ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual page 848

Dimensions
Gear
(Inches)
Diameter
A B
(Inches)
3 2.88 .85
4 3.49 1.10
5 3.90 1.40
Dimensions
Gear
(Inches)
Diameter
A B
(Inches)
3 3.07 1.18
4 3.62 1.27
5 3.85 1.39
Z Ac Z
0.000 1.000 0.250 0.966
0.025 0.997 0.275 0.962
0.050 0.994 0.300 0.958
0.075 0.990 0.325 0.954
0.100 0.987 0.350 0.951
0.125 0.983 0.375 0.947
0.150 0.980 0.400 0.943
0.175 0.977 0.425 0.939
0.200 0.973 0.450 0.935
0.225 0.969 0.475 0.930
Belt Pull =
Key: Ac
Hp
S.F.
D
RPM
Z
Maximum
Allowable
Moment
C
(LB-IN)
(Max)
.38 385
.38 490
.38 1245
Maximum
Allowable
Moment
C
(LB-IN)
(Max)
.25 385
.25 650
.25 1370
Ac Z Ac Z
0.500 0.926 0.750
0.525 0.922 0.775
0.550 0.917 0.800
0.575 0.913 0.825
0.600 0.908 0.850
0.625 0.904 0.875
0.650 0.899 0.900
0.675 0.894 0.925
0.700 0.889 0.950
0.725 0.884 0.975
2.5 – Ac X
Ac
= Arc of Contact Factor (Refer to Arc of Contact Factor Chart above)
= Blower Horsepower for Operating Conditions
= Actual Drive Service Factor
= Blower Sheave Pitch Diameter in Inches
= Blower Sheave Speed
= Large Sheave Pitch Diameter (in) – Small Sheave Pitch Diameter (in)
Sheave Center Distance (in)
Shaft Moment (LB-IN) = Belt Pull
Ac Z Ac
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
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
E-105