folks here was steered away and bought a dmt 325. I figure with the amount of honing I do that will last me forever plus I tend to make a mess with everything so the wet/dry may get the misses a bit upset when I destroy the kitchen counter. Happy shaving.
Phil
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Yes, pretty normal with most synthetic stones, they do move in the drying/ wetting cycles and are only flat after you flatten them, (grid lap them).
But it’s no big deal. I lap them flat, when I first get them, then just lap them before use after soaking, if needed. I do a quick lap between use, more to clean and remove the skin, (you can see a darker color change, in the stone), swarf and glazing, than to flatten. Just a few quick laps.
Most of my synthetics were grid lapped flat when new and never have been since or just for demonstration purposes.
You want smooth, don’t worry about flat, or you will just lap a lot of good stone down the drain. But if it makes you happy, lap away.
The Norton lapping stone is a pain to use and very messy. A diamond lapping plate in the 300-400 grit range is much quicker, cleaner and more efficient.
Thanks. Right now I only have the naniwa12k just for refreshing. But lapped the stone because the way it warped my razor kept digging in on the ends of the stone even with no pressure the blade would hit.Quote:
Originally Posted by Euclid440
It sounds like you may have other issues with the razor not the stone. Where is the blade hitting the stone?
It is almost impossible for a stone to warp a razor.
What kind of razor are you honing, and what was the condition of the razor?
Post some photos of the razor and the stone face.
The hone is warped. OP has given no indication that the razor is warped.
Relax, Dude…
Perhaps… you may want to actually, read his post, before answering, knee jerk.
“But lapped the stone because the way it warped my razor”.
Just saying.
That's basically what I was getting at. I destroyed my first Norton lapping stone doing exactly that. Was meant to be read as 'don't use with naturals.'Quote:
Originally Posted by Utopian
Here is another thread about this, and what I did with my Naniwas to remedy it.http://straightrazorpalace.com/hones...blization.html
Sorry Euclid440. It should be read as the way the stone warped; my razor would dig into the stone towards the ends of the stone. The ends of the stone is warped upwards a little.Quote:
Originally Posted by Euclid440
Sorry for the confusion.
I was thinking the same thing after reading Utopians link. Think liquid nail would work gluing it to tile?Quote:
Originally Posted by bluesman7
I would use 3M 5200 or better yet Locktite makes a construction adhesive called PL I think.
To answer an earlier question yes you can use the hone soaked.
I have found that for me, in Colorado, that the less water I expose the hones to, the flatter they stay. I use them splash and go and squeegee them off as soon as I stop using them including even short breaks like going to the microscope. It seems like uneven water absorption is what causes the warping, so my idea is to keep absorption to a minimum. I think our dry climate in Colorado is part of the problem. YMMV
Also it seems that as time goes on the warping is almost not an issue. How much of that is due to my mitigation efforts and how much is the hone coming into equilibrium from exposure to the same conditions is unknown.
At the last Denver meet someone had brought in an un backed Naniwa 12k SP. It showed about 1mm of dish against a straight edge. I said "now watch this" and wetted the face of the hone. Within a few minutes the hone was flat, to everyone's amazement but mine.