Leaf Chains are manufactured for large load, slow speed stress linkage applications. Often they are specifi ed for reciprocating motion lifting gadgets this kind of as fork lifts or cranes. These chains are generally supplied to a specifi c length and are connected to a clevis block at every single end. The clevis may perhaps accommodate male ends (inside or in some cases termed “articulating” hyperlinks) or female ends (outside or the back links to the pin website link) as expected (see illustration under)
Leaf chains can be found in three series; AL (light duty), BL (hefty duty), or LL (European regular). For new choices we advise the BL series in preference on the AL series since the latter has become discontinued like a recognized ASME/ANSI typical series chain. BL series chains are created in accordance with the ASME/ANSI B29.eight American Leaf Chain Typical. LL series chains are produced in accordance together with the ISO 606 global leaf chain standard.
A chain with an even number of pitches normally includes a a single male and 1 female finish. It’s far more popular to possess the chain possess an odd amount of pitches during which situation the both ends are going to be both male (most typical) or female (less com-mon). When ordering lengths with an odd number of pitches male ends are supplied except if otherwise noted. Clevis pins, typically with cotters at every finish, are applied to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not often) connected for the clevis block that has a cottered form connecting link. The connecting hyperlink is definitely the female end element in this instance.
Leaf Chain Choice
Utilize the following formula to verify the selection of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Greatest Chain Stress
DF: Duty Element
SF: Support Issue
Note that the maximum allowable chain speed for leaf chains is 100ft per minute.