BUSH AND METHOD FOR MANUFACTURING THEREOF

摘要

The present invention relates to a bush and a manufacturing method thereof and especially, to a device and a method for cutting oil grooves and smoothly flowing lubricating oil charged in the oil grooves. According to the present invention, the bush is cut by a cutting tool (20) which is rotated by a rotary shaft (210) arranged parallel to the longitudinal direction of the bush to form the oval or diamond shaped oil grooves (110) with widths over a circumferential width (Wr) and a longitudinal width (WI); thereby rapidly cutting the oil grooves. Thus, the present invention can increase the productivity of the bush and the lubricating efficiency of the oil grooves so that the functionality and marketability of the bush can be highly improved.