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Used in various functions, leaf chains are regulated by ANSI. They could be utilized for forklift masts, as balancers between heads and counterweight in several machine tools, and for tension linkage and low-speed pulling. Leaf chains are at times even known as Balance Chains.
Features and Construction
Leaf chains are steel chains with a simple link plate and pin construction. The chain number refers to the lacing of the links and the pitch. The chains have certain features such as high tensile strength for each section area, that enables the design of smaller mechanisms. There are A- and B- type chains in this series and both the AL6 and BL6 Series comprise the same pitch as RS60. Lastly, these chains cannot be driven using 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 most allowable tension is low. While handling leaf chains it is vital to consult the manufacturer's instruction manual in order to ensure the safety factor is outlined and utilize safety measures always. It is a great idea to exercise utmost caution and use extra safety guards in applications where the consequences of chain failure are severe.
Higher tensile strength is a direct correlation to the utilization of more plates. Since the use of much more plates does not enhance the most acceptable tension directly, the number of plates could be restricted. The chains need frequent lubrication because the pins link directly on the plates, generating a very high bearing pressure. Using a SAE 30 or 40 machine oil is often suggested for most applications. If the chain is cycled more than 1000 times in a day or if the chain speed is more than 30m for each minute, it will wear very rapidly, even with continuous lubrication. Hence, in either of these conditions the use of RS Roller Chains will be much more suitable.
AL type chains are just to be utilized under particular situations like where there are no shock loads or if wear is not a huge issue. Be positive that the number of cycles does not exceed a hundred on a daily basis. The BL-type will be better suited under other conditions.
If a chain using a lower safety factor is selected then the stress load in parts would become higher. If chains are used with corrosive elements, then they may become fatigued and break quite easily. Performing regular maintenance is really essential when operating under these kinds of conditions.
The kind of end link of the chain, whether it is an inner link or outer link, determines the shape of the clevis. Clevis connectors or Clevis pins are constructed by manufacturers but usually, the user provides the clevis. A wrongly constructed clevis can lessen the working life of the chain. The strands should be finished to length by the producer. Refer to the ANSI standard or get in touch with the maker.
In the last decade, Skyjack was acquired by the Linamar Corporation, a leading producer of precision machined components, assemblies and modules. Now, Skyjack has manufacturing facilities in Hungary, the US and Canada with extra support offices in Asia and Europe.
The Skyjack brand name became the industry leader for aerial lift equipment by combining features such as durability, quality and serviceability, making their scissor hoists know around the globe for product reliability and efficiency. Skyjack makes lots of various self propelled aerial lifts for its worldwide client base. Their elevated work heights reach nearly fifty six feet. The company`s existing Boom hoist model series has telescopic booms starting from 45 feet to 71 feet. Skyjack has plans to further extend their boom lift product line. The business remains a leading player in the industry adjusting fast to the continually evolving requirements of all their customers.
Of late, Skyjack acquired Carelift Equipment in August 2007 and Volvo's Material Handling Equipment to be able to try to expand their Telehandling product offering. The resulting VR series telehandlers and Zoom Boom along with the extra production capability further ensures the company`s success and growth.
