Figure 2-3 - Belt Drive Overhung Load Calculations - GD P Series Parts List Operating And Service Manual

7CDL
Drive Dimensions
Shaft
Location
A
Discharge
End 8.64 3.65
(Standard)
Gear
End 10.12 5.30
(Optional)
MAXIMUM ALLOWABLE MOMENT
Z Ac Z
0.000 1.000 0.250
0.025 0.997 0.275
0.050 0.994 0.300
0.075 0.990 0.325
0.100 0.987 0.350
0.125 0.983 0.375
0.150 0.980 0.400
0.175 0.977 0.425
0.200 0.973 0.450
0.225 0.969 0.475
Key: Ac
Hp
S.F.
D
RPM
Z
FIGURE 2-3 – V-BELT DRIVE OVERHUNG LOAD CALCULATIONS
Maximum
Allowable
(Inches) Moment
(LB-IN)
B C
(Max)
0.5
0.5
Ac Z Ac
0.966 0.500 0.926 0.750
0.962 0.525 0.922 0.775
0.958 0.550 0.917 0.800
0.954 0.575 0.913 0.825
0.951 0.600 0.908 0.850
0.947 0.625 0.904 0.875
0.943 0.650 0.899 0.900
0.939 0.675 0.894 0.925
0.935 0.700 0.889 0.950
0.930 0.725 0.884 0.975
ARC OF CONTACT FACTORS
Belt Pull = 2.5 – Ac
Ac
= Arc of Contact Factor (Refer to Arc of Contact Factor Chart above)
= Blower Horsepower for Operating Conditions
= Drive Servce Factor (use 1.4 S.F. for continuous duty applications)
= Blower Sheave Pitch Diameter in Inches
= Blower Sheave Speed
= Large Sheave Pitch Diameter (in) – Small Sheave Pitch Diameter (in)
Sheave Center Distance (in)
CALCULATION OF BELT PULL
Shaft Moment (LB-IN) = Belt Pull
CALCULATION OF SHAFT MOMENT
37-1-614
5,985
5,985
DRIVE SHAFT ILLUSTRATION
Z Ac Z
0.879 1.000 0.823
0.874 1.025 0.816
0.869 1.050 0.810
0.864 1.075 0.803
0.858 1.100 0.796
0.852 1.125 0.789
0.847 1.150 0.782
0.841 1.175 0.774
0.835 1.200 0.767
0.829 1.225 0.759
125954 x Hp x S.F.
D x RPM
x B + C + Sheave Width
2
Page 14
Ac Z Ac
1.250 0.751
1.275 0.742
1.300 0.734
1.325 0.725
1.350 0.716
1.375 0.706
1.400 0.697
1.425 0.687