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Leaf Chains comprise different applications and are regulated by ANSI. They are intended for tension linkage, forklift masts and for low-speed pulling, and as balancers between counterweight and head in some machine tools. Leaf chains are sometimes even called Balance Chains.
Construction and Features
Made of a simple pin construction and link plate, steel leaf chains is identified by a number which refers to the pitch and the lacing of the links. The chains have specific features like for instance high tensile strength per section area, that allows the design of smaller mechanisms. There are A- and B- type chains in this particular series and both the AL6 and BL6 Series have the same pitch as RS60. Finally, these chains cannot be powered using sprockets.
Handling and Selection
In roller chains, the link plates have a higher fatigue resistance because of the compressive stress of press fits, yet the leaf chain just has two outer press fit plates. On the leaf chain, the maximum allowable tension is low and the tensile strength is high. Whenever handling leaf chains it is essential to consult the manufacturer's catalogue in order to ensure the safety factor is outlined and use safety guards at all times. It is a better idea to exercise extreme caution and use extra safety guards in functions where the consequences of chain failure are severe.
Higher tensile strength is a direct correlation to the use of a lot more plates. For the reason that the utilization of much more plates does not improve the maximum acceptable tension directly, the number of plates can be restricted. The chains need regular lubrication for the reason that the pins link directly on the plates, producing a really high bearing pressure. Utilizing a SAE 30 or 40 machine oil is normally suggested for most applications. If the chain is cycled over 1000 times each day or if the chain speed is more than 30m for every minute, it would wear very fast, even with continual lubrication. Hence, in either of these conditions the use of RS Roller Chains would be a lot more suitable.
The AL-type of chains should only be utilized under certain conditions such as when wear is really not a big problem, when there are no shock loads, the number of cycles does not exceed one hundred day after day. The BL-type will be better suited under other situations.
The stress load in components will become higher if a chain with a lower safety factor is chosen. If the chain is likewise utilized amongst corrosive situations, it could easily fatigue and break extremely quick. Doing regular maintenance is important when operating under these types of situations.
The inner link or outer link kind of end link on the chain will determine the shape of the clevis. Clevis connectors or Clevis pins are made by manufacturers, but the user normally provides the clevis. A wrongly constructed clevis can lessen the working life of the chain. The strands must be finished to length by the maker. Check the ANSI standard or contact the manufacturer.
In the last ten years, Skyjack was purchased by the Linamar Corporation, a leading producer of modules, precision machined components and assemblies. Now, Skyjack has manufacturing facilities in Hungary, the United States and Canada with added support offices in Europe and Asia.
The Skyjack brand name became the industry leader for aerial lift truck equipment by combining features like serviceability, durability and quality, making their very own scissor lifts know all over the globe for product efficiency and reliability. Skyjack manufactures many other self-propelled aerial platform lifts for its worldwide customer base. Their elevated work heights reach nearly 56 feet. The company`s current Boom hoist model series has telescopic booms starting from 45 feet to 71 feet. Skyjack has plans to further extend their boom lift truck product line. The company is still a leading player in the industry adapting fast to the constantly evolving needs of their clients.
Skyjack`s acquisition of Carelift Equipment was done in August of 2007. Most recently, their purchase of Volvo`s Material Handling Equipment company expands Skyjack`s Telehandler product offering. The resulting Zoom Boom and VR series telehandlers together with the added production capacity further guarantees the company`s success and growth.
