我厂在车床大修中,利用大修后车床具备的精度,对严重拉伤的尾座孔进行自镗和研磨修正加工,取得了较为理想的效果.自镗所需的一套专用工具,适应于多种类型车床的尾座孔自镗加工.一般中小企业和有加工能力的厂矿,均可采用此法. I plant overhaul in the lathe, the use of overhaul lathe accuracy, the serious tail of the tail hole bore self-boring and grinding correction, and achieved a more satisfactory results. Since the boring required a set of special tools to adapt to Many types of lathe tail hole self-boring processing.General small and medium enterprises and processing capacity of factories and mines, can use this method.