Leaf Chains are produced for higher 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 finish. 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 under)
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 as 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 together with the ISO 606 international leaf chain conventional.
A chain with an even quantity of pitches always has a 1 male and 1 female finish. It is actually much more typical to possess the chain possess an odd variety of pitches through which situation the each ends will likely be either male (most common) or female (much 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 always) connected to your clevis block which has a cottered kind connecting link. The connecting link is definitely the female end component in this instance.
Leaf Chain Variety
Use the following formula to confirm the choice of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Factor
SF: Support Component
Note that the highest allowable chain velocity for leaf chains is 100ft per minute.