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Leaf chains are steel chains with a simple pin construction and link plate. The chain number refers to the pitch and the lacing of the links. The chains have particular features like high tensile strength for each section area, that allows the design of smaller mechanisms. There are A- and B- kind chains in this series and both the BL6 and AL6 Series include the same pitch as RS60. Lastly, these chains cannot be powered with sprockets.
Comparably, in roller chains, all of the link plates maintain higher fatigue resistance because of the compressive stress of press fits, while in leaf chains, just two outer plates are press fit. The tensile strength of leaf chains is high and the utmost acceptable tension is low. If handling leaf chains it is essential to check with the manufacturer's handbook in order to guarantee the safety factor is outlined and use safety guards at all times. It is a great idea to exercise utmost care and use extra safety guards in applications where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the utilization of more plates. Because the utilization of a lot more plates does not improve the maximum acceptable tension directly, the number of plates could be restricted. The chains need frequent lubrication for the reason that the pins link directly on the plates, generating an extremely high bearing pressure. Making use of a SAE 30 or 40 machine oil is normally suggested for the majority of applications. If the chain is cycled more than one thousand times day by day or if the chain speed is more than 30m for every minute, it will wear very rapidly, even with continual lubrication. Hence, in either of these situations utilizing RS Roller Chains would be more suitable.
The AL-type of chains should just be used under certain conditions like for example if wear is really not a big issue, when there are no shock loads, the number of cycles does not go beyond a hundred day after day. The BL-type will be better suited under various situations.
If a chain with a lower safety factor is chosen then the stress load in components would become higher. If chains are used with corrosive elements, then they may become fatigued and break somewhat easily. Performing regular maintenance is really vital if operating under these types of conditions.