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Made of a simple link plate and pin construction, steel leaf chains is identified by a number that refers to the pitch and the lacing of the links. The chains have specific features like for instance high tensile strength for each section area, which allows the design of smaller mechanisms. There are B- and A+ kind chains in this series and both the AL6 and BL6 Series comprise the same pitch as RS60. Finally, these chains cannot be driven with sprockets.
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, just two outer plates are press fit. The tensile strength of leaf chains is high and the utmost permissible tension is low. If handling leaf chains it is important to check with the manufacturer's catalogue so as to guarantee the safety factor is outlined and use safety measures at all times. It is a good idea to exercise extreme caution and use extra safety measures in applications where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of a lot more plates. As the use of much more plates does not enhance the most permissible tension directly, the number of plates may be limited. The chains need frequent 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 the majority of applications. If the chain is cycled more than one thousand times each day or if the chain speed is more than 30m per minute, it will wear extremely rapidly, even with continuous lubrication. Hence, in either of these conditions the use of RS Roller Chains will be more suitable.
The AL-type of chains should just be utilized under particular conditions like for instance if wear is really not a big issue, when there are no shock loads, the number of cycles does not go over 100 day after day. The BL-type would be better suited under different conditions.
If a chain using 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 somewhat easily. Performing regular maintenance is essential when operating under these kinds of situations.
