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Leaf Chains consist of several applications and are regulated by ANSI. They are meant for low-speed pulling, for tension linkage and lift truck masts, and as balancers between counterweight and head in some machine devices. Leaf chains are occasionally even called Balance Chains.
Features and Construction
Leaf chains are steel chains using a simple link plate and pin construction. The chain number refers to the pitch and the lacing of the links. The chains have particular features like for instance high tensile strength per section area, which allows the design of smaller machines. There are B- and A+ type chains in this particular series and both the AL6 and BL6 Series include the same pitch as RS60. Finally, these chains cannot be driven using 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 maximum permissible tension is low. If handling leaf chains it is essential to consult the manufacturer's guidebook so as to guarantee the safety factor is outlined and use safety guards always. It is a good idea to apply utmost caution and use extra safety guards in applications wherein the consequences of chain failure are severe.
Utilizing much more plates in the lacing leads to the higher tensile strength. In view of the fact that this does not improve the utmost permissible tension directly, the number of plates used could be restricted. The chains need regular lubrication for the reason that the pins link directly on the plates, generating a really high bearing pressure. Utilizing a SAE 30 or 40 machine oil is frequently suggested for most applications. If the chain is cycled more than 1000 times day by day or if the chain speed is over 30m per minute, it will wear really quick, even with constant lubrication. Hence, in either of these conditions using RS Roller Chains will be much more suitable.
AL type chains are only to be used under certain situations like for instance where there are no shock loads or if wear is not a big problem. Make certain that the number of cycles does not exceed 100 daily. The BL-type would be better suited under various conditions.
If a chain utilizing a lower safety factor is selected 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. Doing regular maintenance is 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 otherwise called Clevis pins are constructed by manufacturers but normally, the user provides the clevis. A wrongly made clevis can reduce the working life of the chain. The strands must be finished to length by the producer. Refer to the ANSI standard or get in touch with the producer.
In the new millennium, Skyjack was acquired by the Linamar Corporation, who is LNR on the TSX, a primary producer of assemblies, precision-machined components and modules. Now, Skyjack has production plants in Hungary, the US and Canada with extra support offices in Asia and Europe.
The Skyjack brand name became a leader in the industry for aerial hoist equipment by combining features like serviceability, durability and quality, making their own scissor lifts recognized all around the world for product reliability and efficiency. Skyjack manufactures lots of various self propelled aerial hoists for its international client base. Their elevated work heights reach up to 56 feet. The company`s present Boom lift 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 dominant player in the trade adjusting fast to the continuously changing requirements of all of their clients.
Of late, Skyjack bought Carelift Equipment in August of the year 2007 and Volvo's Material Handling Equipment in order to try to expand their Telehandling product offering. The resulting VR series telehandlers and Zoom Boom along with the added production ability further ensures the company`s success and growth.
