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Leaf Chains comprise various functions and are regulated by ANSI. They are meant for tension linkage, lift truck masts and for low-speed pulling, and as balancers between counterweight and head in certain machine tools. Leaf chains are at times also called Balance Chains.
Features and Construction
Leaf chains are actually steel chains utilizing a simple pin construction and link plate. The chain number refers to the pitch and the lacing of the links. The chains have specific features like for instance high tensile strength per section area, which allows the design of smaller machines. There are B- and A+ kind chains in this series and both the BL6 and AL6 Series include the same pitch as RS60. Finally, these chains cannot be powered 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 maximum acceptable tension is low. When handling leaf chains it is essential to confer with the manufacturer's instruction booklet so as to ensure the safety factor is outlined and utilize safety guards at all times. It is a great idea to carry out extreme caution and use extra safety measures in applications wherein the consequences of chain failure are severe.
Using more plates in the lacing results in the higher tensile strength. Since this does not enhance the most allowable tension directly, the number of plates used can be limited. The chains need regular lubrication for the reason that the pins link directly on the plates, producing an extremely high bearing pressure. Utilizing a SAE 30 or 40 machine oil is frequently advised for nearly all applications. If the chain is cycled over 1000 times every day or if the chain speed is more than 30m for every minute, it will wear very rapidly, even with continuous lubrication. So, in either of these conditions utilizing RS Roller Chains will be more suitable.
The AL-type of chains should just be utilized under particular situations like for instance when wear is really not a big problem, if there are no shock loads, the number of cycles does not go beyond a hundred day by day. The BL-type would be better suited under various situations.
The stress load in parts will become higher if a chain utilizing a lower safety factor is chosen. If the chain is also used among corrosive situations, it can easily fatigue and break really fast. Performing regular maintenance is really essential if operating under these types of situations.
The inner link or outer link kind of end link on the chain would determine the shape of the clevis. Clevis connectors or likewise known as Clevis pins are made by manufacturers, but the user typically supplies the clevis. An improperly constructed clevis could lessen the working life of the chain. The strands must be finished to length by the producer. Refer to the ANSI standard or contact the maker.
In the new millennium, Skyjack was bought by the Linamar Corporation, who is LNR on the TSX, a primary manufacturer of assemblies, precision-machined components and modules. Now, Skyjack has manufacturing facilities in the US, Canada and Hungary with added support offices in Asia and Europe.
The Skyjack brand name became the industry leader for aerial hoist machines by combining features like for instance quality, durability and serviceability, making their own scissor hoists recognized all over the world for product reliability and efficiency. Skyjack manufactures lots of different self-propelled aerial lifts for its international customer base. Their elevated work heights reach up to 56 feet. The company`s existing Boom hoist model series has telescopic booms ranging from 45 feet to 71 feet. Skyjack has plans to further develop their boom lift product line. The company remains a leading player in the industry adapting fast to the continually changing needs of all of their clients.
Lately, Skyjack purchased Carelift Equipment in August of the year 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 additional manufacturing ability further ensures the company`s success and growth.
