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Facts & Figures Book - KPI-JCI

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HOW TO DETERMINE CONVEYOR BELT SPEEDFive factors are required to determine conveyor beltspeed.A = Motor RPMB = Motor Sheave Dia. (inches)C = Reducer Sheave Dia. (inches)D = Reducer RatioE = Dia. of Pulley (inches)A x B ÷ C = Reducer Input Speed (RPM)Reducer Input Speed (RPM) ÷ D = Drive PulleyRPMDrive Pulley RPM x 0.2618 x E = Conveyor BeltSpeed (FPM)Example: Determine Conveyor Belt Speed of a 30” x 60’conveyor with a 15 HP, 1750 RPM electric motor drive,16” head pulley, 6.2” diameter motor sheave, 9.4” diameterreducer sheave and a 15:1 reducer.A = 1750 RPMB = 6.2C = 9.4D = 15E = 161750 x 6.2 ÷ 9.4 = 1154 RPM (Reducer Input)1154 RPM ÷ 15 = 77 RPM (Pulley Speed)77 RPM x 0.2618 x 16 = 322 FPM Conveyor BeltSpeedNOTE:1. To speed up the conveyor belt, a smaller reducer sheavecould be used or a larger motor sheave could be used.2. To slow down the conveyor belt, a larger reducer sheavecould be used or a smaller motor sheave could be used.Material Handling193

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