Leaf Chains are manufactured for large load, slow velocity stress linkage applications. Generally they may be specifi ed for reciprocating movement lifting units such as fork lifts or cranes. These chains are generally provided to a specifi c length and therefore are linked to a clevis block at every single finish. The clevis may accommodate male ends (within or occasionally called “articulating” back links) or female ends (outdoors or even the back links about the pin website link) as required (see illustration under)
Leaf chains can be found in 3 series; AL (light duty), BL (hefty duty), or LL (European standard). For new selections we advise the BL series in preference to your AL series because the latter has become discontinued as being a acknowledged ASME/ANSI conventional series chain. BL series chains are developed in accordance with all the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are generated in accordance using the ISO 606 international leaf chain regular.
A chain with an even quantity of pitches usually features a one particular male and one particular female end. It’s a lot more popular to possess the chain possess an odd number of pitches by which case the both ends is going to be both male (most common) or female (less com-mon). When ordering lengths with an odd number of pitches male ends are supplied except if otherwise noted. Clevis pins, commonly with cotters at every single finish, are employed to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not constantly) linked to your clevis block with a cottered style connecting hyperlink. The connecting website link would be the female end component in this instance.
Leaf Chain Choice
Use the following formula to confirm the selection of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Greatest Chain Stress
DF: Duty Factor
SF: Services Issue
Note that the highest allowable chain speed for leaf chains is 100ft per minute.