Post #342059 by sar1 on Sun, Nov 4, 2007 7:45 PM

On 2007-10-27 18:36, Benzart wrote:

HERE is the NZ distributor of the Hongia burs. They are very expensive but have what you want.

Thanks for the link, I have been investigating all types of burrs trying to get an idea of qualities available. I had no idea what CBN was until now, CBN is Cubic Boron Nitride and is the second hardest material known next to diamond.

I have read that brazed diamond points are higher quality than electroplated points but, the alignment of the diamonds on the points are also an important part of a quality burr or cutting blade. A soft bond is to be used for cutting hard materials, releasing old dull diamond crystals, exposing new diamond crystals to maintain cutting efficiency. A hard bond is used for cutting softer materials so that the points or cutting blades do not wear prematurely. There are some manufactures that incorporate one layer of diamond impregnation and other manufactures that use multi-layer diamond impregnation.

Burr price has nothing to do with quality as I have seen the same low quality burr sets at different retailers go for as low as $4.95USD for a 20pc set to $20USD for the same 20pc set. The quality is in knowing how the diamonds are set and bonded to the burrs, points, blades, or wheels based on the the hardness of material that you are planning on cutting or grinding. Following the suggested tooling speeds suggested by the manufacturer should aid in longer life of the tool.

There are some manufactures that will tell you that their diamond bonding process can not be guaranteed to be true, in other words the point, burr, or blades are not perfect which can cause skipping or shutter during the cutting process.

What makes the Hongia burrs the tool of choice?