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Reflex Clamp for Clamping Disks in Head Disk Assembly

IP.com Disclosure Number: IPCOM000047454D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Tamhane, SK [+details]

Abstract

Clamping magnetic disks in a head disk assembly (HDA) has historically been a problem inherently due to stringent functional requirements. Some of the more serious problems encountered so far are: 1. Thermal stresses due to different coefficients of thermal expansion of clamp material and disk material, causing high runout and surface normal acceleration X;. 2. Radial deflection of clamp under axial load imparts radial distortion to disks, causing disk runout and X;, high values of which adversely affect head flying characteristics and have been related to head crashes. 3. High variation of clamping loads due to stacking tolerance build-up. 4. High cost of intricate designs from expensive materials and involved manufacturing processes. 5.