Leaf Chain – Basic Facts and Selection

Leaf Chains are made for large load, slow pace tension linkage applications. Generally these are specifi ed for reciprocating motion lifting units this kind of as fork lifts or cranes. These chains are typically supplied to a specifi c length and therefore are linked to a clevis block at every single end. The clevis may perhaps accommodate male ends (inside or at times termed “articulating” backlinks) or female ends (outdoors or even the backlinks around the pin website link) as demanded (see illustration under)
Leaf chains are available in three series; AL (light duty), BL (hefty duty), or LL (European conventional). For new selections we suggest the BL series in preference to the AL series because the latter is discontinued as a recognized ASME/ANSI regular series chain. BL series chains are created in accordance together with the ASME/ANSI B29.eight American Leaf Chain Regular. LL series chains are created in accordance together with the ISO 606 worldwide leaf chain normal.
A chain with an even variety of pitches often has a one male and one female end. It’s additional prevalent to get the chain possess an odd variety of pitches through which situation the both ends will probably be either male (most common) or female (much less com-mon). When ordering lengths with an odd amount of pitches male ends are provided unless of course otherwise noted. Clevis pins, usually with cotters at each and every end, are used to connect male chain ends to female clevis blocks. Chains with female ends tend to be (but not usually) linked towards the clevis block that has a cottered form connecting link. The connecting hyperlink would be the female end element in this case.
Leaf Chain Variety
Utilize the following formula to verify the variety of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Maximum Chain Stress
DF: Duty Aspect
SF: Services Element
Note that the highest allowable chain speed for leaf chains is 100ft per minute.