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Leaf Chains have several functions and are regulated by ANSI. They are meant for lift truck masts, for low-speed pulling and tension linkage, and as balancers between head and counterweight in certain machine devices. Leaf chains are occasionally also called Balance Chains.
Construction and Features
Constructed of a simple pin construction and link plate, steel leaf chains is identified by a number that refers to the lacing of the links and the pitch. The chains have particular features like for instance high tensile strength for each section area, which enables the design of smaller machines. There are B- and A+ kind chains in this particular series and both the BL6 and AL6 Series comprise the same pitch as RS60. Finally, these chains cannot be powered 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, 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. While handling leaf chains it is important to check with the manufacturer's manual in order to ensure the safety factor is outlined and utilize safety guards all the time. It is a great idea to carry out utmost care and use extra safety guards in applications wherein the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the utilization of more plates. Because the utilization of more plates does not enhance the maximum permissible tension directly, the number of plates can be restricted. The chains need frequent lubrication because the pins link directly on the plates, producing an extremely high bearing pressure. Using a SAE 30 or 40 machine oil is normally advised for most applications. If the chain is cycled over 1000 times day by day or if the chain speed is more than 30m for every minute, it will wear very fast, even with continuous lubrication. Hence, in either of these conditions utilizing RS Roller Chains would be a lot more suitable.
The AL-type of chains must just be used under certain conditions like for example if wear is not a big concern, when there are no shock loads, the number of cycles does not go over 100 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 parts will become higher. If chains are utilized with corrosive elements, then they may become fatigued and break quite easily. Doing regular maintenance is really essential if operating under these kinds of conditions.
The type of end link of the chain, whether it is an inner link or outer link, determines the shape of the clevis. Clevis connectors or likewise called Clevis pins are constructed by manufacturers but usually, the user supplies the clevis. A wrongly constructed clevis could decrease the working life of the chain. The strands must be finished to length by the manufacturer. Refer to the ANSI standard or get in touch with the producer.
In the past decade, Skyjack was purchased by the Linamar Corporation, a leading maker of assemblies, modules and precision machined components. Now, Skyjack has production facilities in Canada, Hungary and the United States with added support offices in Asia and Europe.
The Skyjack trade name became the industry leader for aerial lift machinery by combining features like for example quality, durability and serviceability, making their very own scissor platform lifts know around the world for product reliability and efficiency. Skyjack manufactures lots of other self propelled aerial hoists for its worldwide client base. Their elevated work heights reach about 56 feet. The company`s existing Boom lift truck 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 adapting rapidly to the always evolving requirements of all of their clients.
Skyjack`s purchase of Carelift Equipment was done in August of the year 2007. Most recently, their purchase of Volvo`s Material Handling Equipment business expands Skyjack`s Telehandler product offering. The resulting VR series telehandlers and Zoom Boom together with the extra production capacity further guarantees the company`s success and growth.