? Type of input energy (electric motor, internal combustion engine with mechanical or hydraulic drive).
? Type of tools to become driven.
? Amount 
of horsepower needed to supply suffi cient electrical power for the driven shaft.
? Full load pace of the quickest operating shaft (rpm).
? Desired velocity of the slow operating shaft ( or even the necessary speed ratio). NOTE: If speeds are variable determine the horsepower for being transmitted at each and every pace.
? Diameters from the drive and driven shafts . . . This worth may possibly restrict the minimal quantity of teeth for that sprockets.
? Center distance of your shafts.
? Note the place and any space limitations that may exist. Typically these limitations are over the greatest diameter of sprockets (this restricts the use of single strand chains) or the width from the chain (this restricts using multi-strand chains).
? Conditions of the drive which includes a determination with the class of load (uniform, moderate or heavy), significant operating temperatures or chemically aggressive environments must be mentioned.
Abbreviations Utilized in Equations
N Variety of teeth within the big sprocket.
n Quantity of teeth on the little sprocket.
R Speed in revolutions per minute (rpm) on the massive sprocket.
r Velocity in revolutions per minute (rpm) on the small sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating from the drive motor or engine.
KW Kilowatt power rating of drive motor or engine if applying metric units.
SF Services Factor
Required Facts For Drive Chain Selection
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