| 摘要 |
A rotary cutter head for a lawn trimmer or the like has a die cast head body comprising a top circular wall and a depending hub, with a plate riveted to the bottom of the hub for forming a spool to receive a winding of flexible cutting line such as monofilament nylon. A peripheral depending skirt on the circular wall is segmented by spaced downward open notches defined at their axial sides and their tops by convex faces, so as to form line apertures. A molded bottom glide cup has its cylindrical side wall inside and spaced from the segmented skirt by a distance less than the line thickness, with its top edge close below the tops of the notches. The body is mounted on a drive arbor by a nut seated in and removable by manual rotation of the glide cup relative to the body.
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