A chain block is provided including a load chain which hangs a load, and a load sheave member which is rotatably supported between a first frame and a second frame, around which the load chain is wound, and which has a chain pocket in which the load chain goes, the load chain is made of a steel material having the Rockwell hardness C scale (HRC) of 47 to 51, and the load sheave member is made of a steel material in which at least the chain pocket has the Rockwell hardness C scale (HRC) of 40 to 45.
CHAIN BLOCK AND LOAD CHAIN
2015-11-05
Patent
Elektronische Ressource
Englisch
Aluminum alloy chain block with load limiting function
Europäisches Patentamt | 2021
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