? Type of input power (electrical motor, inner combustion engine with mechanical or hydraulic drive).
? Type of products for being driven.
? 
Amount of horsepower needed to provide suffi cient energy towards the driven shaft.
? Full load pace of the fastest running shaft (rpm).
? Desired velocity of your slow working shaft ( or the necessary pace ratio). NOTE: If speeds are variable figure out the horsepower for being transmitted at each velocity.
? Diameters on the drive and driven shafts . . . This value might restrict the minimal number of teeth for your sprockets.
? Center distance on the shafts.
? Note the place and any space limitations that may exist. Generally these limitations are over the optimum diameter of sprockets (this restricts using single strand chains) or even the width in the chain (this restricts the use of multi-strand chains).
? Conditions in the drive including a determination from the class of load (uniform, reasonable or heavy), serious operating temperatures or chemically aggressive environments must be mentioned.
Abbreviations Used in Equations
N Quantity of teeth over the substantial sprocket.
n Variety of teeth over the little sprocket.
R Pace in revolutions per minute (rpm) of your substantial sprocket.
r Velocity in revolutions per minute (rpm) from the little sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating with the drive motor or engine.
KW Kilowatt electrical power rating of drive motor or engine if making use of metric units.
SF Support Factor