| 摘要 |
The roller bit has a bearing neck (16) projecting from the supporting body (12), a cutting roller (18), and bearings (20, 22, 24, 26) for the rotatable mounting of the cutting roller on the bearing neck. A part of the bearings is designed as a hard, tough metal sleeve (22) which is provided with a metal coating having dry-lubricating properties. The metal coating lies between the metal sleeve (22) and the bearing neck (16) as well as between the metal sleeve and the cutting roller (18) in order to avoid seizing. <IMAGE> |
