Hi there, all,
This isn't so much a 'How do I?' but more a 'How do they?'
It concerns ground thread dies primarily but I guess some of the answer will also apply to ground thread taps.
How do they profile the grinding wheel to suit the thread profile? Having profiled it, how long does it stay within the required tolerances?
Bearing in mind we could be talking about 12 B.A. or even finer and that a grinding wheel is, by definition, friable.