| 摘要 |
The assembly described comprises a shaft mountable in the tailstock and upon the forward portion of which is rotatably supported a hub. One of a plurality of interchangeable frustoconically shaped work centering support members which differ from each other in external diameter and which are individually frictionally supportable on the hub to accommodate variously sized hollow workpieces is mounted on the hub. The assembly is lighter in weight and has better service characteristics than prior art devices.
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