Narrow track ferrite head cores

Details Narrow track ferrite head cores Narrow track ferrite head cores

H - Electricity

01

F

352/29.9

H01F 41/02 (2006.01) B23P 15/00 (2006.01)

Patent

CA 1135845

ABSTRACT OF THE DISCLOSURE 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.

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