ASME B29.100:2002 pdf download

ASME B29.100:2002 pdf download.PRECISION POWER TRANSMISSION ROLLER CHAINS, ATTACHMENTS, AND SPROCKETS
1 ROLLER CHAIN
1.1 Nomenclature
The following definitions are illustrated in Fig. 1. connecting link (cotter pin type): an outside link consisting of a pin link plate E, two assembled pins G–G, a detach- able pin link plate D, and two cotters H–H. Three types of detachable pin link plates are available; one with a slip fit, one with a degree of press fit (drive fit), and one with a full press fit (as in conventional chain con- struction). connecting link (spring clip type): a connecting link gener- ally as described above, except that the detachable link plate is retained bya one-piece springclip Kthatengages grooves cut in the ends of the pins. offset link: a link consisting of two offset link plates I–I, a bushing B, a roller C, a removable pin J, and cotter H. offset section: a two-link section consisting of a roller link and an offset link, which are connected by a riveted press-fit pin. pin link: an outside link consisting of two pin link plates E–E assembled with two pins F–F. roller chain: a series of alternately assembled roller links and pin links in which the pins articulate inside the bushings and the rollers are free to turn on the bushings. Pins and bushings are press fit in their respective link plates. Roller chain may be single strand, having one row of roller links, or multiple strand, having more than one row of roller links, and in which center plates L are located between the strands of roller links. Center plates may be slip fit or press fit on the pin as agreed between the chain manufacturer and user.
1.2 General Proportions
(a) The roller diameter is approximately 5 ⁄ 8 ? pitch. (b) The chain width is defined as the distance between roller link plates and equals approximately 5 ⁄ 8 ? chain pitch. (c) The pin diameter is approximately 5 ⁄ 16 ? pitch or one-half of the roller diameter. (d) The thickness of link plates for the standard series is approximately 1 ⁄ 8 ? pitch. (e) The thickness of link plates for the heavy series chain of any pitch is approximately that of the next larger pitch standard series chain. (f) The maximum height of roller link plates is 0.95 ? pitch. (g) The maximum height of pin link plates is 0.82 ? pitch. (h) Although chamfers are shown on the link plates illustrated, chamfering is not a requirement and is done at the option of the manufacturer.
1.3 Numbering System —Standard Chain Numbers
For the chains shown in this Standard, the right-hand digit in the chain designation is zero for roller chains of the usual proportions, 1 for a lightweight chain, and 5 for a rollerless bushing chain. The numbers to the left of the right-hand digit denote the number of 1 ⁄ 8 in. in the pitch. The letter H following the chain number denotes the heavy series. The hyphenated number 2 suffixed to the chain number denotes a double strand; 3, a triple strand; 4, a quadruple strand chain; etc. Heavy series chains made in 3 ⁄ 4 in. (19.05 mm) and larger pitches differ from the standard series in thickness of link plates. Their value is only in the acceptance of higher loads during operation at lower speeds.
1.4 Chain Strength Requirements
1.4.1 Minimum Ultimate Tensile Strength (a) Single Strand Chain. Standard series single strand chains meeting the requirements of this Standard will have a minimum ultimate tensile strength equal to or greater than the values listed in Table 1A or 1B. (b) Multiple Strand Chain. For multiple strand chain, the minimum ultimate tensile strength equals that of a single strand multiplied by the number of strands.