? Type of input power (electrical motor, inner combustion engine with mechanical or hydraulic drive).
? Type of tools to get driven.
? Amount of horsepower essential to provide suffi cient electrical power to your driven shaft.
? Full load speed of the fastest operating shaft (rpm).
? Desired velocity of the slow running shaft ( or the expected pace ratio). NOTE: If speeds are variable determine the horsepower to be transmitted at just about every velocity.
? 
Diameters from the drive and driven shafts . . . This value might restrict the minimal amount of teeth for that sprockets.
? Center distance with the shafts.
? Note the place and any area limitations that could exist. Commonly these limitations are on the highest diameter of sprockets (this restricts the usage of single strand chains) or even the width with the chain (this restricts using multi-strand chains).
? Conditions on the drive including a determination with the class of load (uniform, moderate or heavy), significant working temperatures or chemically aggressive environments should be mentioned.
Abbreviations Utilized in Equations
N Amount of teeth around the significant sprocket.
n Amount of teeth about the modest sprocket.
R Speed in revolutions per minute (rpm) from the massive sprocket.
r Speed in revolutions per minute (rpm) in the small sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating on the drive motor or engine.
KW Kilowatt electrical power rating of drive motor or engine if using metric units.
SF Support Factor
