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Leaf Chains are created for higher load, slow velocity tension linkage applications. Often they are specifi ed for reciprocating motion lifting units this kind of as fork lifts or cranes. These chains are ordinarily supplied to a specifi c length and therefore are linked to a clevis block at each end. The clevis may accommodate male ends (within or at times identified as “articulating” backlinks) or female ends (outside or even the back links within the pin website link) as required (see illustration below)
Leaf chains are available in 3 series; AL (light duty), BL (heavy duty), or LL (European common). For new choices we suggest the BL series in preference towards the AL series because the latter has been discontinued as being a recognized ASME/ANSI common series chain. BL series chains are generated in accordance using the ASME/ANSI B29.eight American Leaf Chain Standard. LL series chains are produced in accordance using the ISO 606 international leaf chain normal.
A chain with an even number of pitches often features a 1 male and a single female finish. It’s a lot more frequent to possess the chain possess an odd number of pitches through which situation the each ends will probably be either male (most typical) or female (significantly less com-mon). When ordering lengths with an odd variety of pitches male ends are supplied unless otherwise noted. Clevis pins, usually with cotters at every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are often (but not constantly) connected to the clevis block having a cottered type connecting link. The connecting link would be the female end element in this instance.
Leaf Chain Choice
Use the following formula to verify the choice of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Maximum Chain Tension
DF: Duty Component
SF: Support Element
Note the greatest allowable chain pace for leaf chains is 100ft per minute.