CBN wheels

I found this with Google;

Yes, CBN grinding wheels from China can be good, but quality can vary. While some may be of excellent quality, others may have issues with balance, durability, or performance. It's important to choose reputable manufacturers or sellers to ensure you're getting a quality product. 
Here's a more detailed look:
Factors to Consider:

Tips for Buying:

In conclusion, while CBN wheels from China can be a good option, it's important to be discerning and choose products from reputable sources to ensure quality and performance. 

https://www.google.com/search?q=are+cbn+grinding+wheels+from+china+any+good&num=10&newwindow=1&client=tablet-android-samsung-rvo1&sca_esv=51d9b77a6ad9dc03&biw=1280&bih=632&ei=A-MgaKGFBvrlwN4PmeSMyAU&oq=are+CBN+grinding+wheels+from+China+any&gs_lp=Egxnd3Mtd2l6LXNlcnAiJmFyZSBDQk4gZ3JpbmRpbmcgd2hlZWxzIGZyb20gQ2hpbmEgYW55KgIIADIFECEYoAFIgVdQlAlYhk5wAXgAkAEAmAGWAaABuguqAQQyLjExuAEByAEA-AEBmAIOoALtDMICDhAAGIAEGLADGIYDGIoFwgILEAAYgAQYsAMYogTCAgsQABiwAxiiBBiJBcICBRAhGKsCwgIGEAAYFhgewgILEAAYgAQYhgMYigXCAggQABiiBBiJBcICCBAAGIAEGKIEmAMAiAYBkAYFkgcEMS4xM6AHsz2yBwQwLjEzuAfcDMIHBTItNS45yAeCAQ&sclient=gws-wiz-serp

I don’t know if you’re supposed to use a CBN wheel on a full speed grinder. I thought they were really only designed for slow speed? I could be wrong. 

Thanks for all the input Oldtool! 

Thanks Ryan... you make a good point. I'll check that out. 

CBN (Cubic Boron Nitride) grinding wheel is very suitable for use on high-speed grinding machines. CBN is a synthetic material with a high hardness. CBN wheels are designed to grind HSS and other metals with a hardness above 54 HRC (Rockwell scale). Do not use with softer materials.

The wheel has a steel base with a CBN coating. The steel base prevents the wheel from deforming. The wheel also does not need to be flattened and does not produce dust, unlike bonded stones. CBN wheels last a very long time, provided you use the wheel correctly.

CBN wheels remove material very effectively. Little force is needed to achieve a sharp result. Use minimal pressure when grinding to prevent the wheel and your material from overheating. You apply the right amount of pressure when the material is barely warm.

Use CBN grinding stones dry, so without water. You can use the wheel on your bench grinder or on your wood lathe with a speed between 1400 and 3000 rpm. (Dia 150) Use a suitable adapter sleeve for your machine. When using a arbor on the lathe, a speed of 1700-2000 rpm is recommended.

In all Far east offers I read mostly CBN diamond. That makes me wonder what is it. Is it CBN or is it diamond or are they using the terminology wrong. In short I don't know what I'm buying.

I think this is where I got mine from, but maybe not…it’s been a while. It’s a good explanation, none the less. 

I use CBN wheels to sharpen my HHS turning tools.  I use them on a RIKON slow speed grinder and have had little or no "blueing" issues.  i would imagine that they are compatible with any grinder but still be watchful that the steel doesn't overheat and blue.   

Interesting article on CBN wheels in the latest FWW mag. 

Would this be the article?

Yup!
Makes me think they are more forgiving than advertised. 
Given the cost, I find the grit info useful so as to not worry about buying a wide range.

I was thinking about buying an 80 grit. But after reading the article I'm moving towards the 180 grit. LV has them but they ain't cheap. But the quality is good. I've seen them. They are cheaper on Amazon but I can't vouch for quality. 

That's what I was thinking, 180.
LV typically is quality and has a great CS/return policy.

You are correct about LV. When I worked there the CS was unbelievable!  Once an elderly lady that I attended, returned a broken LV shovel after having it for 10 years. She really loved it. So we replaced it for free. I've seen unbeatable CS at Lee Valley many many times like this. No questions asked. Just great service. Truly something to think about when buying. 

Rick, thanks for that article, I had never considered one, now I'm not sure. I've used my grinder more in the last month than since I bought it 15 years ago or so, doing a lot of grinding anyhow. Spring brings mower blades, sharpening all of the garden knives, also going through all of the chisels touching them up, and finding many many that need to be taken down, so I can build an edge back that is worth snot. A person would think I been using them to open paint cans, but White Oak, Hard Maple, and Osage Orange all beat the crap out of the edges. 

I agree with LV, CS being way over what you generally find in our NO world. Always friendly, and helpful for me.

You're welcome George! Yeah... it's getting harder and harder not to get one. They are a charm to use. Steel keeps cool while grinding and you don't have to water dip. I've used them many times. My problem is that I have a cheapo 6" Ryobi grinder. Don't get me wrong the grinder work fine. But it only cost me ~$75. I have a hard time putting a $125 - $150 CBN wheel on it. I guess I'm close to taking the plunge. *sigh*

I see POS Whoopty cars worth 50 bux, all the time with $2,000.0 worth of wheels on them, and stereos, and speakers almost as much. On a good day, it's all about if it works for you. 

My 14" Bandsaw is a HF POS, that I have replaced all of the hardware, and motor and drive parts on it, and Carterized it to the point where it's as good as a Powermatic. I know this because for a long while I owned a Powermatic 14" back when they didn't cost thousands of $$$$.

I have had CBN wheels for about 7 or 8 years now....let me tell you they are great.  However....they are designed for HSS steel ONLY..... ie: lathe tools and basically nothing else.   I have a genius nephew that used my shop in my absence, I have 4 bench grinders and only one with the CBN wheels.....he decided to use the "fancy wheels" on normal steel and stripped most of the diamond coating off them.  He was "sure sorry", but broke...I changed the code to the door.....

In the words of Senator Kennedy of Louisiana...he is the reason there is instructions on a shampoo bottle.

I have a couple CBN's on my variable speed (0-2,400 RPM), reversible 3/4 hp, four wheel grinder.  Love them, but always use them at around 300-500 RPM.

IF I were using them on a high speed grinder, I'd go with a finer grit, to lessen material loss, and to reduce the danger of overheating.     

SIDE NOTE:  M2 and other metals that play well with CBN should never be quenched. It fractures them.