| 摘要 |
A rotor for an open end yarn spinner is disclosed having a depending boss with a bore therethrough for interference fit with a supporting shaft, wherein the boss is formed with an annular concave recess proximal its juncture with the base of the cup portion of the rotor and its lower cup wall. Flexural distortion at high rotational speeds of from 45,000 to 60,000 or more r.p.m. occurs primarily at the area of the recess and is minimized at the region of interference fit such that the grip on the supporting shaft is not substantially loosened and the rotor mounted thereon is not shifted or dislodged.
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