Leaf Chain – General Info and Choice

Leaf Chains are created for higher load, slow velocity tension linkage applications. Frequently they are really specifi ed for reciprocating movement lifting products this kind of as fork lifts or cranes. These chains are generally supplied to a specifi c length and therefore are linked to a clevis block at every single end. The clevis may accommodate male ends (inside or in some cases referred to as “articulating” links) or female ends (outside or the backlinks over the pin hyperlink) as required (see illustration beneath)
Leaf chains can be found in 3 series; AL (light duty), BL (heavy duty), or LL (European regular). For new choices we suggest the BL series in preference for the AL series because the latter continues to be discontinued being a recognized ASME/ANSI regular series chain. BL series chains are produced in accordance with the ASME/ANSI B29.eight American Leaf Chain Typical. LL series chains are generated in accordance with all the ISO 606 global leaf chain typical.
A chain with an even number of pitches always has a one male and a single female finish. It can be a lot more common to have the chain possess an odd quantity of pitches in which case the each ends will probably be both male (most common) or female (significantly less com-mon). When ordering lengths with an odd variety of pitches male ends are supplied unless of course otherwise mentioned. Clevis pins, generally with cotters at each and every end, are utilised to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not often) linked to the clevis block with a cottered sort connecting link. The connecting hyperlink will be the female end element in this case.
Leaf Chain Variety
Use the following formula to verify the choice of leaf chain:
Minimum Greatest Strength > T x DF x SF
T: Calculated Maximum Chain Stress
DF: Duty Issue
SF: Service Aspect
Note the greatest allowable chain velocity for leaf chains is 100ft per minute.