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Constructed of a simple pin construction and link plate, steel leaf chains is identified by a number which refers to the lacing of the links and the pitch. The chains have certain features like for instance high tensile strength per section area, that enables the design of smaller machines. There are B- and A+ kind chains in this series and both the AL6 and BL6 Series contain the same pitch as RS60. Lastly, 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, whereas 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. If handling leaf chains it is important to consult the manufacturer's guidebook in order to guarantee the safety factor is outlined and utilize safety guards always. It is a better idea to exercise utmost caution and use extra safety guards in functions wherein the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of much more plates. For the reason that the use of much more plates does not enhance the most allowable tension directly, the number of plates may be limited. The chains require 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 advised for most applications. If the chain is cycled more than 1000 times every day or if the chain speed is over 30m for every minute, it will wear extremely rapidly, even with continual lubrication. So, in either of these situations utilizing RS Roller Chains would be more suitable.
The AL-type of chains must just be used under particular conditions such as when wear is not a huge problem, if there are no shock loads, the number of cycles does not go over one hundred a day. The BL-type will be better suited under other conditions.
The stress load in parts will become higher if a chain using a lower safety factor is selected. If the chain is also used among corrosive conditions, it could easily fatigue and break very quick. Doing frequent maintenance is important when operating under these kinds of situations.