Leaf Chains are made for higher load, slow velocity tension linkage applications. Frequently they’re specifi ed for reciprocating movement lifting devices this kind of as fork lifts or cranes. These chains are commonly supplied to a specifi c length and are linked to a clevis block at each finish. The clevis may accommodate male ends (within or in some cases referred to as “articulating” back links) or female ends (outside or the hyperlinks on the pin hyperlink) as needed (see illustration beneath)
Leaf chains can be found in three series; AL (light duty), BL (hefty duty), or LL (European conventional). For new selections we advise the BL series in preference for the AL series because the latter has been discontinued being a acknowledged ASME/ANSI common series chain. BL series chains are created in accordance using the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are developed in accordance using the ISO 606 international leaf chain regular.
A chain with an even number of pitches usually includes a one male and one female finish. It is more frequent to have the chain possess an odd number of pitches in which situation the both 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 otherwise noted. Clevis pins, normally with cotters at every end, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not constantly) linked to your clevis block using a cottered style connecting hyperlink. The connecting website link will be the female end component in this case.
Leaf Chain Selection
Make use of the following formula to verify the variety of leaf chain:
Minimal Greatest Power > T x DF x SF
T: Calculated Greatest Chain Stress
DF: Duty Aspect
SF: Service Issue
Note the greatest allowable chain pace for leaf chains is 100ft per minute.