internal grinding attachment in lathe by transmission method

FIG. 1 is a perspective view of the grinder attachment of the present invention mounted on a lathe for finish grinding a brake drum; FIG. 2 is an exploded, cross-sectional view of a grinder attachment embodying the present invention; FIG. 3 is a sectional view of the forward end portion of a quill taken along the line 3--3 of FIG. 2; and

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