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Used in various applications, leaf chains are regulated by ANSI. They can be used for lift truck masts, as balancers between counterweight and heads in several machine tools, and for low-speed pulling and tension linkage. Leaf chains are occasionally likewise known as Balance Chains.
Features and Construction
Leaf chains are steel chains with a simple pin construction and link plate. The chain number refers to the lacing of the links and the pitch. The chains have particular features such as high tensile strength per section area, that enables the design of smaller mechanisms. There are B- and A+ kind chains in this series and both the AL6 and BL6 Series comprise the same pitch as RS60. Lastly, these chains cannot be driven utilizing sprockets.
Selection and Handling
Comparably, in roller chains, all of the link plates have higher fatigue resistance due to the compressive stress of press fits, whereas in leaf chains, only two outer plates are press fit. The tensile strength of leaf chains is high and the maximum allowable tension is low. Whenever handling leaf chains it is vital to consult the manufacturer's catalogue to be able to ensure the safety factor is outlined and utilize safety guards all the time. It is a good idea to exercise extreme care and use extra safety measures in applications where the consequences of chain failure are severe.
Higher tensile strength is a direct correlation to the use of a lot more plates. Because the utilization of much more plates does not improve the most acceptable tension directly, the number of plates could be restricted. The chains need frequent lubrication in view of the fact that the pins link directly on the plates, generating a really high bearing pressure. Making use of a SAE 30 or 40 machine oil is frequently suggested for the majority of applications. If the chain is cycled more than one thousand times every day or if the chain speed is more than 30m for every minute, it will wear really rapidly, even with continual lubrication. Therefore, in either of these situations using RS Roller Chains would be much more suitable.
The AL-type of chains must only be utilized under certain conditions like for instance when wear is not a huge concern, if there are no shock loads, the number of cycles does not exceed a hundred each day. The BL-type will be better suited under various conditions.
If a chain utilizing a lower safety factor is selected then the stress load in components would become higher. If chains are used with corrosive elements, then they can become fatigued and break quite easily. Performing frequent maintenance is really important when operating under these types of conditions.
The type of end link of the chain, whether it is an inner link or outer link, determines the shape of the clevis. Clevis connectors or otherwise called Clevis pins are made by manufacturers but usually, the user provides the clevis. A wrongly made clevis could decrease the working life of the chain. The strands must be finished to length by the manufacturer. Check the ANSI standard or contact the producer.
In the last 10 years, Skyjack was bought by the Linamar Corporation, a leading producer of modules, precision machined components and assemblies. At present, Skyjack has production plants in Hungary, the US and Canada with extra support offices in Asia and Europe.
The Skyjack trademark became the industry leader for aerial lift equipment by combining features like for example quality, durability and serviceability, making their scissor lifts recognized all over the world for product efficiency and reliability. Skyjack makes a lot of different self-propelled aerial platform lifts for its worldwide client base. Their elevated work heights reach about 56 feet. The company`s existing Boom lift 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 company is still a dominant player in the trade adapting fast to the continuously evolving needs of their clients.
Skyjack`s purchase of Carelift Equipment was done in August of 2007. Most recently, their purchase of Volvo`s Material Handling Equipment business expands Skyjack`s Telehandler product offering. The resulting VR series telehandlers and Zoom Boom together with the added manufacturing capacity further guarantees the company`s growth and success.
