STANDARD PRODUCT CATALOGUE
handling systems
page
Line shaft is a clean, quiet, inexpensive, and versatile conveyor, but we recommend that you have an experienced estimator check your selection.
(not to exceed 0.75 lbs per roll)
driven curves
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PACIFIC
CONVEYORS LTD. STANDARD PRODUCT CATALOGUE |
engineered material handling systems |
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Technical Page 7 HORSEPOWER CALCULATIONS | |||||||||||||||||||||||
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FOR LINE SHAFT DRIVEN ROLLER CONVEYORS | |||||||||||||||||||||||
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Line shaft
roll center selection,
and horsepower calculation is complicated by
the fact that each drive belt only delivers 0.75 lbs of pull.
This means that, even though
nominal roll capacity is 300
lbs, each roll will move only 15 lbs.
Increasing power
beyond this value will result in increased
belt slippage, but no
greater carrying capacity. Line shaft is a clean, quiet, inexpensive, and versatile conveyor, but we recommend that you have an experienced estimator check your selection. |
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Formula | |||||||||||||||||||||||
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Model 738LS light duty | PRODUCT WEIGHT (1) (lbs) | Total weight of product on conveyor | |||||||||||||||||||||
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Model 796LS medium duty | + ROLL WEIGHT (lbs) | weights and tables | |||||||||||||||||||||
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+ LINE SHAFT WEIGHT | 3 lbs per foot | ||||||||||||||||||||||
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+ DRIVE WEIGHT (lbs) | Best estimate (for small drives, use 250 lbs) | |||||||||||||||||||||
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= SUBTOTAL (1) (lbs) | |||||||||||||||||||||||
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x FRICTION FACTOR (1) | Belt driven live roller 0.10 weights and tables | ||||||||||||||||||||||
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= SUBTOTAL (1) (lbs) | BELT PULL DUE TO PRODUCT IN MOTION | ||||||||||||||||||||||
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PRODUCT WEIGHT (2) (lbs) | Portion of weight of product to be accumulated | ||||||||||||||||||||||
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x FRICTION FACTOR (2) | Equivalent to belt on steel slider tread (0.3) | ||||||||||||||||||||||
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= SUBTOTAL (2) (lbs) |
BELT PULL DUE TO
ACCUMULATED PRODUCT (not to exceed 0.75 lbs per roll) |
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Model 738LSC light duty curve | |||||||||||||||||||||||
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Model 796LSC curve module | + SUBTOTAL (1) (lbs) | Calculated in previous lines | |||||||||||||||||||||
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Model 796LSS spur module | = TOTAL BELT PULL (lbs) | TOTAL REQUIRED BELT PULL | |||||||||||||||||||||
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Model 796LSG gate module | x BELT SPEED (fpm) | ||||||||||||||||||||||
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Model 796LSRBT transfer | = WORK RATE (ft lbs/min) | NOMINAL WORK RATE | |||||||||||||||||||||
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Do not accumulate on line
shaft driven curves |
x 1.25 contingency | Contingency allowance for drive inefficiencies | |||||||||||||||||||||
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x 1.25 contingency | Contingency allowance for occasional overloads | ||||||||||||||||||||||
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divide by 33,000 | (one horsepower = 33,000 ft lbs per minute | ||||||||||||||||||||||
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= HORSE POWER | ENERGY REQUIREMENT 1HP = 0.75 kw | ||||||||||||||||||||||
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* Treat all slave driven curves and spurs as one 10'0" section | |||||||||||||||||||||||
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