? Type of input electrical power (electrical motor, inner combustion engine with mechanical or hydraulic drive).
? Type of tools to be driven.
? Amount of horsepower needed to provide suffi cient energy for the driven shaft.
? Full load pace on the quickest operating shaft (rpm).
? Desired speed in the slow working shaft ( or the needed pace ratio). NOTE: If speeds are variable establish the horsepower for being transmitted at each and every velocity.
? Diameters in the drive and driven shafts . . . This value may well restrict the minimal quantity of teeth for that sprockets.
? Center distance with the shafts.
? Note the position and any room limitations that could exist. Normally these limitations are about the optimum diameter of sprockets (this restricts the use of single strand chains) or even the width of the chain (this restricts the use of multi-strand chains).
? Conditions on the drive such as a determination on the class of load (uniform, moderate or heavy), significant working temperatures or chemically aggressive environments must be noted.
Abbreviations Utilized in Equations
N Amount of teeth 
around the massive sprocket.
n Number of teeth around the small sprocket.
R Pace in revolutions per minute (rpm) in the substantial sprocket.
r Speed in revolutions per minute (rpm) of the little sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating on the drive motor or engine.
KW Kilowatt energy rating of drive motor or engine if applying metric units.
SF Service Factor
Required Info For Drive Chain Assortment
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