Silent Chain Drive Selection Procedure

Selection of a complete silent chain drive begins with the gathering of as much of the following 

Driving shaft information speed, diameter, keyway size. Driven shaft information speed, diameter, keyway size. Shaft center distance and amount of adjnstment available. Drive arrangement. 

Choose an appropriate service factor for the power soiuce, type of driven load, daily duty cycle, and operating conditions. Table 7-1 provides a list of base service factors for a few different types of eqnipment. For example, a centrifugal blower application powered by an electric motor would have a service factor of 1.3. Extensive lists of base service factors are available in the ASME B29.2 standard and from most chain manufacmrers. 

Calcnlate the design power by multiplying the input power by the service factor determined in step 2. Step 4 Seeect Preeiminary Pitch 

Select the munber of teeth on the small sprocket, then verify in Table 7-2 that it will accommodate the shaft diameter and keyway. Remember that the best performance is obtained when sprockets have 21 or more teeth. 

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This chapter provides guidelines and procedures for selecting silent chain and sprockets for drives. The use of silent chain for conveying is not discussed here such information can be obtained from the chain manufacturer. 

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