CBN for drill bits?

[Elden]

   Loading of the grinding wheel proved to be factor I had to contend with. As it became loaded, the grinding noise quieted down causing me to think it had reached the stop before it actually had. For larger bits plan to use the stone grader more than once during the bit sharpening unless you only are doing touch up grinding.

I believe keeping the grinding wheel in optimum cutting involves more of a learning/experience curve than most us, myself included, realize. Being aware of sound changes during grinding seems important. Yesterday I reran a five minute grinding test wuth the black stone. I could not understand why   it did not outperform better than the standard stone grinding metal lathe tool bits (high speed steel with alloys). I redid the test after freshly truing the wheel. For most of the first minute, the stone made a powerful grinding sound. I was pleased. However, it quickly quieted down and gave me the same disappointing results the initial test produced. I do not know if my test is a good indicator. There may be factors I am unaware of. I do know that there was a definite change in the grinding sound. I have always paid attention to sound while grinding. I will intensify my focus in the future. I believe there is much to be learned by close observation.

   I am curious if anyone has tried doing drill bits using a CBN wheel on the Tormek, utilizing the DBS-22? It would seem to possibly make a good combination.

[DaveCee5k]

Hi Elden.

Have you seen my post?

https://forum.tormek.com/index.php?topic=3262.0

[Elden]

Dave,
   Thanks for the reply. I have seen your previous post. Good work! However, I was hoping someone had tried one on the T7 or T8 wet or dry. I imagine Ken will get around to it sometime. I know he is busy.

[Ken S]

Yes, Elden, it is on my list 

Ken