Leaf Chains are produced for large load, slow speed stress linkage applications. Often they are specifi ed for reciprocating motion lifting devices this kind of as fork lifts or cranes. These chains are commonly provided to a specifi c length and are linked to a clevis block at every single end. The clevis may accommodate male ends (inside or in some cases referred to as “articulating” backlinks) or female ends (outdoors or the back links over the pin hyperlink) as demanded (see illustration below)
Leaf chains are available in three series; AL (light duty), BL (hefty duty), or LL (European standard). For new choices we advocate the BL series in preference to the AL series because the latter is discontinued as a recognized ASME/ANSI standard series chain. BL series chains are made in accordance together with the ASME/ANSI B29.8 American Leaf Chain Conventional. LL series chains are produced in accordance with the ISO 606 worldwide leaf chain standard.
A chain with an even quantity of pitches always features a 1 male and 1 female finish. It is actually much more frequent to possess the chain possess an odd variety of pitches in which situation the each ends is going to be either male (most common) or female (significantly less com-mon). When ordering lengths with an odd amount of pitches male ends are provided unless otherwise noted. Clevis pins, usually with cotters at each end, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are often (but not usually) linked to the clevis block with a cottered kind connecting link. The connecting link is the female finish component in this instance.
Leaf Chain Variety
Use the following formula to verify the choice of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Highest Chain Tension
DF: Duty Aspect
SF: Support Component
Note that the highest allowable chain velocity for leaf chains is 100ft per minute.