Browse Prior Art Database

Double Chamfered Spacer Ring

IP.com Disclosure Number: IPCOM000116989D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Nakamoto, T: AUTHOR [+2]

Abstract

This article discloses a design for spacer rings used in Hard Disk Drives (HDD). Spacer rings functions as a spacer between disks. These spacer rings need to be smooth as possible on the disk contact surface. This is because any distortion of the disk affects the drive's disk to head spacing. The disclosed design incorporates edges which are chamfered twice instead of the normal one chamfer. By using this design, burrs are reduced significantly and therefore, disk distortion is minimized.

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Double Chamfered Spacer Ring

      This article discloses a design for spacer rings used in Hard
Disk Drives (HDD).  Spacer rings functions as a spacer between disks.
These spacer rings need to be smooth as possible on the disk contact
surface.  This is because any distortion of the disk affects the
drive's disk to head spacing.  The disclosed design incorporates
edges which are chamfered twice instead of the normal one chamfer.
By using this design, burrs are reduced significantly and therefore,
disk distortion is minimized.

      In the present design, edges are machined to a chamfer of 45
degrees (Fig. 1).  Burrs are often seen at the edge of the chamfer.
In the new design, two edges are created (Fig. 2).  In this way,
burrs can be minimized because the angle of machining is dull.  An
arbitrary angle less than 45 degrees can be selected according to the
application.