Leaf Chains are made for substantial load, slow velocity tension linkage applications. Normally these are specifi ed for reciprocating motion lifting gadgets this kind of as fork lifts or cranes. These chains are ordinarily provided to a specifi c length and are linked to a clevis block at every finish. The clevis may perhaps accommodate male ends (within or in some cases named “articulating” backlinks) or female ends (outside or even the back links to the pin link) as required (see illustration beneath)
Leaf chains can be found in three series; AL (light duty), BL (hefty duty), or LL (European normal). For new choices we propose the BL series in preference to the AL series because the latter continues to be discontinued like a acknowledged ASME/ANSI typical series chain. BL series chains are created in accordance with all the ASME/ANSI B29.eight American Leaf Chain Normal. LL series chains are developed in accordance with all the ISO 606 worldwide leaf chain standard.
A chain with an even number of pitches usually has a 1 male and one particular female finish. It is actually far more prevalent to get the chain possess an odd number of pitches in which case the both ends is going to be both male (most typical) or female (much less com-mon). When ordering lengths with an odd number of pitches male ends are supplied unless of course otherwise noted. Clevis pins, usually with cotters at every finish, are made use of to connect male chain ends to female clevis blocks. Chains with female ends are often (but not normally) linked towards the clevis block that has a cottered variety connecting link. The connecting website link will be the female finish part in this case.
Leaf Chain Assortment
Use the following formula to verify the choice of leaf chain:
Minimum Greatest Strength > T x DF x SF
T: Calculated Highest Chain Stress
DF: Duty Element
SF: Support Factor
Note that the highest allowable chain pace for leaf chains is 100ft per minute.