Gardner Denver GAF P Series, Operating And Service Manual

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SB-7-622 Page 12
Gear
Diameter
(Inches)
Dimensions
(Inches)
Maximum
Allowable
Moment
(LB-IN) A B C
(Max)
6 4.08 1.14 .38 1788
7 4.50 1.31 .38 3000
8 5.57 1.77 .38 4144
MAXIMUM ALLOWABLE MOMENT
DRIVE SHAFT ILLUSTRATION
Z Ac Z Ac Z Ac Z Ac Z Ac Z Ac
0.000 1.000 0.250 0.966 0.500 0.926 0.750 0.879 1.000 0.823 1.250 0.751
0.025 0.997 0.275 0.962 0.525 0.922 0.775 0.874 1.025 0.816 1.275 0.742
0.050 0.994 0.300 0.958 0.550 0.917 0.800 0.869 1.050 0.810 1.300 0.734
0.075 0.990 0.325 0.954 0.575 0.913 0.825 0.864 1.075 0.803 1.325 0.725
0.100 0.987 0.350 0.951 0.600 0.908 0.850 0.858 1.100 0.796 1.350 0.716
0.125 0.983 0.375 0.947 0.625 0.904 0.875 0.852 1.125 0.789 1.375 0.706
0.150 0.980 0.400 0.943 0.650 0.899 0.900 0.847 1.150 0.782 1.400 0.697
0.175 0.977 0.425 0.939 0.675 0.894 0.925 0.841 1.175 0.774 1.425 0.687
0.200 0.973 0.450 0.935 0.700 0.889 0.950 0.835 1.200 0.767
0.225 0.969 0.475 0.930 0.725 0.884 0.975 0.829 1.225 0.759
ARC OF CONTACT FACTORS
Belt Pull = 2.5
– Ac
X 125954 x Hp x S.F.
Ac D x RPM
Key: Ac =Arc of Contact Factor (Refer to Arc of Contact Factor Chart above)
Hp = Blower Horsepower for Operating Conditions
S.F. = Actual Drive Service Factor
D = Blower Sheave Pitch Diameter in Inches
RPM = Blower Sheave Speed
Z =Large Sheave Pitch Diameter (in)
– Small Sheave Pitch Diameter (in)
Sheave Center Distance (in)
CALCULATION OF BELT PULL
Shaft Moment (LB-IN) = Belt Pull x B + C+ Sheave Width
2
CALCULATION OF SHAFT MOMENT
FIGURE 2- 2 – BELT DRIVE OVERHUNG LOAD CALCULATIONS