CALCULATION OF BELT PULL
Belt Pull =
»¼
º
«¬
ª
AC
AC
5
.
2
×
»¼
º
«¬
ª
u
u
u
RPM
D
F
S
Hp
.
.
125954
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 =
»
¼
º
«
¬
ª
(in)
Distance
Center
Sheave
(in)
Diameter
Pitch
Sheave
Small
-
(in)
Diameter
Pitch
Sheave
Large
CALCULATION OF SHAFT MOMENT
Shaft Moment (LB-IN) = Belt Pull
»
¼
º
«
¬
ª
¸
¹
·
¨
©
§
u
2
Width
Sheave
C
B
4.4. Oil Capacities
At the gear end, the timing gear teeth are lubricated by being partially submerged in oil. The gear teeth
serve as oil slingers for gear end bearings.
Horizontal Flow Configuration Vertical
Flow Configuration
Model
Gear
Diameter(i
n)
Gear End
Drive End *
Gear End
Drive End *
ZZ2M
˄
L
˅
2.76 1.83
OZ Grease 1.3 OZ
4.59 OZ
Grease 1.3 OZ
ZZ3M
˄
L
˅
3.54 4.03
OZ
Grease 1.48 OZ
11.44 OZ
Grease 1.48 OZ
ZZ4M
˄
L
˅
4.04 6.70
OZ
Grease 1.67 OZ
15.15 OZ
Grease 1.67 OZ
ZZ5MA
˄
LA
˅
5.08 14.83
OZ
Grease 2.37 OZ
36.41 OZ
Grease 2.37 OZ
ZZ6M
˄
L
˅
5.98 28.67
OZ
Grease 11.23 OZ
65.22 OZ
Grease 11.23 OZ
ZZ7M
˄
L
˅
7.09 68.86
OZ
Grease 16.69 OZ
128.01 OZ
Grease 16.69 OZ
Drive end bearings are grease lubricated at the factory with Lithium Complex based grease.
*Reference Value
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Phone: 704-545-3922 Pg. 10
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