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Thread: Chinese 12k stone - Over 2.5 hours to lap ! ! !

  1. #21
    Lookin like a crim baldy's Avatar
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    Quote Originally Posted by Str8Raz0r View Post
    I picked up a 12k from Carbatec a couple of months ago and it was almost perfectly flat.
    Me too, fortunately, I think I would have snapped long before reaching the 2.5 hour mark.
    Grant
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  2. #22
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    Sounds like you got unlucky. I bought one from Woodcraft and it lapped flat with minimal effort.

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    Senior Member Sasquatch's Avatar
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    I just got one of these off the Polish chap on ebay and I'm loath to lap it as it already looks like it's finished on one side. I've read loads of posts saying to lap them even if they look good so I will but mine's so nice and flat and shiny! Bad luck there, at least you know a shortcut and got there in the end!

  4. #24
    Senior Member Brighty83's Avatar
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    Quote Originally Posted by Sasquatch View Post
    I just got one of these off the Polish chap on ebay and I'm loath to lap it as it already looks like it's finished on one side. I've read loads of posts saying to lap them even if they look good so I will but mine's so nice and flat and shiny! Bad luck there, at least you know a shortcut and got there in the end!
    I'm guessing it's from the same person open_razor?

    Make sure it is flat. I sent the guy the photos to show how far it is out as he advertises that it is lapped.
    Last edited by Brighty83; 07-26-2011 at 02:31 PM.

  5. #25
    Senior Member Sasquatch's Avatar
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    Quote Originally Posted by Brighty83 View Post
    I'm guessing it's from the same person open_razor?

    Make sure it is flat. I sent the guy the photos to show how far it is out as he advertises that it is lapped.
    Yup, same fella. After all I've read I'll definately lap it first but it does look so nice and smooth and shiny! You're right to send him pics as it shouldn't be advertised as lapped if it isn't flat. I'll see how far out mine is and contact him if it's bad but I don't think it'll take much at all to be honest.

  6. #26
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    i bought one from him on 7/20.... waiting for it to arrive... HOPE it doesn't take 2hrs to lap... but i have no problem using the belt or 12" disc sander to cheat on the lapping.... *(with proper respiratory protection.... and a condom on just to be safe)....

  7. #27
    Senior Member rodb's Avatar
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    I've got two that were purchased at Woodcraft Hobby and both were very close to flat and didn't need more than a DMT325 to get the job done. I'm liking the disk sander idea for problem stones.

  8. #28
    This is not my actual head. HNSB's Avatar
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    I fixed up a severely dished coticule in about two minutes with a belt sander. The dust was unreal. I have never sanded anything else that was even close to being that dusty.

    Strange women lying in ponds distributing swords is no basis for a system of government.

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    Senior Member Kingfish's Avatar
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    Quote Originally Posted by MickRussell View Post
    I just a little surprised the stone was SO out of shape. I thought they were supposedly lapped flat before sale. Apparently not so much.
    I have lapped a couple of them from some years back and they were not that bad. Brighty's stone falls into the hand carved categorie making it very special!

    Does make one appreciative modern abrasives, can you imagine pre-synthetic abrasive aged craftsmen lapping novaculite?

  10. #30
    Norton convert Blix's Avatar
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    I've bought two C12K's from that Polish seller, one 150x50mm and a 8x3", interestingly the small one took 2+ hours to lap, the 8x3" around 90 minutes, both using a DMT 325.
    The large one is superior, very nice and sharp edges off it, yet quite smooth. I think I got a good one.

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