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Leaf Chains are produced for high load, slow velocity stress linkage applications. Generally these are specifi ed for reciprocating movement lifting units 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 well accommodate male ends (within or sometimes named “articulating” links) or female ends (outside or even the backlinks on the pin website link) as essential (see illustration under)
Leaf chains are available in 3 series; AL (light duty), BL (hefty duty), or LL (European common). For new choices we recommend the BL series in preference towards the AL series because the latter has been 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 Typical. LL series chains are developed in accordance together with the ISO 606 global leaf chain normal.
A chain with an even number of pitches usually features a 1 male and a single female finish. It is actually much more typical to possess the chain possess an odd amount of pitches during which case the each ends will be either male (most typical) or female (significantly less com-mon). When ordering lengths with an odd variety of pitches male ends are supplied unless otherwise noted. Clevis pins, usually with cotters at each finish, are applied to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not often) linked on the clevis block which has a cottered type 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: Services Factor
Note the greatest allowable chain speed for leaf chains is 100ft per minute.