Platinum Belt Design Manual - Jason Industrial

POWERING GLOBAL INDUSTRY
DRIVE CALCULATION
PROCEDURE
STEP 5 - STATIC TENSION CALCULATION
When installing a new PLATINUM belt, the belt tension is chosen to avoid:
• TOOTH JUMP. Assure that the belt is tensioned adequately to prevent tooth jump under
the most severe load conditions that the drive will encounter.
• EXTREMELY HIGH BELT TENSION. Avoid extremely high tension which results in elevated
noise levels and reduced belt and bearing life.
a) Determination of (K m )
To compensate for the peak torque of a motor, a correction factor (K m ) is applied to the motor
horsepower and is found in Table 6.
TABLE 6 - CLASS OF MOTOR K m
CLASS A CLASS B CLASS C
1.35 1.5 1.75
b) Calculate the belt linear speed (V)
Determine the linear speed of the belt using the following formulae:
d
p
n
V
1f
3.82
Where:
V = Belt linear speed (ft/min)
d p = Faster pulley pitch diameter (in)
n f = rpm of faster pulley
[6]
c) Determine the belt mass (m)
The belt mass per unit of length (lb/ft) for pitch and width is given in Table 7 below:
TABLE 7 - BELT MASS (lb/ft)
BELT WIDTH 8M 14M
mm lb/ft lb/ft
12 0.039
20 0.119
22 0.071
35 0.113
42 0.250
60 0.194
65 0.386
90 0.535
120 0.713
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