Leaf Chains are produced for high load, slow velocity stress linkage applications. Normally they are specifi ed for reciprocating movement lifting products this kind of as fork lifts or cranes. These chains are usually provided to a specifi c length and therefore are connected to a clevis block at just about every finish. The clevis may well accommodate male ends (inside or in some cases referred to as “articulating” hyperlinks) or female ends (outside or even the links on the pin website link) as required (see illustration beneath)
Leaf chains are available in three series; AL (light duty), BL (hefty duty), or LL (European typical). For new selections we advise the BL series in preference on the AL series as the latter is discontinued as a acknowledged ASME/ANSI standard series chain. BL series chains are created in accordance with the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are created in accordance with the ISO 606 worldwide leaf chain regular.
A chain with an even quantity of pitches constantly features a a single male and one female end. It really is far more prevalent to have the chain possess an odd amount of pitches by which situation the both ends will likely be both male (most typical) or female (significantly less com-mon). When ordering lengths with an odd quantity of pitches male ends are supplied unless otherwise noted. Clevis pins, generally with cotters at each finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are frequently (but not always) linked to the clevis block having a cottered kind connecting link. The connecting hyperlink will be the female finish element in this case.
Leaf Chain Selection
Make use of the following formula to verify the selection of leaf chain:
Minimum Greatest Strength > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Component
SF: Service Issue
Note that the optimum allowable chain velocity for leaf chains is 100ft per minute.