Ultrasharp diamond stone trouble?

A

AlexSav

Joined
Apr 23, 2020
Messages
69
So I recently bought 2 stones 1 Norton IB8 and a ultra sharp 400/1000 grit diamond stone, first time sharping, decided to try freehand and after I was done and cleaned it there are these dark spots on the stone on the 400 grit side only and they are freaking me out, is it possible the diamond came off or something I even grabbed a toothbrush and using soapy water cleaned it up.
Any suggestions? I can return so should I ?
I link a couple pictures.
Cr9IBCB
WKxXdfk
https://imgur.com/a/WKxXdfk
https://m.imgur.com/a/Cr9IBCB
Not sure how these pictures work sorry
 
AlexSav said:
So I recently bought 2 stones 1 Norton IB8 and a ultra sharp 400/1000 grit diamond stone, first time sharping, decided to try freehand and after I was done and cleaned it there are these dark spots on the stone on the 400 grit side only and they are freaking me out, is it possible the diamond came off or something I even grabbed a toothbrush and using soapy water cleaned it up.
Any suggestions? I can return so should I ?
I link a couple pictures.
Cr9IBCB
WKxXdfk
https://imgur.com/a/WKxXdfk
https://m.imgur.com/a/Cr9IBCB
Not sure how these pictures work sorry
Click to expand...
I get spots like that on mine if it gets cross contaminated with honing oil - a tiny amount can do it. If so a little rubbing or denatured alcohol cleans it right off.
 
HeavyHanded said:
I get spots like that on mine if it gets cross contaminated with honing oil - a tiny amount can do it. If so a little rubbing or denatured alcohol cleans it right off.
Click to expand...
Hello, heavy-handed thanks for responding gonna go try rubbing alcohol and tell you what happens I dont even have honing oil but it's worth a try
Thanks
 
HeavyHanded said:
I get spots like that on mine if it gets cross contaminated with honing oil - a tiny amount can do it. If so a little rubbing or denatured alcohol cleans it right off.
Click to expand...
So I tried it and sadly it did nothing I'm pretty sure so I'm just gonna with asking for a replacement stone hopefully, thanks for the help anyway
 
Just out of curiosity, how much pressure are you using? I know you can't be specific but would you say light, firm, moderate, heavy?
 
AlexSav said:
Firm mostly, I was trying to do light but kept getting carried away
Click to expand...
That is probably the issue right there. Using heavy pressure on diamond plates dislodges the diamond particles from the substrate that it's bonded too (i.e Nickel or Steel). This leaves parts of the stone that no longer have diamonds. This can happen with any diamond plate but more easily with cheaper plates as the methods of bonding and diamond type they use can have an impact on it's resistance to coming loose.

Remember next time. Let the diamonds do the work. You may not be able to return it, but good luck if you do try!
 
I see
NortonIndia said:
That is probably the issue right there. Using heavy pressure on diamond plates dislodges the diamond particles from the substrate that it's bonded too (i.e Nickel or Steel). This leaves parts of the stone that no longer have diamonds. This can happen with any diamond plate but more easily with cheaper plates as the methods of bonding and diamond type they use can have an impact on it's resistance to coming loose.

Remember next time. Let the diamonds do the work. You may not be able to return it, but good luck if you do try!
Click to expand...
I see I hope the let me return it they say lifetime warranty so hopefully, thanks for the explanation though
 
Were you working carbon steel on this plate? Spots of rust can appear that way. Unless you were really digging into the stone, like trying to repair a broken tip and becoming frustrated (the stone is too fine for that), it shouldn't be possible to damage a well made plate that fast.

Look at the spots under whatever magnification you have and see if any material appears to be missing. It is possible for the plating to flake off like cheap chrome but I have never had that happen, and that doesn't appear to be what your photos show.
 
Mr.Wizard said:
Were you working carbon steel on this plate? Spots of rust can appear that way. Unless you were really digging into the stone, like trying to repair a broken tip and becoming frustrated (the stone is too fine for that), it shouldn't be possible to damage a well made plate that fast.

Look at the spots under whatever magnification you have and see if any material appears to be missing. It is possible for the plating to flake off like cheap chrome but I have never had that happen, and that doesn't appear to be what your photos show.
Click to expand...
Doesn't seem to be flaking not sure what it is honestly
 
Yeah, to me it just looks like some kind of discoloration. You can see streaks in some areas too. It doesn't look terminal and I'd probably just use them. But, I'm also just looking at a couple pictures and not in person.
 
Eli Chaps said:
Yeah, to me it just looks like some kind of discoloration. You can see streaks in some areas too. It doesn't look terminal and I'd probably just use them. But, I'm also just looking at a couple pictures and not in person.
Click to expand...

This^.
I'd just use it. There is no way you blew out massive amounts of diamonds and produced that discoloration.
Barkeepers Friend would be my next move, but in the interim I'd just use it.
 
Ye
Eli Chaps said:
Yeah, to me it just looks like some kind of discoloration. You can see streaks in some areas too. It doesn't look terminal and I'd probably just use them. But, I'm also just looking at a couple pictures and not in person.
Click to expand...
Yea thanks for the help, I went ahead and sharpened another knife and I think it worked fone, I'm just gonna go with it and if they still send a replacement stone I'll take it otherwise will keep this one
 
Are you using any kind of lubricant? Some folks like water, some Windex and some a little oil. It can help float the swarf and keep it from settling into the stone.
 
HeavyHanded said:
This^.
I'd just use it. There is no way you blew out massive amounts of diamonds and produced that discoloration.
Barkeepers Friend would be my next move, but in the interim I'd just use it.
Click to expand...
Allright will keep probably using it and if they send a replacement then I'll grab if not I think it still works, sharpened a knife seemed fine it hink.
 
Mr.Wizard said:
Were you working carbon steel on this plate? Spots of rust can appear that way. Unless you were really digging into the stone, like trying to repair a broken tip and becoming frustrated (the stone is too fine for that), it shouldn't be possible to damage a well made plate that fast.

Look at the spots under whatever magnification you have and see if any material appears to be missing. It is possible for the plating to flake off like cheap chrome but I have never had that happen, and that doesn't appear to be what your photos show.
Click to expand...
We are assuming the ultra sharp is as well made as a DMT or Atoma. It’s probably one of the cheap Chinese diamond plates. You can with heavy pressure strip those.

I had one and lapped a Norton India with one side and it got similar discolouration.
 
NortonIndia said:
We are assuming the ultra sharp is as well made as a DMT or Atoma. It’s probably one of the cheap Chinese diamond plates. You can with heavy pressure strip those.
Click to expand...

I'm not assuming anything. I own Ultra Sharp stones. They are well made.
 
Eli Chaps said:
I'm not assuming anything. I own Ultra Sharp stones. They are well made.
Click to expand...
Yea got reccomded one here like a week ago so I just sharpened a knife and it seems the dots are less visible now? So not sure what to say but yea
 
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