Roller Chains as Tension Linkages

Standard and special roller chains are often used for static or slow-moving tensile applications. They are used where compactness and flexibility or engagement with a sprocket is needed. Some examples of these applications are for supporting a floating machine head, manual and electric 

Rollerless chains are also used as tension linkages where a chain with the wear resistance of a hardened bushing is needed. Most of these chains have the same basic dimensions as standard roller chain, but they do not have the free-turning roller over the bushings. Because of this feature, these chains usually do not run on sprockets. RoUerless chains are not desaibed by an American National Standard. However, they may be identified with numbers taken from ASME B29.1. The chain number ends with a 5, indicating the roUerless feature. For example, a k-va. pitch no. 60 chain without a roller becomes a no. 65 chain. 

Tension linkage chains generally experience high loads at low speeds. They do not fall within the published horsepower tables given in chapter 5. Do not attempt to use horsepower ratings to select tension linkage chains. There are many types and sizes of chains available for use as tension 

FIGURE 8-1 Comparison of chains showing sizes of tension linkage chains. 

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