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Utilized in various applications, leaf chains are regulated by ANSI. They could be used for forklift masts, as balancers between counterweight and heads in some machine devices, and for tension linkage and low-speed pulling. Leaf chains are at times also known as Balance Chains.
Features and Construction
Leaf chains are steel chains with a simple link plate and pin construction. The chain number refers to the pitch and the lacing of the links. The chains have certain features like for example high tensile strength for each section area, which allows the design of smaller machines. There are A- and B- type chains in this particular series and both the AL6 and BL6 Series include the same pitch as RS60. Lastly, these chains cannot be powered utilizing sprockets.
Handling and Selection
Comparably, in roller chains, all of the link plates have higher fatigue resistance because of the compressive stress of press fits, while 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. While handling leaf chains it is vital to check with the manufacturer's catalogue in order to guarantee the safety factor is outlined and use safety guards all the time. It is a good idea to carry out utmost care and use extra safety guards in functions wherein the consequences of chain failure are serious.
Using much more plates in the lacing leads to the higher tensile strength. In view of the fact that this does not improve the utmost allowable tension directly, the number of plates utilized can be restricted. The chains need regular lubrication since the pins link directly on the plates, producing a really high bearing pressure. Using a SAE 30 or 40 machine oil is normally advised for the majority of applications. If the chain is cycled over one thousand times day by day or if the chain speed is over 30m per minute, it will wear really fast, even with constant lubrication. So, in either of these situations the use of RS Roller Chains would be a lot more suitable.
The AL-type of chains should only be utilized under certain situations like if wear is really not a huge issue, if there are no shock loads, the number of cycles does not go over one hundred day by day. The BL-type would be better suited under different conditions.
If a chain with a lower safety factor is selected then the stress load in parts will become higher. If chains are used with corrosive elements, then they can become fatigued and break somewhat easily. Doing regular maintenance is important when operating under these types of conditions.
The type of end link of the chain, whether it is an outer link or inner link, determines the shape of the clevis. Clevis connectors or likewise called Clevis pins are made by manufacturers but usually, the user supplies the clevis. An improperly constructed clevis could reduce the working life of the chain. The strands should be finished to length by the producer. Refer to the ANSI standard or contact the manufacturer.
In the last ten years, Skyjack was bought by the Linamar Corporation, a leading maker of precision machined components, assemblies and modules. Today, Skyjack has production plants in Hungary, the US and Canada with additional support offices in Asia and Europe.
The Skyjack trademark became a leader in the industry for aerial hoist equipment by combining features such as serviceability, durability and quality, making their very own scissor lifts recognized all over the world for product efficiency and reliability. Skyjack makes lots of other self propelled aerial hoists for its worldwide customer base. Their elevated work heights reach nearly 56 feet. The company`s existing Boom hoist model series has telescopic booms ranging from 45 feet to 71 feet. Skyjack has plans to further extend their boom lift truck product line. The company is still a dominant player in the industry adjusting rapidly to the continually evolving needs of all of their customers.
Recently, Skyjack acquired Carelift Equipment in August of the year 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 together with the extra manufacturing capability further ensures the company`s growth and success.
