Leaf Chains are manufactured for substantial load, slow velocity tension linkage applications. Generally they can be specifi ed for reciprocating movement lifting gadgets this kind of as fork lifts or cranes. These chains are generally provided to a specifi c length and therefore are connected to a clevis block at just about every end. The clevis may perhaps accommodate male ends (inside or occasionally called “articulating” back links) or female ends (outside or the back links around the pin hyperlink) as required (see illustration below)
Leaf chains can be found in 3 series; AL (light duty), BL (heavy duty), or LL (European normal). For new choices we recommend the BL series in preference on the AL series since the latter is discontinued being a recognized ASME/ANSI standard series chain. BL series chains are produced in accordance together with the ASME/ANSI B29.8 American Leaf Chain Regular. LL series chains are developed in accordance with the ISO 606 worldwide leaf chain common.
A chain with an even variety of pitches generally includes a one male and a single female finish. It can be extra popular to possess the chain possess an odd variety of pitches in which case the the two ends might be both male (most common) or female (less com-mon). When ordering lengths with an odd quantity of pitches male ends are supplied unless of course otherwise noted. Clevis pins, ordinarily with cotters at each finish, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not usually) connected towards the clevis block having a cottered variety connecting website link. The connecting website link would be the female end component in this instance.
Leaf Chain Selection
Use the following formula to verify the collection of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Greatest Chain Tension
DF: Duty Component
SF: Support Aspect
Note the optimum allowable chain speed for leaf chains is 100ft per minute.