Prime Mover Factors Duty Factor Duty Factor Cranes & Hoists Agitators MainHoist 2.50 Vertical & Horizontal Screw, Propeller, Paddle 1.00 SkipHoist 2.50 Blowers Slope 2.00 Centrifugal 0.75 Bridge, Travel or Trolley 2.00 Lobe or Vane 1.25 Dynamometer 1.00 Clarifier or Classifier 1.00 Elevators Compressors Bucket, Centrifugal Discharge 1.25 Centrifugal 0.75 Freight or Passenger 2.00 Lobe or Rotary 1.25 Gravity Discharge 1.25 Reciprocating with Flywheel & Gear between Compressor & Prime Mover Escalators 1.00 1 cylinder, single acting 3.00 Exciter, Generator 1.00 1 cylinder, double acting 3.00 Extruder, Plastic Fans 2 cylinders, single acting 3.00 Centrifugal 0.75 2 cylinders, double acting 3.00 Cooling Tower 2.00 3 cylinders, single acting 3.00 Forced Draught - Across the Line start 1.50 3 cylinders, double acting 2.00 Forced Draught Motor Driven through fluid or electric slip clutch 1.00 4 or more cylinders, single acting 1.75 Gas Recirculating 1.50 4 or more cylinders, double acting 1.75 Induced Draught with Damper Control or Blade Cleaner 1.25 Conveyors Induced Draught without Controls 2.00 Apron, Assembly, Belt, Chain, Flight, Screw 1.00 Mine Ventilation - Surface 2.00 Bucket 1.25 Mine Ventilation - Underground 2.50 Live Roll, Shaker & Reciprocating 3.0 Mixers (See Agitators) Feeders Concrete 1.75 Apron, Belt, Disc, Screw 1.00 Muller 1.50 Reciprocating 2.50 Press, Printing 1.50 Generators PugMill 1.75 Even Load 0.75 Pulverizers Hoist or Railway Service 1.50 Hammermill 1.75 Welder Load 2.00 Hog 1.75 Hammermill 1.75 Roller 1.50 Laundry Washer or Tumbler 2.00 Pumps Line Shafts Centrifugal 0.75 Any processing Machinery 1.50 Descaling, with Accumulators 1.25 Machine Tools Gear, Rotary or Vane 1.25 Auxilliary Drive 1.00 Reciprocating Bending Roll, Notching Press, Punch Press, Planer, Plate Reversing 1.75 1 cylinder, single or double acting 2.00 MainDrive 1.50 2 cylinder, single acting 2.00 Traverse Drive 1.00 2 cylinder, double acting 1.75 Metal Forming Machines 3 or more cylinders 1.50 Draw Bench Carriage & Main Drive 2.00 Screens Extruder 2.00 Air Washing 1.00 Forming Machine & Forming Mills 2.00 Grizzly 2.00 Slitters 1.00 Rotary Coal or Sand 1.50 Wire Drawing or Flattening 1.75 Vibrating 2.50 Wire Winder 1.50 Water 1.00 Coilers & Uncoilers 1.50 Woodworking Machinery 1.00 Equipment for Hazardous Areas Prime Mover Factor Gas or Oil Engine Motor or Turbine Steam Engine Water Turbine 1 or 3 Cylinders 2 or 4 Cylinders 1.00 1.25 2.00 1.50 Duty Factors Reversing Factor 1.25 2 #DriveLineHarmony www.jbj.co.uk/bellhousings.html
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