Method of manufacturing narrow track ferrite head cores

Details Method of manufacturing narrow track ferrite head cores Method of manufacturing narrow track ferrite head cores

1978-07-24

1981-07-21

Smith, Gary L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

29603, 51281R, 360122, B24B 100, G11B 542

Patent

active

042791022

ABSTRACT:
A magnetic transducing core having a transducing face defined by planes whose surfaces comprise substantially parts of ferrite grains, and a method for producing this core. The method involves proper selection of the grit size and binder of a diamond grinding wheel, machining its sides to precise parallelism with each other, mounting it on a highly accurate air bearing, rotating it at high speed, and feeding a work piece ferrite bar from which the core is cut into the rotating wheel. These techniques prevent axial run-out between the edge of the cutting portion of the wheel and the work piece greater than 2.5 microns. A preferred embodiment includes a high pressure jet of coolant impinging on the wheel just ahead of the cutting interface.

REFERENCES:
patent: 2899781 (1959-08-01), Williams
patent: 3269381 (1966-08-01), Healy
patent: 3593414 (1971-07-01), Beun
patent: 4016855 (1977-04-01), Mimata
patent: 4017965 (1977-04-01), Brutsch

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