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Leaf Chains comprise different applications and are regulated by ANSI. They are used for low-speed pulling, for tension linkage and forklift masts, and as balancers between counterweight and head in certain machine tools. Leaf chains are sometimes likewise referred to as Balance Chains.
Features and Construction
Constructed of a simple link plate and pin construction, steel leaf chains is identified by a number which refers to the lacing of the links and the pitch. The chains have specific features like high tensile strength for every section area, which allows the design of smaller machines. There are A- and B- type chains in this series and both the BL6 and AL6 Series include the same pitch as RS60. Lastly, these chains cannot be powered utilizing sprockets.
Handling and Selection
In roller chains, the link plates maintain a higher fatigue resistance because of the compressive stress of press fits, yet the leaf chain only contains two outer press fit plates. On the leaf chain, the maximum allowable tension is low and the tensile strength is high. If handling leaf chains it is essential to confer with the manufacturer's instruction booklet so as to guarantee the safety factor is outlined and utilize safety guards always. It is a better idea to apply utmost caution and use extra safety guards in functions where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the utilization of a lot more plates. In view of the fact that the utilization of a lot more plates does not improve the most allowable tension directly, the number of plates can be limited. The chains require regular lubrication as the pins link directly on the plates, producing a very high bearing pressure. Using a SAE 30 or 40 machine oil is normally suggested for most applications. If the chain is cycled over 1000 times in a day or if the chain speed is over 30m for every minute, it would wear very fast, even with constant lubrication. Thus, in either of these situations using RS Roller Chains will be much more suitable.
AL type chains are only to be utilized under particular situations like for instance where there are no shock loads or if wear is not a huge problem. Make sure that the number of cycles does not go over 100 daily. The BL-type will be better suited under other situations.
If a chain using 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 somewhat easily. Performing frequent maintenance is really important if operating under these kinds of situations.
The inner link or outer link type of end link on the chain will determine the shape of the clevis. Clevis connectors or otherwise known as Clevis pins are constructed by manufacturers, but the user usually provides the clevis. An improperly constructed clevis could decrease the working life of the chain. The strands should be finished to length by the maker. Check the ANSI standard or phone the maker.
In the new millennium, Skyjack was acquired by the Linamar Corporation, who is LNR on the TSX, a primary producer of modules, assemblies and precision-machined components. Today, Skyjack has production facilities in the US, Canada and Hungary with added support offices in Asia and Europe.
Skyjack became the industry leader of aerial lift truck machinery by combining features like durability, quality and serviceability, making their own scissor platform lifts recognized worldwide for product efficiency and reliability. Skyjack proudly manufactures a full line of self-propelled scissor lifts. Their elevated work heights reach up to fifty six feet. The company`s existing Boom lift model series has telescopic booms ranging from forty five feet to seventy one feet. Skyjack has plans to further extend their boom hoist product line. The business is still a leading player in the trade adapting rapidly to the constantly evolving requirements of all their clients.
Lately, Skyjack purchased 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 added manufacturing capability further guarantees the company`s growth and success.
