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Mast Chain
Mast Chains - Leaf Chains have different applications and are regulated by ANSI. They are intended for low-speed pulling, for tension linkage and lift truck masts, and as balancers between head and counterweight in some machine gadgets. Leaf chains are at times also called Balance Chains.
Features and Construction
Leaf chains are actually 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 certain features like high tensile strength for every section area, which allows the design of smaller devices. There are A- and B- type chains in this series and both the BL6 and AL6 Series have the same pitch as RS60. Lastly, these chains cannot be driven with sprockets.
Handling and Selection
In roller chains, the link plates maintain a higher fatigue resistance because of the compressive stress of press fits, yet the leaf chain just contains two outer press fit plates. On the leaf chain, the maximum permissible tension is low and the tensile strength is high. Whenever handling leaf chains it is important to check with the manufacturer's handbook in order to ensure the safety factor is outlined and use safety guards always. It is a great idea to exercise extreme caution and use extra safety measures in functions wherein the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the utilization of much more plates. Because the utilization of more plates does not improve the most permissible tension directly, the number of plates can be restricted. The chains need regular lubrication since the pins link directly on the plates, producing an extremely high bearing pressure. Making use of a SAE 30 or 40 machine oil is often 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 over 30m per minute, it would wear very quick, even with constant lubrication. Therefore, in either of these conditions using RS Roller Chains would be a lot more suitable.
AL type chains are only to be used under certain situations like for example where there are no shock loads or when wear is not really a huge issue. Make sure that the number of cycles does not exceed a hundred day after day. The BL-type will be better suited under various conditions.
If a chain utilizing a lower safety factor is chosen then the stress load in components will become higher. If chains are utilized with corrosive elements, then they can become fatigued and break quite easily. Performing frequent maintenance is really important when operating under these kinds of situations.
The type of end link of the chain, whether it is an outer link or inner link, determines the shape of the clevis. Clevis connectors or Clevis pins are constructed by manufacturers but often, the user supplies the clevis. An improperly constructed clevis could reduce the working life of the chain. The strands should be finished to length by the maker. Refer to the ANSI standard or get in touch with the maker.
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