Make sure that the metal surface to which you will install the drive meets these specifications:

  • Flatness: ≤ 0.2 mm (0.0078 in)

  • Roughness: ≤ 25 S

    Note:

    A roughness of 25 S means that the average roughness “Ra” is 6.3 a and the maximum peak “Rz” is 25 μm.