| 摘要 |
A cylindrical roller rotatably supported on a stationary shaft and used as an idler in a conveyer belt arrangement, the roller including an end bearing supported relatively thick cylinder of a ceramic material with a very hard and smooth outer surface for contacting the conveyer belt, the roller being in the form of either a single elongated ceramic cylinder supported at its ends by end bearings, or a single elongated ceramic cylinder mounted on an end bearing supported steel sleeve, or a plurality of spaced relatively shorter elongated ceramic segments mounted on an end bearing supported steel sleeve or tube.
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