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Leaf chains are actually steel chains with a simple pin construction and link plate. The chain number refers to the lacing of the links and the pitch. The chains have specific features like high tensile strength for each section area, which allows the design of smaller devices. There are B- and A+ type chains in this series and both the BL6 and AL6 Series comprise the same pitch as RS60. Finally, these chains cannot be powered using sprockets.
Comparably, in roller chains, all of the link plates have higher fatigue resistance due to 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 allowable tension is low. While handling leaf chains it is vital to confer with the manufacturer's instruction booklet so as to ensure the safety factor is outlined and utilize safety guards all the time. It is a better idea to apply utmost care and utilize extra safety guards in functions where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of more plates. Because the use of more plates does not improve the utmost permissible tension directly, the number of plates could be restricted. The chains require frequent lubrication since the pins link directly on the plates, producing a very high bearing pressure. Using a SAE 30 or 40 machine oil is normally advised for most applications. If the chain is cycled over 1000 times every day or if the chain speed is more than 30m for every minute, it will wear really fast, even with continual lubrication. Thus, in either of these conditions the use of RS Roller Chains will be a lot more suitable.
AL type chains are just to be used under certain situations like for example where there are no shock loads or when wear is not really a big problem. Make certain that the number of cycles does not go beyond 100 daily. The BL-type would be better suited under other situations.
If a chain utilizing a lower safety factor is chosen then the stress load in components will become higher. If chains are used with corrosive elements, then they can become fatigued and break quite easily. Doing frequent maintenance is really vital if operating under these kinds of conditions.