Browse Prior Art Database

Bonding Bearings to Dissimilar Metals

IP.com Disclosure Number: IPCOM000102313D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 45K

Publishing Venue

IBM

Related People

Davison, J: AUTHOR [+3]

Abstract

This article describes a method of bonding casting metals to spindle bearings used in disk files, to avoid joint fractures caused by differential expansion stresses of bore and bearing. The process prevents vibration-induced misregistration errors in a disk file after thermal cycling by limiting the adhesive used to bond the spindle bearings into the base casting to one third of the bearing circumference. The disclosed method involves using an elastic adhesive and impregnated paper sleeves around two thirds of the bearing. (Image Omitted)

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Bonding Bearings to Dissimilar Metals

       This article describes a method of bonding casting metals
to spindle bearings used in disk files, to avoid joint fractures
caused by differential expansion stresses of bore and bearing.  The
process prevents vibration-induced misregistration errors in a disk
file after thermal cycling by limiting the adhesive used to bond the
spindle bearings into the base casting to one third of the bearing
circumference.  The disclosed method involves using an elastic
adhesive and impregnated paper sleeves around two thirds of the
bearing.

                            (Image Omitted)

      An aluminum casting mounting bore 1 is required to accept a
stainless steel bearing 2 to support a rotating spindle 3 of a disk
file.  Adhesive used to secure casting 1 to bearing 2 is supplied on
a paper sleeve which is impregnated with two different strengths of
adhesive separated into two sections of 120 degrees 5 and 240 degrees
6.  When the bearing 2 is fitted into casting bore 1 with the
adhesive sleeve 4 between them and a suitable setting chemical 7
applied to the bore, both adhesives are activated, providing a joint
the strength of which varies around the circumference.  The
120-degree segment 5 contains a high strength adhesive which securely
holds the stainless steel bearing 2; the 240-degree segment adhesive
is more elastic and prevents diametric stresses across the outer
bearing race.  These can contribut...