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Low-Cost Bimetal Suspension Mounting Surface for a Mechanized R/W Suspension Attachment

IP.com Disclosure Number: IPCOM000042733D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Gill, GG: AUTHOR [+3]

Abstract

Present magnetic recording disk file machine arms carry four read/write (R/W) head suspension assemblies. The R/W suspension assemblies are attached to the arm individually using two miniature screws per suspension assembly, totaling 8 screws per arm assembly. These screws are then secured with epoxy to prevent loosening due to vibrations induced when in operation. Design prerequisites of a R/W suspension/arm assembly dictate a need for a high-strength low-weight arm component usually of aluminum or similar material. The suspension assembly to which the R/W head is attached is of a different material, usually stainless steel. These two subassemblies of dissimilar materials are joined together to comprise a "R/W suspension arm assembly.

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Low-Cost Bimetal Suspension Mounting Surface for a Mechanized R/W Suspension Attachment

Present magnetic recording disk file machine arms carry four read/write (R/W) head suspension assemblies. The R/W suspension assemblies are attached to the arm individually using two miniature screws per suspension assembly, totaling 8 screws per arm assembly. These screws are then secured with epoxy to prevent loosening due to vibrations induced when in operation. Design prerequisites of a R/W suspension/arm assembly dictate a need for a high- strength low-weight arm component usually of aluminum or similar material. The suspension assembly to which the R/W head is attached is of a different material, usually stainless steel. These two subassemblies of dissimilar materials are joined together to comprise a "R/W suspension arm assembly." This joining of dissimilar material has always been accomplished by swaging, staking or the use of screws. High production quantities for current and follow-on files dictate a need for mechanization which is difficult to accomplish with the design and assembly process in use today and in the past. Described here is an approach to create a bimetal suspension mounting surface on the aluminum arm component to which the stainless steel R/W suspension assembly is attached. Two holes per bridge are drilled at the locations now specified for the four miniature tapped threads. Prior to final accurate machining of the suspension mounting bridge surface...