Leaf Chains are manufactured for high load, slow speed stress linkage applications. Frequently these are 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 are linked to a clevis block at every single end. The clevis may perhaps accommodate male ends (inside or occasionally called “articulating” hyperlinks) or female ends (outdoors or even the links on the pin link) as expected (see illustration beneath)
Leaf chains can be found in three series; AL (light duty), BL (hefty duty), or LL (European standard). For new selections we advocate the BL series in preference towards the AL series since the latter has become discontinued 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 Regular. LL series chains are developed in accordance using the ISO 606 global leaf chain conventional.
A chain with an even amount of pitches generally has a one particular male and 1 female end. It is actually additional common to get the chain possess an odd amount of pitches in which case the the two ends are going to be both male (most common) or female (significantly less com-mon). When ordering lengths with an odd quantity of pitches male ends are provided except if otherwise mentioned. Clevis pins, ordinarily with cotters at each and every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not normally) linked to the clevis block with a cottered sort connecting website link. The connecting hyperlink would be the female end element in this instance.
Leaf Chain Selection
Make use of the following formula to verify the collection of leaf chain:
Minimal Greatest Strength > T x DF x SF
T: Calculated Highest Chain Stress
DF: Duty Aspect
SF: Support Element
Note that the greatest allowable chain speed for leaf chains is 100ft per minute.