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Leaf Chains comprise several applications and are regulated by ANSI. They are used for tension linkage, forklift masts and for low-speed pulling, and as balancers between counterweight and head in certain machine devices. Leaf chains are at times even called 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 pitch and the lacing of the links. The chains have certain features like for example high tensile strength per section area, which allows the design of smaller devices. There are A- and B- kind chains in this series and both the AL6 and BL6 Series contain 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 because of the compressive stress of press fits, whereas 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. When handling leaf chains it is vital to check with the manufacturer's manual in order to guarantee the safety factor is outlined and utilize safety guards all the time. It is a better idea to exercise utmost caution and use extra safety measures in applications where the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of much more plates. Because the use of more plates does not improve the most acceptable tension directly, the number of plates could be limited. The chains require frequent lubrication in view of the fact that the pins link directly on the plates, producing a really high bearing pressure. Making use of a SAE 30 or 40 machine oil is frequently suggested for most applications. If the chain is cycled over one thousand times daily or if the chain speed is more than 30m per minute, it would wear really rapidly, even with constant lubrication. Therefore, in either of these conditions the use of RS Roller Chains will be more suitable.
AL type chains are only to be used under certain conditions like for instance where there are no shock loads or if wear is not really a huge concern. Make positive that the number of cycles does not go beyond one hundred each day. The BL-type would be better suited under different situations.
If a chain with a lower safety factor is chosen then the stress load in components will become higher. If chains are used with corrosive elements, then they may become fatigued and break somewhat easily. Performing frequent maintenance is vital when operating under these kinds of situations.
The outer link or inner link kind of end link on the chain will determine the shape of the clevis. Clevis connectors or otherwise known as Clevis pins are made by manufacturers, but the user normally provides the clevis. A wrongly constructed clevis can decrease the working life of the chain. The strands must be finished to length by the manufacturer. Refer to the ANSI standard or contact the maker.
In the new millennium, Skyjack was acquired by the Linamar Corporation, who is LNR on the TSX, a primary producer of precision-machined components, modules and assemblies. Now, Skyjack has production facilities in Canada, Hungary and the US with additional support offices in Asia and Europe.
Skyjack became the leader in the industry of aerial hoist machinery by combining features like for instance serviceability, durability and quality, making their very own scissor platform lifts known worldwide for product reliability and efficiency. Skyjack proudly produces a full line of self propelled scissor lifts. Their elevated work heights reach up to 56 feet. The company`s current Boom hoist model series has telescopic booms starting from forty five feet to seventy one feet. Skyjack has plans to further develop their boom hoist product line. The business remains a leading player in the industry adjusting fast to the constantly evolving requirements of all their clients.
Skyjack`s acquisition of Carelift Equipment was done in August of 2007. Most recently, their acquisition of Volvo`s Material Handling Equipment business expands Skyjack`s Telehandler product offering. The resulting Zoom Boom and VR series telehandlers together with the extra production ability further ensures the company`s growth and success.
