Page 49 - 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 B A N D E D
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B A N D E D
2 0 1 1
B a n d e d B e lt s
Because of their banded or joined construction, these belts tend
to prevent rollover and reduce vibration tendencies. Banded
belts are usually better suited to unusual drive situations than
are matched belt sets. They are available in the classical cross
sections (A, B, C, & D), narrow cross sections (3V, 5V, & 8V), and
Poly-V® cross sections (H, J, L, & M).
Typical applications for banded V-belts include vertical shaft
drives, clutching drives, and V-flat drives. (V-belt drives are where
the inside of the belt drives a flat pulley on the slower speed shaft.)
Banded V-belts are recommended for use where belt vibration or
belt whip causes unsatisfactory results when conventional multiple
single V-belts are used. Such situations are not uncommon on
drives with a combination of long belt spans and/or pulsating
loads as created by an internal combustion engine or reciprocating
pumps and compressors. In such cases, belt whip may become
so severe that belts interface with each other and turn over in the
grooves or even jump out of the grooves. Banded V-belts eliminate
such problems.
Another advantage of banded V-belts is the considerable degree
of design flexibility they can provide since they operate just as
effectively when they, in turn, are used as match sets. A two-
belt unit for example, has sufficient lateral rigidity so as to not
interface with the units in adjacent grooves.
These belts are available for low-speed, high-power applications
which were previously considered to be in the domain of chain
or gears. Flexten-reinforced Torque Team Plus 5V and 8V
banded belts are ideally suited to handle many of the applications
that have been reserved for chain or gears.
Poly-V belts are flat belts with a series of longitudinal ribs on the
driving face that mate with grooves in the sheave rim. Relatively
thin, with a well-supported tensile member, these belts perform
better than V-belts on drives with small sheave, high speeds,
reverse bends, and high-speed ratios. Poly-V belts generally run
smoother than V-belts, and their low weight makes them suitable
for high-speed drives.
Three cross sections, designated J, L, and M, handle the same
range of industrial applications as narrow or classical belts.
A smaller section, H, is used for small sheave and miniature
drives. Finally, the K section Poly-V is often located in the
Automotive industry.
C l a s s i c a l & N a r r ow B a n d e d V- B e lt s
T o r qu e T e a m P l u s ® (F lexten ®-R einforced Banded V-B elts )
P o ly -V (V-R ibbed )