北京800—1型钻机摩擦离合器的滑套和半滑环经常作相对回转运动,接触面互相摩擦,铜质半滑环很易摩损,更换频繁,消耗量大.有的钻机平均一个半月就得更换一付.为此我们用122轴承代替半滑环进行了改装.经一年多的实践,证明工作可靠.我队三一○机用轴承取代半滑环后,钻进两个钻孔,进 The sliding sleeve and semi-sliding ring of the Beijing 800-1 rig friction clutch often make relative rotation movements, the contact surfaces rub against each other, the copper semi-slip ring is easy to wear, and replacement is frequent and consumes large amounts. Some rigs average one and a half months. To replace it, we replaced it with a 122-slide instead of a semi-slip ring. After more than a year of practice, it proved to be reliable. After replacing the semi-slip ring with the bearing of the 3100 machine, we drilled two holes. , into