Leaf Chains are created for substantial load, slow velocity stress linkage applications. Frequently they’re specifi ed for reciprocating movement lifting units this kind of as fork lifts or cranes. These chains are usually provided to a specifi c length and therefore are linked to a clevis block at each and every finish. The clevis may perhaps accommodate male ends (inside or in some cases named “articulating” hyperlinks) or female ends (outside or the hyperlinks around the pin link) as needed (see illustration under)
Leaf chains are available in three series; AL (light duty), BL (heavy duty), or LL (European normal). For new selections we suggest the BL series in preference on the AL series because the latter has become discontinued like a acknowledged ASME/ANSI regular series chain. BL series chains are developed in accordance with all the ASME/ANSI B29.8 American Leaf Chain Common. LL series chains are generated in accordance using the ISO 606 worldwide leaf chain regular.
A chain with an even amount of pitches often includes a one male and 1 female end. It really is more typical to get the chain possess an odd quantity of pitches by which case the the two ends is going to be either male (most common) or female (significantly less com-mon). When ordering lengths with an odd number of pitches male ends are provided unless otherwise noted. Clevis pins, normally with cotters at just about every end, are utilized to connect male chain ends to female clevis blocks. Chains with female ends tend to be (but not usually) linked to the clevis block by using a cottered style connecting link. The connecting link is definitely the female finish part in this instance.
Leaf Chain Variety
Utilize the following formula to confirm the choice of leaf chain:
Minimal Ultimate Strength > T x DF x SF
T: Calculated Optimum Chain Stress
DF: Duty Issue
SF: Support Issue
Note that the optimum allowable chain speed for leaf chains is 100ft per minute.