PACIFIC CONVEYORS LTD.
STANDARD PRODUCT CATALOGUE
engineered material
handling systems
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Technical Page 4  HORSEPOWER CALCULATIONS  
FOR INCLINE BELT CONVEYORS
Formula
PRODUCT WEIGHT (1) (lbs) Total weight of product on conveyor
+ BELT WEIGHT (lbs) weights and tables
+ ROLL WEIGHT (lbs) weights and tables   (zero for slider bed conveyors)
+ DRIVE WEIGHT (lbs) Best estimate  (for small drives, use 250 lbs)
= SUBTOTAL (1) (lbs)  
FRICTION FACTOR (1) Belt driven live roller  0.10  weights and tables
= SUBTOTAL (1) (lbs) BELT PULL DUE TO PRODUCT IN MOTION
PRODUCT WEIGHT (2) (lbs) Portion of weight of product on incline section
Model 700SBF slider bed x sine (a) Equivalent to belt on steel slider tread (0.3)
Model 796RBF roller bed = SUBTOTAL (2) (lbs) BELT PULL DUE TO ELEVATING PRODUCT
+ SUBTOTAL (1) (lbs) Calculated in previous lines
= TOTAL BELT PULL (lbs) TOTAL REQUIRED BELT PULL
x BELT SPEED (fpm)  
= WORK RATE (ft lbs/min) NOMINAL WORK RATE
x 1.25 contingency Contingency allowance for drive inefficiencies
x 1.25 contingency Contingency allowance for occasional overloads
divide by 33,000 (one horsepower = 33,000 ft lbs per minute
= HORSE POWER ENERGY REQUIREMENT  1HP = 0.75 kw

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