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Forklift Mast Chain
Mast Chains - Utilized in different applications, leaf chains are regulated by ANSI. They could be utilized for lift truck masts, as balancers between heads and counterweight in some machine tools, and for low-speed pulling and tension linkage. Leaf chains are sometimes also called Balance Chains.
Construction and Features
Made of a simple link plate and pin construction, steel leaf chains is identified by a number which refers to the pitch and the lacing of the links. The chains have certain features like high tensile strength for each section area, that allows the design of smaller mechanisms. There are B- and A+ kind chains in this particular series and both the AL6 and BL6 Series include the same pitch as RS60. Finally, these chains cannot be powered using sprockets.
Handling and Selection
Comparably, in roller chains, all of the link plates have higher fatigue resistance because of the compressive stress of press fits, whereas in leaf chains, just two outer plates are press fit. The tensile strength of leaf chains is high and the most permissible tension is low. While handling leaf chains it is essential to consult the manufacturer's handbook in order to ensure the safety factor is outlined and utilize safety guards all the time. It is a good idea to carry out extreme care and use extra safety measures in functions wherein the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the utilization of a lot more plates. In view of the fact that the utilization of more plates does not improve the maximum allowable tension directly, the number of plates could be restricted. The chains require regular lubrication as the pins link directly on the plates, producing a very high bearing pressure. Utilizing a SAE 30 or 40 machine oil is frequently suggested for nearly all applications. If the chain is cycled over one thousand times day by day or if the chain speed is over 30m for every minute, it will wear very fast, even with continuous lubrication. Thus, in either of these situations utilizing RS Roller Chains would be more suitable.
AL type chains are only to be used under particular situations like where there are no shock loads or when wear is not a big problem. Be sure that the number of cycles does not exceed one hundred daily. The BL-type would be better suited under different conditions.
If a chain with a lower safety factor is selected then the stress load in parts would become higher. If chains are utilized with corrosive elements, then they can become fatigued and break rather easily. Performing regular maintenance is important when operating under these types of conditions.
The inner link or outer link type of end link on the chain will determine the shape of the clevis. Clevis connectors or otherwise known as Clevis pins are made by manufacturers, but the user normally supplies the clevis. A wrongly constructed clevis could reduce the working life of the chain. The strands must be finished to length by the maker. Refer to the ANSI standard or call the producer.
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