Speed Factor Table f (--). Is used to adjust the table value of P for different input speeds than the rated value of 1500 rpm. v Speed Factor fv 3000 Input Speed n (rpm) 1 2500 2000 1750 1500 1250 1000 750 500 0.50 0.62 0.75 0.88 1.00 1.25 1.50 1.75 2.00 Horizontal Mounting 0.43 0.56 0.71 0.82 0.95 1.18 1.41 1.68 1.90 Vertical Mounting Uniform Agitators and mixers for uniform density, conveyors, generators, small winches. Moderate shock Crane slewing, travel and hoist, calenders, concrete mixers and pumps, piston pumps. Heavy shock Crushing machines, excavators, foundry equipment, mills, presses, rolling mills, rotary boring tools. Start/stop frequency Driven machine Type of loading Light shock Multi cyl. combustion engine 1.0 - 1.3 1.7 - 2.0 2.0 - 2.5 Moderate shock Single cyl. combustion engine 1.0 - 1.3 2.0 - 2.5 2.5 - 3.0 Type of loading Application Factor Table Uniform Electric and hydraulic motor 1.0 - 1.3 1.2 - 1.7 1.7 - 2.0 Fewer More Fewer More Fewer More Selection Example 1 Selection Example 2 Links back to Temperature Factor Table 100% 75% 67% 50% 33% 25% 20% 10% 1.29 1.48 1.57 1.82 2.24 2.57 2.87 3.00 0°C 1.14 1.32 1.40 1.62 1.99 2.29 2.56 3.00 10°C 1.00 1.15 1.22 1.41 1.74 2.00 2.24 3.00 20°C 0.86 0.99 1.05 1.21 1.49 1.71 1.92 2.71 30°C 0.71 0.82 0.87 1.01 1.24 1.43 1.60 2.26 40°C 0.57 0.66 0.70 0.81 0.99 1.14 1.28 1.81 50°C Ambient Temperature: Temperature Factor ft Percentage of Utilization at Equal Distribution over 1 Hour ft (--). This is used to adjust the table value of P for a choice of ambient temperatures and percentages of usage based on the principle: 1 hour continuous duty = 100% usage
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