Is the internal and external grinder easy to learn?

1, internal and external grinder is easy to learn, surface grinder is simple, and internal grinder is dangerous.

2. Cylindrical grinder is a grinder used to process the outer surface and shoulder end face of cylindrical, conical or other shaped workpieces.

3. Internal grinder is mainly used to grind the surface and end face of cylindrical, conical or other inner holes.