(Perpendicularity) : Ensures two surfaces meet at a 90-degree angle.
Commercial grinders operate at high speeds, and any misalignment in the burrs leads to inconsistent grind size (fines). ISO 1101 Rule: Concentricity ( ⊙circled dot ) ensures the burrs are centered. ISO 1101 Rule: Total Run-out ( ↗↗↗ space ↗
What (like run-out or flatness) are you trying to solve?