? Type of input energy (electrical motor, internal combustion engine with mechanical or hydraulic drive).
? Type of equipment to become driven.
? Amount of horsepower required to supply suffi cient power for the driven shaft.
? Full load pace in the quickest running shaft (rpm).
? Desired speed in the slow operating shaft ( or even the required speed ratio). NOTE: If speeds are variable establish the horsepower for being transmitted at every pace.
? Diameters with the drive and driven shafts . . . This worth may well restrict the minimum number of teeth for the sprockets.
? Center distance from the shafts.
? Note the position and any space limitations that may exist. Generally these limitations are about the maximum diameter of sprockets (this restricts the use of single strand chains) or the width from the chain (this restricts the use of multi-strand chains).
? Conditions of the drive like a determination of the class of load (uniform, reasonable or hefty), serious operating temperatures or chemically aggressive environments must be noted.
Abbreviations Used in Equations
N Quantity of teeth about the big sprocket.
n Quantity of teeth on the small sprocket.
R Pace in revolutions per minute (rpm) with the significant sprocket.
r Pace in revolutions per minute (rpm) of your tiny sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating of your drive motor or engine.
KW Kilowatt power rating of drive motor or engine if employing metric units.
SF Service Factor