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Used in various applications, leaf chains are regulated by ANSI. They could be used for forklift masts, as balancers between heads and counterweight in several machine gadgets, and for low-speed pulling and tension linkage. Leaf chains are occasionally even referred to as Balance Chains.
Construction and Features
Leaf chains are steel chains utilizing a simple link plate and pin construction. The chain number refers to the lacing of the links and the pitch. The chains have certain features such as high tensile strength per section area, that enables the design of smaller devices. There are B- and A+ type chains in this particular series and both the AL6 and BL6 Series have the same pitch as RS60. Finally, these chains cannot be driven using 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. When handling leaf chains it is important to check with the manufacturer's handbook in order to guarantee the safety factor is outlined and use safety guards all the time. It is a better idea to apply utmost care and utilize extra safety measures in applications wherein the consequences of chain failure are serious.
Higher tensile strength is a direct correlation to the use of a lot more plates. In view of the fact that the utilization of much more plates does not enhance the utmost permissible tension directly, the number of plates may be restricted. The chains require regular lubrication as the pins link directly on the plates, producing a very high bearing pressure. Making use of a SAE 30 or 40 machine oil is often suggested for the majority of applications. If the chain is cycled over one thousand times day after day or if the chain speed is over 30m per minute, it would wear extremely rapidly, even with continual lubrication. Hence, in either of these situations using RS Roller Chains would be a lot more suitable.
The AL-type of chains should just be utilized under certain situations like for example if wear is not a huge issue, when there are no shock loads, the number of cycles does not go over a hundred day by day. The BL-type will be better suited under other conditions.
If a chain utilizing a lower safety factor is selected then the stress load in parts will become higher. If chains are used with corrosive elements, then they could become fatigued and break rather easily. Doing regular maintenance is essential if operating under these types of situations.
The outer link or inner link kind of end link on the chain would determine the shape of the clevis. Clevis connectors or likewise known as Clevis pins are constructed by manufacturers, but the user typically supplies the clevis. A wrongly constructed clevis could decrease the working life of the chain. The strands must be finished to length by the maker. Check the ANSI standard or get in touch with the manufacturer.
In the past ten years, Skyjack was acquired by the Linamar Corporation, a leading maker of modules, precision machined components and assemblies. Today, Skyjack has production plants in the US, Canada and Hungary with added support offices in Europe and Asia.
Skyjack became the industry leader of aerial lift machinery by combining features like durability, quality and serviceability, making their scissor platform lifts known worldwide for product reliability and efficiency. Skyjack proudly makes a full line of self-propelled scissor platform lifts. Their elevated work heights reach up to fifty six feet. The company`s present Boom hoist model series has telescopic booms starting from forty five feet to seventy one feet. Skyjack has plans to further expand their boom hoist product line. The business is still a dominant player in the industry adjusting rapidly to the constantly changing requirements of all of their clients.
Recently, Skyjack bought Carelift Equipment in August 2007 and Volvo's Material Handling Equipment in order to try to expand their Telehandling product offering. The resulting Zoom Boom and VR series telehandlers together with the added manufacturing capability further ensures the company`s growth and success.
