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9LikesThread: Lapping Stone
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02-24-2013, 07:09 PM #1Senior Member
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The problem with the norton lapping stone is that it needs to be lapped. The DMT comes flat and doesn't need to be lapped after use. DMT is the better way to go
gooser likes this.
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02-24-2013, 09:15 PM #2Senior Member
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Both the norton and the dmt325 are too coarse for the naniwa 12k. Lap the naniwa with them, but then give a short pass on wet sandpaper 600 .
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02-25-2013, 12:33 AM #3Razor Vulture
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I tend to agree. I have been using a worn smooth DMT for a very long time with great results, but not a newer one! Too rough! I sort of ruined the DMT by lapping some barber hones. Turned out pretty slick and perfect for the Nortons and Naniwas!
Originally Posted by Sterm
Geezer likes this."Don't be stubborn. You are missing out."
I rest my case.
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02-25-2013, 08:26 PM #4Senior Member
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So I just hung up with the fellows from SRD and it seems like all is well.
It's okay to Lapp all hones with the norton lapping stone or with the DMT it's personal oppion. Some believe the norton is a great choice others agree with the DMT
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02-26-2013, 05:22 PM #5Junior Member
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Glad you worked this out. I used my DMT 160 DiaFlat lapping plate to lap the Norton Lapping Stone. Now use both for lapping other stones. I think the Norton may be coarser than 160 grit. I always finish with 220, 400, 600, 800, 1200 sandpaper on my Norton 4000/8000 and my JNS. Smooth as a baby's butt.
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02-26-2013, 06:10 PM #6Senior Member
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Holy smokes!! So mean to tell me after I lap the stones I should go over them with sandpaper as well?? Originally Posted by old
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02-26-2013, 06:13 PM #7Poor Fit
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The Norton is about 220grit IMO. I have a DMT220 as well and find the scratch patterns are quite similar, the DMT is more true however. I as well as others have question the flatness of the Norton Stone. If you want a smoother finish on your stones then you will need to use sandpaper, a good way to do it is to lay the paper on top of the DMT. Hope this helps
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