This Standard is a consolidation of two ASME Standards, ASME B29.16M-1995 (Welded Steel-Type Mill Chains, Attachments, and Sprocket Teeth) and ASME B29.18M-1993 (Welded Steel-Type Drag Chains, Attachments, and Sprocket Teeth). These two Standards were combined into one because of the similarity of construction and the usual applications for the two types of chains.
The welded-steel-type mill chains (B29.16M) were developed to provide a series of steel chains similar to cast chains of the detachable, mill, and combination types. A welded steel-type mill chain is a series of identical welded offset links having barrels to contact the sprocket teeth, and pins which articulate in the barrels of the links. Pins are fixed in the sidebar pitch holes by either press fits and/or mechanical locks , such as flats, to prevent rotation of the pins in the sidebar pitch holes. The main topics of B29.16M are (a) Assembled chain; (b) Disassembled chain; (c) Dimensions of chain; and (d) Sprocket tooth form. There are also Tables for (a) General chain dimensions, Minimum ultimate tensile strength rating, Strand length, and Measuring load for checking chain lengths; (b) Maximum and minimum controlling dimensions for interchangeable chain links; (c) Chain clearance dimensions; (d) A1, A2, A22, F2, F4, K1, K2 and W1 attachments; (e) Sprockets – Maximum eccentricity and Face runout tolerances; and (f) Sprocket tooth form factors. Although the welded-steel type mill chains were introduced many years ago for the forest products industries, their extended usage in a variety of materials handling and drive applications in recent years stimulated standardization of the basic types.
The welded-steel-type drag chains (B29.18M) were developed to provide a series of steel chains similar to cast drag chains in the offset and combination types. Welded steel drag chains were originally introduced for the forest products industries and their expanded usage in recent years called for standardization of basic sizes. A welded-steel-type drag chain is a series of identical welded offset links having barrels to contact the sprocket teeth, and pins which articulate in the barrels of the links. Pins are fixed in the sidebar pitch holes by either press fits and/or mechanical locks, such as flats, to prevent rotation of the pins in the sidebar pitch holes. The main topics are (a) general chain proportions and designations; (b) Attachments; (c) Sprocket tooth form; and (d) Sprocket design data. There are also Tables for (a) Barrel cross section; (b) General chain dimensions, Minimum ultimate tensile stregth, measuring length, and Load for checking chain lengths; (c) Maximum and minimum controlling dimensions for interchangeable chain links; (d) Chain clearance dimensions; (e) C1, C3, C4, RR and wing-type attachments; (f) Sprocket tooth form factors; and (g) Sprockets: Maximum eccentricity and Face runout tolerances.
