? Type of input electrical power (electrical motor, inner combustion engine with mechanical or hydraulic drive).
? Type of equipment to get driven.
? Amount of horsepower expected to supply suffi cient power to your driven shaft.
? Full load velocity on the fastest working shaft (rpm).
? Desired speed on the slow working shaft ( or the expected pace ratio). NOTE: If speeds are variable establish the horsepower to be transmitted at just about every velocity.
? Diameters with the drive and driven shafts . . . This value may perhaps restrict the minimum amount of teeth for your sprockets.
? 
Center distance in the shafts.
? Note the position and any area limitations that could exist. Ordinarily these limitations are around the optimum diameter of sprockets (this restricts the usage of single strand chains) or even the width on the chain (this restricts the use of multi-strand chains).
? Conditions in the drive together with a determination from the class of load (uniform, reasonable or heavy), serious working temperatures or chemically aggressive environments should be noted.
Abbreviations Used in Equations
N Number of teeth over the substantial sprocket.
n Amount of teeth within the smaller sprocket.
R Velocity in revolutions per minute (rpm) of your large sprocket.
r Speed in revolutions per minute (rpm) of your tiny sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating with the drive motor or engine.
KW Kilowatt energy rating of drive motor or engine if utilizing metric units.
SF Support Factor
