| 摘要 |
PROBLEM TO BE SOLVED: To lower a production cost and accomplish oil supply from either end face by connecting a lubrication path reaching an orbital plane to a screw part side end face, connecting the lubrication path also to a hexagonal hole on a flange side end face, and forming an oil supply port to which an oil supply device can be installed. SOLUTION: In a stud 1, a lubricant supply hole 1g is formed over the overall length in the axial center, and oil holes 1h, 1i connected to an orbital plane 1b and a mounting part 1d are opened in the lubricant supply hole 1g, while an oil supply port 1n is formed on a screw part 1e side end face. A hexagonal hole 1j is formed in the shaft center on a flange 1a side end face, and a fastening tool is engaged with the hexagonal hole 1j for fastening and fixing the stud 1. An oil supply port 1m is formed in the hexagonal hole 1j so as to be communicated with the supply hole 1g and the oil hole 1h. To the oil supply ports 1m, 1n, either of a grease nipple 15 serving as an oil supply device and a tie plug 17 can be installed. In this way, the hexagonal hole and the stud can be formed at the same time in a forging process and a production cost can be lowered, while oil supply can be carried out from the end face on either side of the stud and handling can be facilitated. |
