Leaf Chains are created for large load, slow speed stress linkage applications. Generally they are really specifi ed for reciprocating motion lifting units this kind of as fork lifts or cranes. These chains are generally supplied to a specifi c length and therefore are connected to a clevis block at every finish. The clevis could accommodate male ends (within or often named “articulating” links) or female ends (outdoors or even the backlinks on the pin website link) as necessary (see illustration under)
Leaf chains are available in three series; AL (light duty), BL (heavy duty), or LL (European regular). For new choices we endorse the BL series in preference towards the AL series as the latter continues to be discontinued like a acknowledged ASME/ANSI regular series chain. BL series chains are created in accordance together with the ASME/ANSI B29.8 American Leaf Chain Normal. LL series chains are made in accordance using the ISO 606 global leaf chain standard.
A chain with an even number of pitches always has a a single male and a single female finish. It really is additional prevalent to have the chain possess an odd number of pitches in which situation the each ends might be both male (most common) or female (significantly less com-mon). When ordering lengths with an odd amount of pitches male ends are supplied except if otherwise noted. Clevis pins, generally with cotters at every finish, are used to connect male chain ends to female clevis blocks. Chains with female ends are frequently (but not constantly) connected towards the clevis block by using a cottered type connecting hyperlink. The connecting link would be the female finish element in this instance.
Leaf Chain Selection
Use the following formula to verify the selection of leaf chain:
Minimum Ultimate Strength > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Issue
SF: Support Aspect
Note that the optimum allowable chain pace for leaf chains is 100ft per minute.