? Type of input power (electrical motor, internal combustion engine with mechanical or hydraulic drive).
? Type of tools to be driven.
? Amount of horsepower necessary to supply suffi cient electrical power on the driven shaft.
? Full load speed from the fastest running shaft (rpm).
? Desired speed of your slow working shaft ( or even the essential speed ratio). NOTE: If speeds are variable ascertain the horsepower to be transmitted at each speed.
? Diameters of the drive and driven shafts . . . This worth may restrict the minimal quantity of teeth for your sprockets.
? Center distance of the shafts.
? Note the place and any space limitations that may exist. Typically these limitations are about the optimum diameter of sprockets (this restricts the use of single strand chains) or the width with the chain (this restricts the use of multi-strand chains).
? Conditions with the drive together with a determination from the class of load (uniform, reasonable or heavy), significant operating temperatures or chemically aggressive environments must be noted.
Abbreviations Used in Equations
N Number of teeth within the huge sprocket.
n Amount of teeth around the smaller sprocket.
R Velocity in revolutions per minute (rpm) with the large sprocket.
r Speed in revolutions per minute (rpm) in the smaller sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating with the drive motor or engine.
KW Kilowatt electrical power rating of drive motor or engine if using metric units.
SF Service Factor