? Type of input electrical power (electric motor, inner combustion engine with mechanical or hydraulic drive).
? Type of products to become driven.
? Amount of horsepower demanded to provide suffi cient power towards the driven shaft.
? Full load speed with the fastest operating shaft (rpm).
? Desired pace in the slow operating shaft ( or even the needed velocity ratio). NOTE: If speeds are variable decide the horsepower for being transmitted at each velocity.
? Diameters on the drive and driven shafts . . . This worth might restrict the minimal 
variety of teeth for that sprockets.
? Center distance on the shafts.
? Note the position and any area limitations that may exist. Typically these limitations are about the greatest diameter of sprockets (this restricts the use of single strand chains) or the width with the chain (this restricts the use of multi-strand chains).
? Conditions of the drive which includes a determination in the class of load (uniform, moderate or heavy), significant operating temperatures or chemically aggressive environments need to be mentioned.
Abbreviations Used in Equations
N Quantity of teeth to the big sprocket.
n Quantity of teeth about the modest sprocket.
R Speed in revolutions per minute (rpm) on the significant sprocket.
r Velocity in revolutions per minute (rpm) on the smaller sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating of your drive motor or engine.
KW Kilowatt energy rating of drive motor or engine if applying metric units.
SF Services Factor
Necessary Facts For Drive Chain Selection
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