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Used in different applications, leaf chains are regulated by ANSI. They can be used for forklift masts, as balancers between heads and counterweight in some machine tools, and for low-speed pulling and tension linkage. Leaf chains are occasionally likewise known as Balance Chains.
Features and Construction
Made of a simple pin construction and link plate, 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 every section area, which allows the design of smaller machines. There are A- and B- kind chains in this series and both the AL6 and BL6 Series contain the same pitch as RS60. Lastly, these chains cannot be powered with sprockets.
Handling and Selection
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 acceptable tension is low. If handling leaf chains it is vital to check with the manufacturer's catalogue in order to guarantee the safety factor is outlined and utilize safety measures always. It is a better idea to apply utmost caution and use extra safety guards in applications where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of more plates. For the reason that the utilization of a lot more plates does not improve the maximum allowable tension directly, the number of plates could be limited. The chains need frequent lubrication since the pins link directly on the plates, generating an extremely high bearing pressure. Utilizing a SAE 30 or 40 machine oil is frequently suggested for nearly all applications. If the chain is cycled more than one thousand times every day or if the chain speed is more than 30m per minute, it will wear extremely rapidly, even with continuous lubrication. Therefore, in either of these situations using RS Roller Chains would be more suitable.
AL type chains are just to be utilized under certain conditions such as where there are no shock loads or when wear is not a huge issue. Be positive that the number of cycles does not go beyond 100 day after day. The BL-type would be better suited under various conditions.
If a chain with a lower safety factor is selected then the stress load in components would become higher. If chains are utilized with corrosive elements, then they can become fatigued and break somewhat easily. Doing frequent maintenance is really important when operating under these kinds of situations.
The outer link or inner link type of end link on the chain will determine the shape of the clevis. Clevis connectors or otherwise known as Clevis pins are constructed by manufacturers, but the user usually provides the clevis. An improperly made clevis can decrease the working life of the chain. The strands should be finished to length by the producer. Check the ANSI standard or call the producer.
In the last ten years, Skyjack was acquired by the Linamar Corporation, a leading producer of modules, precision machined components and assemblies. At present, Skyjack has production plants in Hungary, the United States and Canada with extra support offices in Europe and Asia.
Skyjack became the industry leader of aerial lift truck machinery by combining features like serviceability, durability and quality, making their own scissor platform lifts known all over the word for product efficiency and reliability. Skyjack proudly makes a full line of self-propelled scissor hoists. Their elevated work heights reach up to 56 feet. The company`s current Boom lift model series has telescopic booms ranging from 45 feet to 71 feet. Skyjack has plans to further extend their boom lift truck product line. The company remains a leading player in the industry adjusting fast to the continually changing needs of all of their customers.
Recently, Skyjack bought Carelift Equipment in August 2007 and Volvo's Material Handling Equipment in order to try to expand their Telehandling product offering. The resulting Zoom Boom and VR series telehandlers along with the added production capability further ensures the company`s success and growth.
