Leaf Chains are manufactured for substantial load, slow speed stress linkage applications. Normally they are specifi ed for reciprocating motion lifting products this kind of as fork lifts or cranes. These chains are typically provided to a specifi c length and are linked to a clevis block at every finish. The clevis could accommodate male ends (inside or sometimes termed “articulating” hyperlinks) or female ends (outside or even the links within the pin link) as required (see illustration under)
Leaf chains can be found 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 since the latter has been discontinued as being a recognized ASME/ANSI conventional series chain. BL series chains are generated in accordance with the ASME/ANSI B29.8 American Leaf Chain Common. LL series chains are created in accordance with all the ISO 606 worldwide leaf chain common.
A chain with an even amount of pitches always has a a single male and a single female finish. It’s additional frequent to get the chain possess an odd quantity of pitches by which situation the the two ends might be either male (most common) or female (less com-mon). When ordering lengths with an odd quantity of pitches male ends are supplied unless otherwise mentioned. Clevis pins, usually with cotters at every single end, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are often (but not usually) connected to the clevis block by using a cottered kind connecting website link. The connecting hyperlink may be the female end element in this case.
Leaf Chain Selection
Make use of the following formula to confirm the choice of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Optimum Chain Stress
DF: Duty Factor
SF: Service Component
Note that the maximum allowable chain speed for leaf chains is 100ft per minute.