Leaf Chains are manufactured for substantial load, slow speed stress linkage applications. Often they’re specifi ed for reciprocating motion lifting gadgets such as fork lifts or cranes. These chains are commonly supplied to a specifi c length and are connected to a clevis block at each and every end. The clevis may accommodate male ends (inside or from time to time called “articulating” hyperlinks) or female ends (outside or the back links over the pin website link) as demanded (see illustration below)
Leaf chains can be found in 3 series; AL (light duty), BL (hefty duty), or LL (European regular). For new choices we advocate the BL series in preference to your AL series since the latter has become discontinued being a recognized ASME/ANSI common series chain. BL series chains are made in accordance with the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are created in accordance together with the ISO 606 global leaf chain standard.
A chain with an even quantity of pitches generally includes a one particular male and 1 female end. It really is a lot more popular to possess the chain possess an odd amount of pitches during which situation the both ends might be both male (most typical) or female (less com-mon). When ordering lengths with an odd number of pitches male ends are provided unless otherwise noted. Clevis pins, generally with cotters at every end, are applied to connect male chain ends to female clevis blocks. Chains with female ends are often (but not often) connected for the clevis block which has a cottered form connecting hyperlink. The connecting hyperlink is 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 Greatest Chain Tension
DF: Duty Issue
SF: Support Component
Note that the maximum allowable chain speed for leaf chains is 100ft per minute.