Leaf Chain – General Facts and Selection

Leaf Chains are produced for higher load, slow speed stress linkage applications. Normally they are really specifi ed for reciprocating movement lifting products this kind of as fork lifts or cranes. These chains are generally provided to a specifi c length and are linked to a clevis block at each and every finish. The clevis may perhaps accommodate male ends (within or from time to time known as “articulating” backlinks) or female ends (outside or the back links to the pin link) as expected (see illustration under)
Leaf chains are available in three series; AL (light duty), BL (hefty duty), or LL (European conventional). For new choices we advise the BL series in preference to your AL series because the latter continues to be discontinued being a acknowledged ASME/ANSI conventional series chain. BL series chains are developed in accordance with all the ASME/ANSI B29.8 American Leaf Chain Typical. LL series chains are generated in accordance together with the ISO 606 international leaf chain standard.
A chain with an even variety of pitches normally features a 1 male and one female end. It can be more frequent to have the chain possess an odd quantity of pitches through which situation the both ends will likely be both male (most common) or female (much less com-mon). When ordering lengths with an odd variety of pitches male ends are supplied unless otherwise noted. Clevis pins, generally with cotters at each end, are applied to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not always) linked to your clevis block that has a cottered type connecting link. The connecting link is the female finish part in this instance.
Leaf Chain Choice
Use the following formula to verify the collection of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Aspect
SF: Support Issue
Note that the optimum allowable chain velocity for leaf chains is 100ft per minute.