Leaf Chains are created for large load, slow pace stress linkage applications. Typically they may be specifi ed for reciprocating movement lifting products this kind of as fork lifts or cranes. These chains are generally supplied to a specifi c length and are linked to a clevis block at each end. The clevis may possibly accommodate male ends (inside or at times known as “articulating” hyperlinks) or female ends (outdoors or even the backlinks within the pin website link) as expected (see illustration below)
Leaf chains can be found in three series; AL (light duty), BL (heavy duty), or LL (European standard). For new selections we advise the BL series in preference on the AL series as the latter has been discontinued as being a recognized ASME/ANSI normal series chain. BL series chains are generated in accordance with the ASME/ANSI B29.eight American Leaf Chain Conventional. LL series chains are created in accordance with the ISO 606 international leaf chain common.
A chain with an even amount of pitches generally includes a one particular male and a single female end. It truly is much more frequent to possess the chain possess an odd variety of pitches through which situation the the two ends will probably be either male (most common) or female (less com-mon). When ordering lengths with an odd variety of pitches male ends are provided unless otherwise mentioned. Clevis pins, commonly with cotters at each end, are utilised to connect male chain ends to female clevis blocks. Chains with female ends are sometimes (but not constantly) connected to your clevis block having a cottered kind connecting website link. The connecting hyperlink could be the female finish element in this case.
Leaf Chain Variety
Utilize the following formula to confirm the selection of leaf chain:
Minimum Ultimate Power > T x DF x SF
T: Calculated Optimum Chain Tension
DF: Duty Factor
SF: Services Issue
Note the optimum allowable chain speed for leaf chains is 100ft per minute.