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Chain length can be determined accurately by taking the following factors into account:
• centre distance between sprockets (driver and driven)
• chain pitch • number of teeth on the (driver and driven) • arc of contact.
Center distance between sprockets centre distance Figure 13.9 Length of chain
Te centre distance between sprockets is measured in millimeters from the centre point of the driving sprocket to the centre point of the driven sprocket.
tight side
slack side driver sprocket single strand chain driven sprocket Figure 13.10 Center distance between sprockets 13.8 Chain pitch
Te chain pitch is the distance in millimeters, between the centres of adjacent (next to) joint members. Chains can be classified in single pitch and double pitch roller chains. Te pitch is the dimension which determines the other dimensions for a standard chain. A shorter pitch allows for higher operating speeds on a roller chain.