Leaf Chains are created for substantial load, slow speed tension linkage applications. Generally they are really specifi ed for reciprocating movement lifting gadgets this kind of as fork lifts or cranes. These chains are normally supplied to a specifi c length and therefore are linked to a clevis block at just about every finish. The clevis may well accommodate male ends (inside or from time to time termed “articulating” back links) or female ends (outside or the backlinks over the pin hyperlink) as needed (see illustration below)
Leaf chains are available in 3 series; AL (light duty), BL (heavy duty), or LL (European normal). For new selections we advise the BL series in preference to your AL series since the latter continues to be discontinued as being a acknowledged ASME/ANSI normal series chain. BL series chains are made in accordance with all the ASME/ANSI B29.8 American Leaf Chain Standard. LL series chains are created in accordance with the ISO 606 international leaf chain regular.
A chain with an even variety of pitches normally has a a single male and one particular female finish. It is much more typical to have the chain possess an odd variety of pitches through which situation the each ends will be either male (most typical) or female (less com-mon). When ordering lengths with an odd number of pitches male ends are supplied unless of course otherwise noted. Clevis pins, generally with cotters at every single finish, are utilized to connect male chain ends to female clevis blocks. Chains with female ends tend to be (but not generally) connected on the clevis block having a cottered form connecting link. The connecting hyperlink is the female end component in this case.
Leaf Chain Selection
Make use of the following formula to verify the choice of leaf chain:
Minimal Greatest Power > T x DF x SF
T: Calculated Maximum Chain Tension
DF: Duty Element
SF: Services Issue
Note that the maximum allowable chain pace for leaf chains is 100ft per minute.