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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 V - B E L T
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V - B E L T
2 0 1 1
V- B e lt s
V-belts include not only traditional classical and narrow
profiled belts, but also Double-V and FHP belts. When
synchronization or timing is not required, V-belts make an
excellent low-cost, quiet, and efficient means of transmitting
power. However, not all V-belts perform the same. Depending on
your application and your objectives, some V-belts will be better
at getting you closer to your end goal.
The 3L, 4L, and 5L light-duty FHP belts are part of the
V-Belt line also. As the name implies, these belts are used
soley on drives of 1 hp or less.
Goodyear Engineered Products provide a complete offering
of cogged, raw-edge belts in narrow, classical, and FHP styles.
Designated 3VX, 5VX, AX, BX, CX, 4L, and 5L, cogged, raw-
edge V-belts have higher capacity and efficiency, and they use
smaller sheaves than traditional envelope (wrapped) belts. These
belts have a higher coefficient of friction and are more aggressive,
which makes them a very efficient belt for power transmission.
Unlike conventional fabric-covered V-belts, raw-edge belts have
no cover. Thus, the cross-sectional area normally occupied by
the cover is used for more load-carrying cord. Cogs on the inner
surface of the belt increase air flow to enhance cooler running.
They also increase flexibility, allowing the belt to operate with
smaller sheaves. With classical V-belts, certain under-designed or
problem drives can be upgraded to “satisfactory” by substituting
classical cogged belts for classical envelope belts without
replacing sheaves.
Because of their higher coefficient of friction, cogged belts tend
to be more sensitive to alignment. While envelope belts can
tolerate some misalignment, cogged belts are more likely to turn
over under the same conditions. Cogged belts should not be used
in clutching drives, drives with severe shock loads, and drives that
have changing center distances, such as shaker screens. In these
applications, the aggressive nature and flexibility of cogged belts
can cause vibration, belt turnover, and belt breakage. Cogged
belts should also be avoided in drives that require slippage during
frequent stops and starts.
A variation of the classical belt, Hex belts come in AA, BB, CC, or
a deep CCP cross section. These belts transfer power from either
side in serpentine drives. A drive design using Hex belts is more
complicated and engineering manuals should be consulted when
replacing or troubleshooting these drives.
The most widely used V-belts are A, B, C, and D classical belts.
Used more out of habit and convenience than design, these belts
can handle fractional to 500-hp drives, usually at the lowest
cost. However, they occupy more space, and the drives weigh
more than narrow-belt drives. Also, classical belts are usually less
efficient than narrow belts. But their versatility and wide range of
sizes and types make them an attractive alternative to wedge belts.
Many classical belts are used for replacement because it is
considered too costly to replace sheaves when upgrading
from classical to narrow or other belt types. Therefore, when
replacing classical sheaves, it is an opportune time to upgrade to
narrow or other belt types.
Effectively handling drives from 1 to 1,000 hp, these belts rank high
in horsepower-hours per dollar, the ultimate measure of drive value.
The narrow-belt cross sections (3V, 5V, and 8V), offer higher power
capacity for any sheave size and weight.
The narrow or “wedge” design provides more tensile member
support than classical V-belts. Narrow belts handle an equivalent
load, but with narrower face width and smaller diameters
than the traditional classical V-belts. These features allow
the use of smaller belts or fewer belts to transmit the load,
an important advantage if your goal is to maximize power
transmission efficiency by reducing drive weight and size.
N a r r ow V- B e l t s
C l a s s i c V- B e l t s
D ou b l e -V o r H e x B e l t s
FHP ( F r a c t i o n a l H o r s e p ow e r B e l t s )
C og g e d , R aw - E d g e C o n s t r u c t i o n v s . E n v e l o p e C o n s t r u c t i o n
When equipment calls for metric precision, you need a belt that
not only measures up, but one that won’t get lost in translation.
GY Metric belts are engineered to universal metric profiles,
but manufactured by Veyance Technologies in North America,
so you don’t have to go elsewhere to get them.
Strong, flexible and able to work in wide temperature ranges, GY
Metric® replaces many common metric cross section belts such as
XPZ, XPA, SPA, ,XPB, SPB, XPC and SPC.
S p e c i a lt y V- B e l t s