Page 120 - Goodyear2011PTCatalog

P O W E R T R A N S M I S S I O N P R O D U C T S G E N E R A L I N F O R M A T I O N
118
G E N E R A L I N F O R M A T I O N
T e c h n i c a l I n f o r m at i on
D. Diameter (in)
P. Span Length
F. Force (lbs) Q. Deflection (in) d. Diameter (in)
C. Center Distance (in)
5. Place a straightedge or reference line across the top of the belt.
6. Determine the proper deflection force to tension the belt.
Deflection forces are given in the following tables. Deflection
forces are also given on the output of the MaximizerPro™
computer drive analysis.
a) If using a tension gauge, the deflection scale is calibrated in
inches of span length. Check the force required to deflect the
belt the proper amount. There is an O-ring to help record the
force. If the measured force is less than the required deflection
force, lengthen the center distance. If the measured force is
greater than the required deflection force, shorten the center
distance. See chart on page 119 for deflection values and
tension gauges available.
b) If using other means to apply force to the belt, adjust the
center distance so that the belt is deflected 1⁄64 per inch of
span length when the proper force is applied. See chart on
page 119 regarding TensionRite® Belt Frequency Meter
which calculates belt tension by measuring span vibrations.
F = Deflection Force
q = Deflection, 1⁄64˝ per inch of span length
C = Center Distance
D = Large Sprocket Pitch Diameter
d = Small Sprocket Pitch Diameter
P = Span Length
7. After the belt is properly tensioned, lock down the center
distance adjustments and recheck the sprocket alignment.
8. If possible, run the drive for approximately 5 minutes with or
without load. Stop the drive and lock out the power source
and examine alignment, capscrew torque and belt tension.
Adjust the center distance to increase the belt tension to the
“New” value in the Table on page 86. Lock down the drive
adjustments and recheck tension.
9. Recheck the belt tension, alignment, and capscrew torque after
eight hours of operation to ensure the drive has not shifted.
P= C2 - ( )2 D-d
2