? Type of input power (electrical motor, internal combustion engine with mechanical or hydraulic drive).
? Type of equipment to be driven.
? Amount of horsepower necessary to provide suffi cient electrical power towards the driven shaft.
? Full load velocity of your quickest working shaft (rpm).
? Desired speed in the slow working shaft ( or even the demanded speed ratio). NOTE: If speeds are variable determine the horsepower for being transmitted at just about every speed.
? Diameters with the drive and driven shafts . . . This value may perhaps restrict the minimal quantity of teeth to the sprockets.
? Center distance on the shafts.
? Note the position and any area limitations that may exist. Usually these limitations are around the greatest diameter of sprockets (this restricts the use of single strand chains) or the width in the chain (this restricts the usage of multi-strand chains).
? Conditions on the drive which includes a determination of your class of load (uniform, moderate or heavy), extreme operating temperatures or chemically aggressive environments needs to be mentioned.
Abbreviations Used in Equations
N Quantity of teeth to the significant sprocket.
n Quantity of teeth about the little sprocket.
R Speed in revolutions per minute (rpm) on the large sprocket.
r Velocity in revolutions per minute (rpm) on the little sprocket.
C Shaft center distance in chain pitches.
HP Horsepower rating on the drive motor or engine.
KW Kilowatt power rating of drive motor or engine if utilizing metric units.
SF Support Factor