Machinery's Handbook, 31st Edition
2606 Belt Storage, Handling, and Service Factors Table 38. Service Factors for V-Belts Driving Unit AC Motors: Normal Torque, Squirrel Cage, Synchronous and Split Phase. DC Motors: Shunt Wound. Engines: Multiple Cylinder Internal Combustion.
Continuous Service (16-24
Intermittent Service (3-5 hours daily or seasonal)
Normal Service (8-10 hours daily)
hours daily)
Types of Driven Machines
Agitators for liquids; Blowers and exhausters; Centrifugal pumps & compressors; Fans up to 10 horsepower; Light duty conveyors Belt conveyors for sand, grain, etc.; Dough mixers; Fans over 10 horsepower; Generators; Line shafts; Laundry machinery; Machine tools; Punches, presses, shears; Printing machinery; Positive displacement rotary pumps; Revolving and vibrating screens Brick machinery; Bucket elevators; Exciters; Piston compressors; Conveyors (drag, pan, screw); Hammer mills; Paper mill beaters; Piston pumps; Positive displacement blowers; Pulverizers; Saw mill and woodworking machinery; Textile machinery Crushers (gyratory, jaw, roll); Mills (ball, rod, tube); Hoists; Rubber calendars, extruders, mills
1.1
1.2
1.3
1.2
1.3
1.4
1.4
1.5
1.6
1.5
1.6
1.8
AC Motors: High Torque, High Slip, Repulsion-Induction, Single Phase, Series Wound, Slip Ring. DC Motors: Series Wound, Compound Wound. Engines: Single Cylinder Internal Combustion. Line Shafts , Clutches
Driving Unit
Continuous Service (16-24
Intermittent Service (3-5 hours daily or seasonal)
Normal Service (8-10 hours daily)
Types of Driven Machines
hours daily)
Agitators for liquids; Blowers and exhausters; Centrifugal pumps & compressors; Fans up to 10 horsepower; Light duty conveyors Belt conveyors for sand, grain, etc.; Dough mixers; Fans over 10 horsepower; Generators; Line shafts; Laundry machinery; Machine tools; Punches, presses, shears; Printing machinery; Positive displacement rotary pumps; Revolving and vibrating screens Brick machinery; Bucket elevators; Exciters; Piston compressors; Conveyors (drag, pan, screw); Hammer mills; Paper mill beaters; Piston pumps; Positive displacement blowers; Pulverizers; Saw mill and woodworking machinery; Textile machinery Crushers (gyratory, jaw, roll); Mills (ball, rod, tube); Hoists; Rubber calendars, extruders, mills
1.1
1.2
1.3
1.2
1.3
1.4
1.4
1.5
1.6
1.5 1.8 The machines listed above are representative samples only. Select the group listed above whose load characteristics most closely approximate those of the machine being considered. 1.6 type up to approximately 120 inch (3.05 m) are normally shipped in a “nested” configura tion and should be stored in the same manner. Nests are formed by laying a belt on its side on a flat surface and placing as many belts inside the first belt as possible without undue force. When the nests are tight and are stacked with each rotated 180 ° from the one below, they may be stacked without damage. Belts of this type over 120 in. may be “rolled up” and tied for shipment. These rolls may be stacked for easy storage. Care should be taken to avoid small bend radii which could damage the belts. Variable Speed Belts: Variable speed belts are more sensitive to distortion than most other belts, and should not be hung from pins or racks but stored on shelves in the sleeves in which they are shipped. Service Factors: Service factors for V-belts are listed in Table 38.
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