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Leaf Chains have different functions and are regulated by ANSI. They are intended for tension linkage, forklift masts and for low-speed pulling, and as balancers between counterweight and head in certain machine tools. Leaf chains are sometimes also called Balance Chains.
Features and Construction
Leaf chains are 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 particular features like for example high tensile strength for every section area, that enables the design of smaller mechanisms. There are B- and A+ type chains in this series and both the AL6 and BL6 Series have the same pitch as RS60. Finally, these chains cannot be driven with sprockets.
Selection and Handling
Comparably, in roller chains, all of the link plates maintain 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 maximum acceptable tension is low. Whenever handling leaf chains it is important to confer with the manufacturer's instruction booklet in order to guarantee the safety factor is outlined and utilize safety guards all the time. It is a great idea to carry out utmost caution and utilize extra safety measures in functions wherein the consequences of chain failure are severe.
Higher tensile strength is a direct correlation to the utilization of a lot more plates. In view of the fact that the utilization of much more plates does not improve the utmost acceptable tension directly, the number of plates may be restricted. The chains need regular lubrication because the pins link directly on the plates, producing a really high bearing pressure. Using a SAE 30 or 40 machine oil is frequently advised for most applications. If the chain is cycled over one thousand times in a day or if the chain speed is over 30m for each minute, it will wear extremely rapidly, even with continual lubrication. Thus, in either of these situations utilizing RS Roller Chains will be a lot more suitable.
The AL-type of chains should just be used under particular situations like for example if wear is not a huge problem, when there are no shock loads, the number of cycles does not exceed a hundred daily. The BL-type will be better suited under various situations.
If a chain utilizing a lower safety factor is selected 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. Doing regular maintenance is really important when operating under these types of situations.
The inner link or outer link kind of end link on the chain will determine the shape of the clevis. Clevis connectors or Clevis pins are made by manufacturers, but the user normally supplies the clevis. An improperly made clevis can lessen the working life of the chain. The strands should be finished to length by the manufacturer. Refer to the ANSI standard or get in touch with the manufacturer.
In the new millennium, Skyjack was bought by the Linamar Corporation, who is LNR on the TSX, a primary producer of precision-machined components, modules and assemblies. Now, Skyjack has manufacturing plants in Hungary, the US and Canada with extra support offices in Europe and Asia.
Skyjack became the leader in the industry of aerial lift machinery by combining features like for instance quality, serviceability and durability, making their very own scissor lifts known all around the globe for product efficiency and reliability. Skyjack proudly manufactures a full line of self-propelled scissor hoists. Their elevated work heights reach about 56 feet. The company`s present Boom hoist 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 business remains a dominant player in the industry adjusting rapidly to the continuously evolving requirements of all their clients.
Recently, Skyjack bought Carelift Equipment in August 2007 and Volvo's Material Handling Equipment to try to expand their Telehandling product offering. The resulting VR series telehandlers and Zoom Boom along with the added production capacity further ensures the company`s success and growth.
