Leaf Chains are manufactured for substantial load, slow speed tension linkage applications. Generally they are specifi ed for reciprocating movement lifting units such as fork lifts or cranes. These chains are generally supplied to a specifi c length and are linked to a clevis block at each finish. The clevis may well accommodate male ends (inside or from time to time called “articulating” back links) or female ends (outside or the backlinks on the pin hyperlink) as necessary (see illustration below)
Leaf chains can be found in 3 series; AL (light duty), BL (heavy duty), or LL (European common). For new selections we advocate the BL series in preference to your AL series since the latter continues to be discontinued as being a recognized ASME/ANSI normal series chain. BL series chains are made in accordance with all the ASME/ANSI B29.eight American Leaf Chain Standard. LL series chains are created in accordance using the ISO 606 international leaf chain normal.
A chain with an even amount of pitches normally has a a single male and one particular female finish. It’s much more frequent to have the chain possess an odd variety of pitches through which situation the each ends will probably be either male (most typical) or female (less com-mon). When ordering lengths with an odd quantity of pitches male ends are provided unless of course otherwise noted. Clevis pins, typically with cotters at just about every finish, are employed to connect male chain ends to female clevis blocks. Chains with female ends are frequently (but not generally) connected on the clevis block having a cottered form connecting link. The connecting hyperlink is the female end component in this instance.
Leaf Chain Choice
Utilize the following formula to verify the collection of leaf chain:
Minimal Greatest Power > T x DF x SF
T: Calculated Maximum Chain Tension
DF: Duty Issue
SF: Services Component
Note that the maximum allowable chain velocity for leaf chains is 100ft per minute.