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Leaf Chains comprise various functions and are regulated by ANSI. They are used for low-speed pulling, for tension linkage and forklift masts, and as balancers between head and counterweight in some machine devices. Leaf chains are sometimes also called Balance Chains.
Features and Construction
Made of a simple pin construction and link plate, steel leaf chains is identified by a number that refers to the lacing of the links and the pitch. The chains have specific features like high tensile strength per section area, that allows the design of smaller mechanisms. There are B- and A+ kind chains in this series and both the BL6 and AL6 Series include the same pitch as RS60. Finally, these chains cannot be driven utilizing sprockets.
Selection and Handling
In roller chains, the link plates have a higher fatigue resistance due to the compressive tension of press fits, yet the leaf chain only has two outer press fit plates. On the leaf chain, the maximum permissible tension is low and the tensile strength is high. If handling leaf chains it is essential to consult the manufacturer's instruction manual in order to ensure the safety factor is outlined and use safety guards at all times. It is a great idea to exercise extreme care and use extra safety guards in functions wherein the consequences of chain failure are serious.
Utilizing a lot more plates in the lacing results in the higher tensile strength. Because this does not improve the most allowable tension directly, the number of plates used could be limited. The chains require frequent lubrication for the reason that the pins link directly on the plates, generating a very high bearing pressure. Using a SAE 30 or 40 machine oil is often advised for most applications. If the chain is cycled more than 1000 times daily or if the chain speed is more than 30m for every minute, it would wear extremely quick, even with continual lubrication. Therefore, in either of these conditions utilizing RS Roller Chains would be much more suitable.
The AL-type of chains should just be utilized under certain situations like for example if wear is not a huge concern, when there are no shock loads, the number of cycles does not exceed 100 daily. The BL-type will be better suited under various situations.
The stress load in parts will become higher if a chain utilizing a lower safety factor is selected. If the chain is even used amongst corrosive conditions, it could easily fatigue and break really fast. Performing frequent maintenance is really important if 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 also called Clevis pins are made by manufacturers but usually, the user supplies the clevis. A wrongly made clevis could decrease the working life of the chain. The strands should be finished to length by the manufacturer. Refer to the ANSI standard or call the maker.
In the new millennium, Skyjack was purchased by the Linamar Corporation, who is LNR on the TSX, a leading manufacturer of precision-machined components, modules and assemblies. Now, Skyjack has production plants in Hungary, the United States and Canada with added support offices in Asia and Europe.
The Skyjack brand name became a leader in the industry for aerial lift machines by combining features like for instance quality, durability and serviceability, making their own scissor hoists recognized all around the world for product reliability and efficiency. Skyjack makes lots of other self propelled aerial lifts for its worldwide client base. Their elevated work heights reach up to fifty six 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 business is still a leading player in the industry adjusting fast to the constantly changing needs of their clients.
Skyjack`s acquisition of Carelift Equipment was finished in August of the year 2007. Most recently, their acquisition of Volvo`s Material Handling Equipment company expands Skyjack`s Telehandler product offering. The resulting VR series telehandlers and Zoom Boom together with the extra production capability further guarantees the company`s growth and success.
