Been kinda crazy. Green silicon carbide bench grinding wheels are what is needed to grind carbide teeth. The grain itself is what does the work. Silicon carbide is extremely friable and sharp which means it breaks down very easily and stays sharp . When grinding touch metals, like titanium, stainless steel, hastalloy, waspalloy and carbides, silicon carbide will be your best choice for FINISHING.
For aggressive stock removal, most any grain, like aluminum oxide, zirconium, and ceramics can do the job, but only AO and Silicon carbide is available in a bench wheel.
Green Silicon carbide is the best wheel for your application. They can be bought relativley cheaply. Much cheaper than good quality diamond wheels (generally around $300-400 bucks each)
I would also go with a 120 grit wheel as this will give you a better surface finish and still grind at a fairly good speed. Always remember that slower speeds will generally remove more material than a higher speed.
Also keep the material as cool as possible by adding coolant or dipping them after a few seconds of grinding.
Another option that alot of people are using more and more is Silicon Carbide fiber discs. They go from 16 grit all the way up to 400 grit. They tend not to last very long, but the carbide can be sharpened anywhere, even while still on the machine!! Great for when you just have a few nicks and want to just " touch up" the teeth a little bit. These were normally used in the granite and marble industries, but the grain will cut carbide pretty well.
Hope this helps.
Leo
