Leaf Chains are manufactured for higher load, slow velocity stress linkage applications. Often they may be specifi ed for reciprocating movement lifting devices this kind of as fork lifts or cranes. These chains are generally supplied to a specifi c length and are connected to a clevis block at just about every finish. The clevis may perhaps accommodate male ends (within or from time to time known as “articulating” back links) or female ends (outdoors or even the links around the pin hyperlink) as required (see illustration beneath)
Leaf chains are available in three series; AL (light duty), BL (heavy duty), or LL (European typical). For new selections we advocate the BL series in preference towards the AL series because the latter has become discontinued being a recognized ASME/ANSI normal series chain. BL series chains are produced in accordance using the ASME/ANSI B29.eight American Leaf Chain Typical. LL series chains are made in accordance with the ISO 606 international leaf chain regular.
A chain with an even quantity of pitches often includes a one particular male and one female finish. It is actually extra typical to have the chain possess an odd quantity of pitches in which situation the the two ends might be either male (most common) or female (less com-mon). When ordering lengths with an odd variety of pitches male ends are supplied unless otherwise noted. Clevis pins, typically with cotters at each end, are applied to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not often) linked on the clevis block having a cottered form connecting link. The connecting website link is the female finish component in this case.
Leaf Chain Selection
Make use of the following formula to verify the collection of leaf chain:
Minimum Greatest Power > T x DF x SF
T: Calculated Highest Chain Stress
DF: Duty Factor
SF: Services Element
Note the greatest allowable chain speed for leaf chains is 100ft per minute.