? Type of input energy (electric motor, inner combustion engine with mechanical or hydraulic drive).
? Type of equipment to become driven.
? Amount of horsepower demanded to provide suffi cient electrical power towards the driven shaft.
? Full load velocity from the quickest working shaft (rpm).
? Desired velocity of the slow working shaft ( or the demanded speed ratio). NOTE: If speeds are variable figure out the horsepower to be transmitted at each and every velocity.
? Diameters of the drive and driven shafts . . . This value might restrict the minimum amount of teeth for that sprockets.
? Center distance from the shafts.
? Note the position and any room limitations that may exist. Typically these limitations are about the optimum diameter of sprockets (this restricts the use of single strand chains) or even the width of your chain (this restricts using multi-strand chains).
? Conditions of the drive which include a determination of your 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 Quantity of teeth within the small sprocket.
R Velocity in revolutions per minute (rpm) from the large sprocket.
r Velocity in revolutions per minute (rpm) of the tiny sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating of the drive motor or engine.
KW Kilowatt power rating of drive motor or engine if working with metric units.
SF Support Factor