Leaf Chains are manufactured for higher load, slow speed tension linkage applications. Often they’re specifi ed for reciprocating movement lifting devices such as fork lifts or cranes. These chains are normally provided to a specifi c length and therefore are connected to a clevis block at each and every finish. The clevis may well accommodate male ends (within or in some cases known as “articulating” backlinks) or female ends (outdoors or even the back links within the pin link) as demanded (see illustration under)
Leaf chains can be found in 3 series; AL (light duty), BL (heavy duty), or LL (European standard). For new choices we advocate the BL series in preference on the AL series since the latter is discontinued being a recognized ASME/ANSI normal series chain. BL series chains are made in accordance with the ASME/ANSI B29.8 American Leaf Chain Normal. LL series chains are developed in accordance with all the ISO 606 global leaf chain common.
A chain with an even number of pitches often has a one particular male and a single female finish. It is far more prevalent to get the chain possess an odd amount of pitches during which situation the both ends will probably be both male (most typical) or female (less com-mon). When ordering lengths with an odd amount of pitches male ends are supplied except if otherwise noted. Clevis pins, normally with cotters at each finish, are applied to connect male chain ends to female clevis blocks. Chains with female ends are frequently (but not always) linked to the clevis block that has a cottered type connecting link. The connecting link will be the female finish part in this case.
Leaf Chain Selection
Use the following formula to confirm the collection of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Greatest Chain Tension
DF: Duty Element
SF: Service Component
Note the greatest allowable chain velocity for leaf chains is 100ft per minute.