Patent ID: 11935559
Assignee: FURUKAWA ELECTRIC CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A hard disk drive, the hard disk drive being a 3.5-inch hard disk drive on which a magnetic disk formed of an aluminum alloy substrate is mounted, wherein
a thickness Td of each of magnetic disks that are arranged in a stacked manner is 0.3 mm or more and 0.6 mm or less, a number N of the magnetic disks is 10 or more and 16 or less, and an outer diameter 2Rso of a spacer that is arranged between the magnetic disks is 35 mm or more and 65 mm or less, and
the outer diameter 2Rso (mm) of the spacer satisfies 2Rso≥−60Td+70 and 2Rso≤−0.5N2+16.5N−73.