1. Transmission Chains
1.6.3 Inverted Tooth Chain (Silent Chain) Transmission Application Example Silent Chains are used for the camshaft drive of the mid- to large-size motorcycle engines and automobile engines in the United States, the transfer-case drive in four-wheel-drive vehicles, and the primary drive between the engine and transmission, as well as in other high-speed applications (Figure 1.28).
Figure 1.28 Silent Chain
Construction and Features (1) Silent Chains have a very simple construction: only plates and pins. Today’s Silent Chains are actually an update of a 19th-century design. ANSI B29.2M-1982 regulates the standard pitch, width, and kilowatt ratings of the chains and sprockets. (2) There are eight different pitches from 9.52 mm to 50.8 mm. (3) The link plate receives tension and has a notch for engaging the sprockets. There is no notch on the guide plate. These plates act as guides for the sprockets. (4) Pins may be round or have other shapes, such as D-shape (Figure 1.29). (5) All of the chain components share the tension. Silent Chains have higher capacity than roller chains of the same width.
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