? Type of input power (electrical motor, internal combustion engine with mechanical or hydraulic drive).
? Type of equipment to get driven.
? Amount of horsepower essential to supply suffi cient electrical power on the driven shaft.
? Full load velocity of the quickest working shaft (rpm).
? Desired pace in the slow running shaft ( or the necessary velocity ratio). NOTE: If speeds are variable decide the horsepower to get transmitted at each and every velocity.
? Diameters of your drive and driven shafts . . . This worth may well restrict the minimal amount of teeth for that sprockets.
? Center distance from the shafts.
? Note the position and any space limitations that may exist. Generally these limitations are within the greatest diameter of sprockets (this restricts using single strand chains) or the width from the chain (this restricts 
the usage of multi-strand chains).
? Conditions of your drive like a determination of the class of load (uniform, moderate or heavy), severe working temperatures or chemically aggressive environments really should be noted.
Abbreviations Used in Equations
N Amount of teeth over the significant sprocket.
n Number of teeth to the modest sprocket.
R Velocity in revolutions per minute (rpm) in the significant sprocket.
r Pace in revolutions per minute (rpm) of your compact sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating of the drive motor or engine.
KW Kilowatt electrical power rating of drive motor or engine if making use of metric units.
SF Support Factor
