Leaf Chains are manufactured for higher load, slow velocity tension linkage applications. Frequently these are specifi ed for reciprocating movement lifting devices this kind of as fork lifts or cranes. These chains are typically provided to a specifi c length and are connected to a clevis block at just about every end. The clevis may possibly accommodate male ends (within or in some cases named “articulating” links) or female ends (outdoors or even the links over the pin link) as necessary (see illustration under)
Leaf chains can be found in 3 series; AL (light duty), BL (heavy duty), or LL (European common). For new selections we recommend the BL series in preference to the AL series since the latter has become discontinued as a recognized ASME/ANSI standard series chain. BL series chains are developed in accordance with all the ASME/ANSI B29.eight American Leaf Chain Common. LL series chains are developed in accordance using the ISO 606 worldwide leaf chain typical.
A chain with an even number of pitches constantly features a one particular male and a single female finish. It truly is more widespread to have the chain possess an odd number of pitches through which situation the the two ends might be both male (most typical) or female (less com-mon). When ordering lengths with an odd variety of pitches male ends are provided unless of course otherwise noted. Clevis pins, usually with cotters at each end, are made use of to connect male chain ends to female clevis blocks. Chains with female ends tend to be (but not normally) connected on the clevis block which has a cottered form connecting website link. The connecting hyperlink is definitely the female finish component in this case.
Leaf Chain Selection
Use the following formula to verify the choice of leaf chain:
Minimal Greatest Strength > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Component
SF: Services Factor
Note that the maximum allowable chain speed for leaf chains is 100ft per minute.