GD 7CDL, Parts List Operating And Service Manual

Page: 14 / 55

37-1-614 Page 14
Dimensions
(Inches)
7CDL
Drive
Shaft
Location
A B C
(Max)
Maximum
Allowable
Moment
(LB-IN)
Discharge
End
(Standard)
8.64 3.65 0.5 5,985
Gear
End
(Optional)
10.12 5.30 0.5 5,985
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 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. = Drive Servce Factor (use 1.4 S.F. for continuous duty applications)
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 2-3 – V-BELT DRIVE OVERHUNG LOAD CALCULATIONS