Provided are a load chain and a chain block that is capable of reducing load chain wear, even for small diameter chains, by adjusting the balance of the hardness corresponding to the load chain strength and the hardness of a load sheave. A chain block (10) comprising a load chain (C1) for suspending a load, and a load sheave member (20) that is rotatably supported between a first frame (11) and a second frame (12), and that has a chain pocket (23b) around which the load chain (C1) is wound and in which the load chain (C1) is inserted, wherein the load chain (C1) is formed from a steel with a Rockwell hardness C scale (HRC) of 47 to 51, and at least the chain pocket (23b) of the load sheave member (20) is formed from a steel with a Rockwell hardness C scale (HRC) of 40 to 45.
Chain block and load chain
2015-07-29
Patent
Electronic Resource
English