Mast Chain

Forklift Mast Chain - Leaf Chains comprise several functions and are regulated by ANSI. They are used for low-speed pulling, for tension linkage and lift truck masts, and as balancers between head and counterweight in several machine devices. Leaf chains are sometimes likewise known as Balance Chains.

Construction and Features

Leaf chains are steel chains using a simple pin construction and link plate. The chain number refers to the lacing of the links and the pitch. The chains have particular features such as high tensile strength per section area, which allows the design of smaller machines. There are A- and B- kind chains in this series and both the AL6 and BL6 Series include the same pitch as RS60. Finally, these chains cannot be driven utilizing sprockets.

Selection and Handling

Comparably, in roller chains, all of the link plates maintain higher fatigue resistance due to the compressive stress of press fits, while in leaf chains, only two outer plates are press fit. The tensile strength of leaf chains is high and the most acceptable tension is low. When handling leaf chains it is vital to check with the manufacturer's handbook to be able to ensure the safety factor is outlined and use safety measures always. It is a better idea to apply extreme caution and utilize extra safety guards in applications where the consequences of chain failure are severe.

Utilizing much more plates in the lacing leads to the higher tensile strength. Since this does not improve the maximum permissible tension directly, the number of plates utilized may be limited. The chains need regular lubrication as the pins link directly on the plates, generating an extremely high bearing pressure. Utilizing a SAE 30 or 40 machine oil is often suggested for most applications. If the chain is cycled more than 1000 times daily or if the chain speed is over 30m for every minute, it will wear really quick, even with constant lubrication. Thus, in either of these situations the use of RS Roller Chains would be more suitable.

The AL-type of chains must just be used under particular situations like if wear is not a huge concern, if there are no shock loads, the number of cycles does not go over a hundred every day. The BL-type will be better suited under other situations.

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 may become fatigued and break rather easily. Doing regular maintenance is important if operating under these kinds of situations.

The inner link or outer link kind of end link on the chain would determine the shape of the clevis. Clevis connectors or also known as Clevis pins are constructed by manufacturers, but the user typically provides the clevis. An improperly constructed clevis could reduce the working life of the chain. The strands should be finished to length by the manufacturer. Check the ANSI standard or call the producer.

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