Leaf Chains are made for large load, slow pace stress linkage applications. Usually they can be specifi ed for reciprocating motion lifting units 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 every single end. The clevis may accommodate male ends (inside or occasionally named “articulating” back links) or female ends (outside or the links about the pin hyperlink) as required (see illustration below)
Leaf chains can be found in three series; AL (light duty), BL (heavy duty), or LL (European normal). For new selections we endorse the BL series in preference to the AL series as the latter has become discontinued as a acknowledged ASME/ANSI typical series chain. BL series chains are generated in accordance using the ASME/ANSI B29.eight American Leaf Chain Common. LL series chains are generated in accordance with the ISO 606 international leaf chain conventional.
A chain with an even quantity of pitches generally features a one male and one particular female finish. It’s extra popular to have the chain possess an odd number of pitches through which case the each ends is going to be either male (most common) or female (much less com-mon). When ordering lengths with an odd number of pitches male ends are supplied unless otherwise noted. Clevis pins, commonly with cotters at every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not usually) linked towards the clevis block with a cottered kind connecting hyperlink. The connecting link would be the female finish component in this case.
Leaf Chain Choice
Make use of the following formula to confirm the variety of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Maximum Chain Stress
DF: Duty Issue
SF: Services Factor
Note that the maximum allowable chain speed for leaf chains is 100ft per minute.