Leaf Chain – Common Details and Selection

Leaf Chains are created for high load, slow pace stress linkage applications. Often these are specifi ed for reciprocating motion lifting products this kind of as fork lifts or cranes. These chains are usually provided to a specifi c length and are linked to a clevis block at every end. The clevis may possibly accommodate male ends (inside or often referred to as “articulating” hyperlinks) or female ends (outdoors or even the links about the pin hyperlink) as essential (see illustration under)
Leaf chains can be found in three series; AL (light duty), BL (heavy duty), or LL (European standard). For new selections we advocate the BL series in preference on the AL series because the latter has been discontinued as being a recognized ASME/ANSI regular series chain. BL series chains are made in accordance together with the ASME/ANSI B29.eight American Leaf Chain Standard. LL series chains are developed in accordance together with the ISO 606 global leaf chain regular.
A chain with an even quantity of pitches often has a a single male and one particular female finish. It truly is much more typical to possess the chain possess an odd number of pitches by which situation the each ends will be either male (most typical) or female (significantly less com-mon). When ordering lengths with an odd quantity of pitches male ends are provided except if otherwise noted. Clevis pins, commonly with cotters at every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are frequently (but not always) connected towards the clevis block by using a cottered kind connecting website link. The connecting hyperlink would be the female finish element in this instance.
Leaf Chain Selection
Make use of the following formula to confirm the collection of leaf chain:
Minimal Ultimate Strength > T x DF x SF
T: Calculated Greatest Chain Stress
DF: Duty Element
SF: Services Component
Note that the greatest allowable chain pace for leaf chains is 100ft per minute.