BUSH FOR ROLLER CHAIN AND ROLLER CHAIN USING THE SAME

摘要

PROBLEM TO BE SOLVED: To improve durability of a roller chain. SOLUTION: An oil porthole 12 is formed at a side wall 11 of a seamless cylinder of a bush 10. The bush 10 stores oil in the oil porthole 12, feeds oil between the bush 10 and a connecting pin, and between the bush 10 and a roller so as to form oil film for stably preventing wearing. COPYRIGHT: (C)2004,JPO