Tight Tolerance Examples - Roll Grinding Service – Roll Grinding .PRG's roll tolerances are the tightest in the industry. Here are some examples of shapes we've achieved to tolerances of plus and minus 20 millionths of an inch.example of roll grinding,Roll grinders - PLCopenA roll grinder has little in common with a precision tool at first glance. . The automotive industry, for example, has specific requirements for the surface structure.
example of roll grinding