Abrasion resistance and hardness are very important properties of an abrasive. Both Diamond and CBN Grinding Wheels are almost equal, but CBN becomes the superior abrasive product when looking at the benefits more in depth.
CBN Grinding Wheels
The crystal structure of Diamond and CBN is very similar. However there is a significant difference of the structural makeup at high temperatures. The carbon atoms of the diamonds crystal structure share four valence electrons. However, at the surface only a maximum of two or three electrons can create a permanent bond. Leaving the one or two electrons from each atom to have a tendency to react with iron, cobalt, nickel or oxygen at high temperature. CBN has the same crystal structure but varies slightly, boron-nitrogen replaces the carbon-carbon bonds that are seen in diamond. This makes CBN less reactive at high temperatures. The biggest factor that makes CBN great for high temperatures is that it does not contain carbon, so it doesn’t react with a metal group the way that diamond does.
CBN Grinding Wheels are ideal for high-speed grinding. It allows for higher stock removal as well. High-speed grinding creates high temperatures at the grinding zone, causing the super abrasive material to heat. Unlike diamond, however, CBN has a higher thermal resistance. In fact, temperatures exceeding 800 degrees, CBN becomes harder than diamond and is more than able to keep its cutting edge well up to 1000 degrees. As well as a higher thermal resistance, the thermal conductivity of CBN is four and a half times better than copper making it a close competitor diamond. The strength and resistance to thermal and chemical attacks while maintaining sharp cutting edges during use makes CBN Grinding Wheels the superior choice compared to conventional grinding wheels. In addition it becomes the superabrasive choice for all varieties of steel alloys where diamond grinding wheels cannot be deployed. If you would like to read more about CBN Wheels click here.
Trust the experts
When you’re ready to try the best trust the experts at Eagle Superabrasives. Our experienced staff will provide support and advice along the way. With unparalleled customer service, superior products and fast shipping, Eagle Superabrasives is an easy choice for all your grinding needs. Contact us today to place an order!