Leaf Chains are produced for large load, slow velocity tension linkage applications. Typically they’re specifi ed for reciprocating motion lifting units this kind of as fork lifts or cranes. These chains are ordinarily provided to a specifi c length and are connected to a clevis block at every end. The clevis may well accommodate male ends (inside or often referred to as “articulating” back links) or female ends (outdoors or the backlinks on the pin website link) as expected (see illustration below)
Leaf chains are available in 3 series; AL (light duty), BL (heavy duty), or LL (European typical). For new choices we advise the BL series in preference towards the AL series since the latter has become discontinued like a acknowledged ASME/ANSI standard series chain. BL series chains are created in accordance with the ASME/ANSI B29.eight American Leaf Chain Typical. LL series chains are generated in accordance together with the ISO 606 global leaf chain regular.
A chain with an even quantity of pitches constantly has a 1 male and 1 female finish. It can be extra prevalent to have the chain possess an odd quantity of pitches by which case the each ends might be either male (most typical) or female (significantly less com-mon). When ordering lengths with an odd number of pitches male ends are provided unless of course otherwise mentioned. Clevis pins, typically with cotters at every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends tend to be (but not generally) connected to your clevis block having a cottered variety connecting link. The connecting hyperlink is definitely the female finish component in this instance.
Leaf Chain Selection
Utilize the following formula to verify the selection of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Greatest Chain Tension
DF: Duty Factor
SF: Service Issue
Note the maximum allowable chain speed for leaf chains is 100ft per minute.