Leaf Chain – Basic Information and Choice

Leaf Chains are produced for high load, slow velocity stress linkage applications. Normally they are really specifi ed for reciprocating motion lifting gadgets this kind of as fork lifts or cranes. These chains are commonly supplied to a specifi c length and therefore are linked to a clevis block at just about every finish. The clevis may perhaps accommodate male ends (within or occasionally named “articulating” hyperlinks) or female ends (outside or even the back links around the pin website link) as demanded (see illustration below)
Leaf chains are available in 3 series; AL (light duty), BL (hefty duty), or LL (European normal). For new selections we recommend the BL series in preference to the AL series because the latter has become discontinued as being a acknowledged ASME/ANSI normal series chain. BL series chains are developed in accordance with the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are generated in accordance with the ISO 606 global leaf chain regular.
A chain with an even number of pitches usually has a one male and 1 female finish. It is much more typical to possess the chain possess an odd amount of pitches through which case 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 supplied except if otherwise mentioned. Clevis pins, ordinarily with cotters at each finish, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are often (but not often) linked to your clevis block having a cottered style connecting link. The connecting website link may be the female finish element in this case.
Leaf Chain Selection
Utilize the following formula to verify the selection of leaf chain:
Minimal Ultimate Strength > T x DF x SF
T: Calculated Maximum Chain Tension
DF: Duty Component
SF: Support Aspect
Note that the highest allowable chain speed for leaf chains is 100ft per minute.